WO1996020997A1 - Detergent composition comprising cellulase enzyme and nonionic cellulose ether - Google Patents

Abstract

The present invention relates to a detergent composition comprising at least 1 % of a surfactant system. Said system comprises a nonionic polysaccharide ether and a cellulolytic enzyme.

Description

DETERGENT COMPOSITION COMPRISING CELLULASE ENZYME AND NONIONIC CELLULOSE ETHER

Field of the Invention

The present invention relates to detergent compositions for improved clay stain removal comprising a nonionic polysaccharide ether and a cellulolytic enzyme.

Background of the Invention

During the laundering operation of fabrics it is highly desirable to provide the fabric, particularly man-made fabrics produced from synthetic fibres, with soil release properties.

Due to the hydrophobic nature of fabrics composed of partially or completely synthetic fibres, the removal of greasy soils and stains therefrom is particularly difficult. In order to address this problem, soil release polymers may be incorporated into the detergent composition. During laundering the soil release agents are adsorbed onto the surface of the fabric, thereby inducing greater hydrophobicity to the fabric surface. Once the fabric is treated with a soil release agent, the ease of removal of soils and stains from the surface of the fabric is considerably improved.

The main types of soil release agents incorporated into detergent compositions, which provide benefits to primarily hydrophobic synthetic fabrics include synthetic soil release agents, preferably terephthalate based and polysaccharide ethers. Polysaccharide ethers such as cellulose ethers have been described for example in GB 1 534 641, which discloses nonionic surfactant detergent compositions comprising cellulose ether soil release agents such as alkyl and hydroxyalkyl cellulose ethers. The soil release performance of the polysaccharide ethers may b improved upon greasy/oily stains by increasing the degree of substitutio and the chain length of the subsitutent. This results in the polysaccharid ether being only weakly and temporarily bound to the fabric surface an thus easily removed once soiling has occurred.

The soil release performance of the polysaccharide ethers ma further improved by increasing the amount of polysaccharide ether used an or by increasing the molecular weight or degree of polymerisation (dp). However, high molecular weight polysaccharide ethers are known to hav detrimental effects on the clay soil removal and anti-redeposition performance of the detergent composition in which they are incorporated. This is particularly evident on fabrics after a number of repeated washing cycles or when high dosage or concentrations of detergent composition are utilised to clean heavily soiled fabric. Furthermore, this problem is also acute on fabrics which contain a high percentage of synthetic fibres.

During the laundering operation it is also desirable reduce the effects of aging on the fabrics. Aging of naturally based fabrics results in the damage of the top surface fibres which increases the number of soil collection sites and results in the fabric gaining an unhomogeneous feel. This may be addressed by the incorporation of cellulolytic enzymes into detergent compositions. The cellulolytic enzyme removes the damaged surface fibres and thereby improves stain removal, fabric appearance and reduces the hardness of the fabric after multiple washing. However, the cellulolytic enzyme by its very nature hydrolyses and depolymerises polysaccharide ethers having 1 ,4 β-glucosidic bonds. This problem of cellulase and polysaccharide ether incompatibility is particularly acute for low substituted polysaccharide ethers which appear more 'cellulosic' in nature.

Thus, it is an aim of the present invention to provide a detergent composition comprising a cellulolytic enzyme and a nonionic polysaccharride ether, whereby the soil release performance of the polysaccharide is enhanced by the presence of the cellulolytic enzyme. It has now been found that this objective can be achieved by the use of selected nonionic polysaccharide ethers having specified degrees of polymerisation and substitution. It is believed that the nonionic polysaccharide ethers of the present invention can be deposited onto the fabric surface prior to the start of degradation by the cellulolytic enzyme .

In addition, a further advantage of the present invention is that the subsequent cellulolytic enzyme attack upon the polysaccharides after their deposition on the fabric, aids the removal of trapped particulate soils and clay soil removal.

Another advantage of the present invention is that high molecular nonionic polysaccharide ethers may be used in combination with cellulase to provide soil release benefits without affecting the clay soil removal performance.

A further advantage of the present invention is that the detergent conposition delivers improved whiteness performance and fabric feel.

Nonionic polysacchairdes and cellulolytic enzymes have been described in the art. EPO 495 257 discloses a compact detergent composition comprising high activity cellulolytic enzyme. Anti-redeposition agents such as cellulose derivatives are disclosed, in particular methyl cellulose, carboxymethylcellulose (CMC) and hydroxyethyl cellulose. Only CMC and cellulolytic enzyme is exemplified and there is no disclosure of the specific combination of cellulolytic enzyme and cellulose ether.

EPO 320 296 discloses fabric softening additives for detergent compositions comprising a water soluble nonionic ethyl hydroxyethyl cellulose having an HLB of 3.3 to 3.8, a dp of 50 to 1200 and a ds of 1.9 to 2.9. Enzymes including cellulolytic enzyme are disclosed. The combination of cellulose ether and cellulolytic enzyme is not exemplified.

EPO 213 730 discloses detergent compositions with fabric softening properties comprising a nonionic substituted cellulose ether derivative, having a ds of from 1.9 to 2.9 and dp of 50 to 1200. Enzymes such as cellulolytic enzyme are mentioned. The combination of cellulose ether and cellulolytic enzyme is not exemplified.

EPO 173 397 discloses detergent compositions comprising a cationic softening agent and a fungal cellulolytic enzyme. Soil suspending agents such as water soluble salts of CMC, carboxyhydroxymethyl cellulose are disclosed. Their preferred dp or ds values are not mentioned.

Summary of the Invention

The present invention is a detergent composition comprising at least 1% of a surfactant system, characterised in that said system comprises a nonionic polysaccharide ether having a 1 ,4 β-glucosidic bond, a degree of polymerisation of 100 or more and a degree of subsitution of from 0.5 to 2.8 inclusive or mixtures thereof, in combination with a cellulolytic enzyme.

All amounts, weights and ratios as used herein are as a % weight of the detergent composition.

Detailed Description of the Invention

Nonionic Polysaccharide ethers

According to the present invention an essential component of the detergent composition is a nonionic polysaccharide ether having a 1 , 4 β- glucosidic bond. Chemically, the polysaccharides are composed of pentoses or hexoses. Suitable polysaccharide ethers for use herein are selected from cellulose ethers, starch ethers, dextran ethers and mixtures thereof. Preferably said nonionic polysaccharide ether is a cellulose ether. Cellulose ethers are generally obtained from vegetable tissues and fibres, including cotton and wood pulp.

The hydroxy group of the anhydro glucose unit of cellulose can be reacted with various reagents thereby replacing the hydrogen of the hydroxyl group with other chemical groups. Various alkylating and hydroxyalkylating agents can be reacted with cellulose ethers to produce either alkyl-, hydroxyalkyl- or alkylhydroxyalkyl-cellulose ethers or mixtures thereof. The most preferred for use in the present invention are C1-C alkyl cellulose ether or a C1-C4 hydroxyalkyl cellulose ether or a C1-C4 alkylhydroxy alkyl cellulose ether or mixtures thereof. Preferably the polysaccharides of the present invention have a degree of substitution of from 0.5 to 2.8, preferably from 0.5 to 2.2, most preferably from 0.5 to 2 inclusive.

Suitable cellulose ethers include methylcellulose ether, hydroxypropyl methylcellulose ether, hydroxyethyl methylcellulose ether, hydroxypropyl cellulose ether, hydroxybutyl methylcellulose ether, ethylhydroxy ethylcellulose ether, ethylcellulose ether and hydroxy ethylcellulose ether. Most preferably said polysaccharide is a methylcellulose ether. Such agents are commercially available such as METHOCEL (Dow Chemicals) and Bermocoll (Nobel). The nonionic polysaccharides of the present invention in addition to the nonionic substituent may also be partially charged. For example by replacing one of the hydroxy groups with an anionic group.

According to the present invention said polysaccharide ether has a degree of polymerisation of more than 100. As used herein the term degree of polymerisation (dp) is the ratio of the weight average molecular weight on average molecular unit weight, i.e. dpsMWyy MUW. The weight average molecular weight (MW ) is obtained by standard analytical methods as described in Polymer handbooks. A preferred method is light scattering from polymer solutions as originally defined by Debye.

For example the average molecular unit weight (MUW) for methylcellulose ether may be determined from the sum of the molecular weight of the unsubstituted cellulose unit and the product of the degree of polymerisation and the molecular weight of the substituent less the hydrogen mass (1). i.e. MUW= 162 + (15-1)* ds -for methyl substituents found in methyl cellulose ethers.

MUW may also be determined from the "% methoxyl content" value (mc) also used by manufactures of methyl cellulose ethers instead of the degree of substitution, such that; MUW= 100 - [(mol. wt. of CH2 mol. wt. of OCH3)*mc]

The compositions of the present invention comprise from 0.01% to 10%, preferably from 0.01% to 3%, most preferably from 0.1% to 2% of said nonionic polysaccharide ethers.

Cellulolytic enzvme

In the present specification and claims, the terms "cellulase" and "cellulolytic" denote an enzyme that hydrolyses cellulose. The cellulase component may be a component occurring in a cellulase system produced by a given microorganism, such a cellulase system mostly comprising several different cellulase enzyme components including those usually identified as e.g. ceilobiohydroiases, exo-cellobiohydrolases, endoglucanases, β-glucosidases.

Alternatively, the cellulase component may be a single component, i.e. a component essentially free of other cellulase components usually occurring in a cellulase system produced by a given microorganism, the single component being a recombinant component, i.e. produced by cloning of a DNA sequence encoding the single component and subsequent cell transformed with the DNA sequence and expressed in a host, cf. e.g. International Patent Applications WO 91/17243 and WO 91/17244 which are hereby incorporated by reference. The host is preferably a heterologous host, but the host may under certain conditions also be the homologous host.

The term "particulate soil removal", as used herein, refers to enhanced cleaning of cellulose-containing fabrics or garment, e.g. cotton, contaminated by particles of soil or of other insoluble matter entrapped by microfibrills spreading out on the fibre surface.

The term "retaining-type activity", as used herein, is intended to mean the stereochemical course of hydrolysis catalysed by a cellulase wherein the mechanism (of a retaining glycosidase) is as shown in Chem. Rev., 90, p. 1171-1202 (1990) (Sinott, M.L.: Catalytic mechanism of enzymatic glycosyl transfer). Both the cleavage product leaving the active site of the cellulase having retaining-type activity as well as the substrate is in β-con- figuration, cf. Eur. J. Biochem, 217, p. 947-953 (1993).

The term "inverting-type activity", as used herein, is intended to mean the stereochemical course of hydrolysis catalysed by a cellulase wherein the mechanism (of an inverting glycosidase) is as shown in Chem. Rev., 90, p. 1171-1202 (1990) (Sinott, M.L: Catalytic mechanism of enzymatic glycosyl transfer) and Eur. J. Biochem, 217, p. 947-953 (1993).

The stereochemistry of hydrolysis of the glycosidic bond is firmly dictated by the structure and topology of the enzyme active site and is usually interpreted as the result of a single-displacement or double displacement catalytic mechanism. It is believed that ail enzymes in a given cellulase family, cf. Gene (Amst.), 81 , p. 83-95 (1989) and Biochem. J., 293, p. 781-788 (1993), have a similar fold even when their amino acid conservation is extremely low, and it is furthermore shown that members of a given cellulase family all have the same general fold and topology (J. Biochem, 217, p. 947-953 (1993)).

Furthermore, it is contemplated that the cellulase may have an exo- mode of action, the term "exo-mode of action" being intended to mean initi¬ ating degradation of cellulose from the non-reducing chain ends by remov¬ ing cellobiose units.

Alternatively, it is contemplated that the cellulase may have an endo- mode of action, the "endo-mode of action" being intended to mean hydrolys¬ ing amorphous regions of low crystallinity in cellulose fibres.

The term "domain", as used herein, is intended to indicate an amino acid sequence capable of effecting a specific task. For example is the term "carbohydrate binding domain" or "cellulose binding domain" ("CBD") intended to indicate an amino acid sequence capable of effecting binding of the enzyme to a carbohydrate substrate, in particular cellulose, and the term "catalytic active domain" ("CAD") is intended to indicate an amino sequence capable of effecting catalytic cleavage and having one or more active sites. A CBD is an example of a non-catalytic domain. CAD's and CBD's may be linked or attached by linking regions. Cf. Trends Biotechnol., 5, p. 255-26 (1987) and Microbiol. Rev., 55, p. 303-315 (1991 ).

The term "core enzyme", as used herein, is intended to indicate a enzyme consisting essentially of a single domain, i.e. a catalytic activ domain, the core enzyme having no "tail".

The term "activity towards dyed microcrystaliine cellulose" as use herein refers to a hydrolytic activity towards microcrystaliine cellulos covalently labelled with a light absorbing fluorogenic compound, e.g. reactive dye, determined spectroscopically by measuring the liberation of la belled products resulting from hydrolysis under conditions simulatin washing conditions with respect to alkaline pH, temperature, duration, agita tion and detergent concentrations.

Accordingly, a cellulase exhibiting catalytic activity towards dye microcrystaliine cellulose must be active in releasing labelled soluble prod¬ ucts from modified microcrystaliine cellulose under simulated washing con ditions.

The term "activity towards short cellooligosaccharides" as used herein, refers to an activity towards cellooligosaccharides containing two glucose units and an additional leaving group, such as e.g. a glucose unit, or a modified glucose unit, or a chromogenic/fiuorogenic group, or other groups, resulting in splitting the glycosidic bond and measured as reducing end recovery or chromogenic or fluorogenic label compound liberation under hydrolysis under conditions simulating washing conditions with respect to alkaline pH, temperature, duration, agitation and detergent concentrations.

Accordingly, a cellulase exhibiting a catalytic activity towards short cellooligosaccharides must be active in hydrolysis of short cellooligo¬ saccharides under washing conditions, the cellooligosaccharides containing two glucose units and an additional leaving group, such as e.g. a glucose unit, or a modified glucose unit, or a chromogenic/fiuorogenic group, or other groups. In the present context, the term "immunoreactive" is intended to indi¬ cate that the produced protein is reactive with an antibody raised against a native cellulose- or nemicellulose-degrading enzyme.

In the present context, the term "homologue" is intended to indicate a polypeptide encoded by DNA which hybridizes to the same probe as the DNA coding for the cellulase component with the amino acid sequence in question under certain specified conditions (such as presoaking in 5xSSC and prehybridising for 1 h at ~40°C in a solution of 20% formamide, δxDenhard^'t's solution, 50 mM sodium phosphate, pH 6.8, and 50 μg of denatured sonicated calf thymus DNA, followed by hybridization in the same solution supplemented with 100 μM ATP for 18 h at ~40°C). The term is intended to include derivatives of the sequence in question obtained by addition of one or more amino acid residues to either or both the C- and N- terminal of the native sequence substitution of one or more amino acid residues at one or more sites in the native sequence, deletion of one or more amino acid residues at either or both ends of the native amino acid sequence or at one or more sites within the native sequence, or insertion of one or more amino acid residues at one or more sites in the native sequence. It is to be understood that any derivative also hybridizes to the same probe as mentioned above which indicates that the cellulase enzyme derivatives within the scope of the present invention all have the same advantageous activity and effect as the cellulase component having the amino acid sequence in question. Also, any additions or substitutions or deletions or insertions may preferably relate to a relatively limited number of amino acids of the sequence in question, i.e. minor additions, substitutions, deletions or insertions, since it is to be expected that major additions, substitutions, deletions or insertions may result in cellulase components (polypeptides) which do not fulfil the above-mentioned hybridizing requirement.

The present invention relates to a detergent composition comprising a cellulase having retaining-type activity and being capable of particulate soil removal or a cellulase having multiple domains comprising at least one non- catalytic domain attached to a catalytic domain and being capable of colour clarification. Preferably the cellulase is a single (recombinant) component. The cellulase may be obtained from the microorganism in question by use of any suitable technique. For instance, a cellulase preparation may be obtained by fermentation of a microorganism and subsequent isolation of a cellulase containing preparation from the fermented broth or microorganism by methods known in the art, but more preferably by use of recombinant DNA techniques as known in the art. Such method normally comprises cultivation of a host ceil transformed with a recombinant DNA vector capable of expressing and carrying a DNA sequence encoding the cellulase component in question, in a culture medium under conditions permitting the expression of the enzyme and recovering the enzyme from the culture.

CLONING A DNA SEQUENCE ENCODING A CELLULASE

The DNA sequence encoding a parent cellulase may be isolated from any cell or microorganism producing the cellulase in question by various methods, well known in the art. First a genomic DNA and/or cDNA library should be constructed using chromosomal DNA or messenger RNA from the organism that produces the cellulase to be studied. Then, if the amino acid sequence of the cellulase is known, homologous, labelled oligonucleotide probes may be synthesized and used to identify cellulase-encoding clones from a genomic library of bacterial DNA, or from a fungal cDNA library. Alternatively, a labelled oligonucleotide probe containing sequences homologous to cellulase from another strain of bacteria or fungus could be used as a probe to identify cellulase-encoding clones, using hybridization and washing conditions of lower stringency.

Yet another method for identifying cellulase-producing clones would involve inserting fragments of genomic DNA into an expression vector, such as a plasmid, transforming cellulase-negative bacteria with the resulting genomic DNA library, and then plating the transformed bacteria onto agar containing a substrate for cellulase. Those bacteria containing celluiase- bearing plasmid will produce colonies surrounded by a halo of clear agar, due to digestion of the substrate by secreted cellulase.

Alternatively, the DNA sequence encoding the enzyme may be prepared synthetically by established standard methods, e.g. the phosphoamidite method described by S.L. Beaucage and M.H. Caruthers, Tetrahedron Letters 22. 1981, pp. 1859-1869, or the method described by Matthes et al., The EMBO J. 3, 1984, pp. 801-805. According to the phosphoamidite method, oligonucleotides are synthesized, e.g. in an automatic DNA synthesizer, purified, annealed, ligated and cloned in appropriate vectors.

Finally, the DNA sequence may be of mixed genomic and synthetic, mixed synthetic and cDNA or mixed genomic and cDNA origin prepared by ligating fragments of synthetic, genomic or cDNA origin (as appropriate), the fragments corresponding to various parts of the entire DNA sequence, in accordance with standard techniques. The DNA sequence may also be pre¬ pared by polymerase chain reaction (PCR) using specific primers, for instance as described in US 4,683,202 or R.K. Saiki et al., Science 239. 1988, pp. 487-491.

EXPRESSION OF CELLULASE VARIANTS

According to the invention, a mutated cellulase-coding sequence produced by methods described above, or any alternative methods known in the art, can be expressed, in enzyme form, using an expression vector which typically includes control sequences encoding a promoter, operator, ribosome binding site, translation initiation signal, and, optionally, a repressor gene or various activator genes. To permit the secretion of the ex¬ pressed protein, nucleotides encoding a "signal sequence" may be inserted prior to the cellulase-coding sequence. For expression under the direction of control sequences, a target gene to be treated according to the invention is operably linked to the control sequences in the proper reading frame. Promoter sequences that can be incorporated into plasmid vectors, and which can support the transcription of the mutant cellulase gene, include but are not limited to the prokaryotic β-lactamase promoter (Villa-Kamaroff, et al., 1978, Proc. Natl. Acad. Sci. U.S.A. 75:3727-3731) and the tac promoter (DeBoer, et al., 1983, Proc. Natl. Acad. Sci. U.S.A. 80:21-25). Further references can also be found in "Useful proteins from recombinant bacteria" in Scientific American, 1980, 242:74-94.

According to one embodiment B. subtilis is transformed by an expression vector carrying the mutated DNA. If expression is to take place in a secreting microorganism such as B. subtilis a signal sequence ma follow the translation initiation signal and precede the DNA sequence o interest. The signal sequence acts to transport the expression product to the cell wall where it is cleaved from the product upon secretion. The term "control sequences" as defined above is intended to include a signal sequence, when is present.

In a currently preferred method of producing cellulase variants of the invention, a filamentous fungus is used as the host organism. The filamentous fungus host organism may conveniently be one which has previously been used as a host for producing recombinant proteins, e.g. a strain of Aspergillus sp., such as A nioer. A nidulans or A orvzae. The use of A orvzae in the production of recombinant proteins is extensively described in, e.g. EP 238 023.

For expression of cellulase variants in Aspergillus. the DNA sequence coding for the cellulase variant is preceded by a promoter. The promoter may be any DNA sequence exhibiting a strong transcriptional activity in Aspergillus and may be derived from a gene encoding an extracellular or intracellular protein such as an amylase, a glucoamylase, a protease, a lipase, a cellulase or a glycolytic enzyme.

Examples of suitable promoters are those derived from the gene encoding A orvzae TAKA amylase, Rhizomucor miehei aspartic proteinase, A nioer neutral α-amylase, A nioer acid stable α-amylase, A niger glucoamylase, Rhizomucor miehei lipase, A orvzae alkaline protease or A orvzae those phosphate isomerase.

In particular when the host organism is A. orvzae. a preferred promoter for use in the process of the present invention is the A orvzae TAKA amylase promoter as it exhibits a strong transcriptional activity in A orvzae. The sequence of the TAKA amylase promoter appears from EP 238 023.

Termination and polyadenylation sequences may suitably be derived from the same sources as the promoter. The techniques used to transform a fungal host cell may suitably be as described in EP 238 023.

To ensure secretion of the cellulase variant from the host cell, the DNA sequence encoding the cellulase variant may be preceded by a signal sequence which may be a naturally occumng signal sequence or a functional part thereof or a synthetic sequence providing secretion of the protein from the cell. In particular, the signal sequence may be derived from a gene encoding an Aspergillus sp. amylase or glucoamylase, a gene encoding a Rhizomucor miehei lipase or protease, or a gene encoding a Humicola cellulase, xylanase or lipase. The signal sequence is preferably derived from the gene encoding A orvzae TAKA amylase, A nioer neutral α -amylase, A niger acid-stable α-amylase or A. nioer glucoamylase.

The medium used to culture the transformed host cells may be any conventional medium suitable for growing Aspergillus cells. The transformants are usually stable and may be cultured in the absence of selection pressure. However, if the transformants are found to be unstable, a selection marker introduced into the cells may be used for selection.

The mature cellulase protein secreted from the host cells may conveniently be recovered from the culture medium by well-known procedures including separating the cells from the medium by centrifugation or filtration, and precipitating proteinaceous components of the medium by means of a salt such as ammonium sulphate, followed by chromatographic procedures such as ion exchange chromatography, affinity chromatography, or the like.

Both the cellulase may be recombinant (single), i.e. produced by clon¬ ing of the DNA sequence encoding the single component and cell transform¬ ation with the DNA sequence and expression in a host which may be hetero- iogous or homologous. However, the cellulase may also be cloned and expressed in the same heterologous or homologous host.

Accordingly, the detergent composition claimed in the present invention should preferably comprise the cellulase in a concentration corre¬ sponding to a concentration in the resulting washing liquor of from 0.001 mg to 100 mg, preferably from O.OOδmg to 50mg of cellulase protein per litre o washing liquor.

Preferably, the cellulase is a fungal or bacterial cellulase component i.e. of fungal or bacterial origin.

It is contemplated that the cellulase may be derived or isolated an purified from microorganisms which are known to be capable of producin cellulolytic enzymes, e.g. species of Humicola. Bacillus. Trichoderma. Fu sarium. Mvceliophthora. Phanerochaete. Schizoohyllum. Penicillium. As pergillus. and Geotricum. The derived components may be either ho mologous or heterologous components. Preferably, the components ar homologous. However, a heterologous component which is immunoreactiv with an antibody raised against a highly purified cellulase componen possessing the desired property or properties and which heterologou component is derived from a specific microorganism is also preferred.

Preferably, the cellulase exhibits catalytic activity on low molecula weight carbohydrate substrates, especially a catalytic activity on cellotrios at pH 8.5 corresponding to kcat of at least 0.01 s^"1 .

The cellulase may be inadequate or unable of providing colour clarifi¬ cation, thus exhibiting low catalytic activity on dyed microcrystaliine cellulo¬ se.

In a preferred embodiment of the invention, the cellulase is a core enzyme, i.e. a cellulase having no "tail" or being a single domain protein.

A convenient cellulase useful in the detergent composition of the present invention may be a cellobiohydrolase component which is immuno¬ reactive with an antibody raised against a highly purified ~70kD cellobiohy¬ drolase (EC 3.2.1.91 ) derived from Humicola insolens, DSM 1800, or which is a homologue or derivative of the ~70kD cellobiohydrolase exhibiting cellulase activity. A preferred cellobiohydrolase component has the amino acid sequence disclosed in Nucleic Acid Research, vol. 18 (1990), page 668 (De Oliviera, Alzevedo, M. and Radford, A.) which is shown in the appended SEQ ID NO:1 or a variant of said cellobiohydrolase having an amino acid sequence being at least 60%, preferably at least 70%, more preferably 75%, more preferably at least 80%, more preferably 85%, especially at least 90% homologous with said sequence.

Another preferred cellobiohydrolase component is a core enzyme ("core CBH I") having an amino acid sequence consisting of 449 amino acids corresponding to the (partial) amino acid sequence numbered 1-449 of the appended SEQ ID NO:1. The core CBH I has an apparant molecular weight of -48 kD.

Alternatively, the cellulase may be an endoglucanase component which is immunoreactive with an antibody raised against a highly purified ~50kD endoglucanase derived from Humicola insolens, DSM 1800, or which is a homologue or derivative of the ^""50kD endoglucanase exhibiting cellulase activity. A preferred endoglucanase component has the amino acid sequence disclosed in PCT Patent Application No. W091/17244, Fig. 14A- E, which is shown in the appended SEQ ID N0:2, or a variant of said endoglucanase having an amino acid sequence being at least 60%, preferably at least 70%, more preferably 75%, more preferably at least 80%, more preferably 85%, especially at least 90% homologous with said sequence.

Alternatively, the cellulase may be an endoglucanase component which is immunoreactive with an antibody raised against a highly purified ~50kD (apparant molecular weight, the amino acid composition corresponds to 45kD with 2n glycosylation sites) endoglucanase derived from Fusarium oxysporum, DSM 2672, or which is a homologue or derivative of the ~50kD endoglucanase exhibiting cellulase activity. A preferred endoglucanase component has the amino acid sequence disclosed in PCT Patent Applica¬ tion No. W091/17244, Fig. 13, which is shown in the appended SEQ ID N0:3, or a variant of said endoglucanase having an amino acid sequence being at least 60%, preferably at least 70%, more preferably 75%, more pre¬ ferably at least 80%, more preferably 85%, especially at least 90% homologous with said sequence.

The endoglucanse herein referred to as EG l-F cellulase component is producible by Aspergillus oryzae after transformation with a plasmid containing the DNA sequence corresponding to the amino acid sequence of the appended SEQ ID N0:3 and using the conventional Taka promotor and AMG terminator. The EG l-F may be purified to homogeneity using cationic chromatography and has a pi >9. The calculated pi is 9 based on the amino acid composition using the PHKa values from Adv. Protein Chem. 17, p. 69- 165 (1962)(C. Tanford). The molar exctinction coefficient is calculated to be 58180.

Yet another preferred cellulase may be any of the cellulases disclosed in the published European Patent Application No. EP-A2-271 004, the cellulase having a non-degrading index (NDI) of not less than 500 and being an alkalophilic cellulase having an optimum pH not less than 7 or whose relative activity at a pH of not less than 8 is 50% or over of the activity under optimum conditions when carboxy methyl cellulose (CMC) is used as a substrate; the cellulase preferably being selected from the group consisting of alkaline cellulase K (produced by Bacillus sp. KSM-635, FERM BP 1485); alkaline cellulase K-534 (produced by Bacillus sp. KSM-534, FERM BP 1508); alkaline cellulase K-539 (produced by Bacillus sp. KSM-539, FERM BP 1509); alkaline cellulase K-577 (produced by Bacillus sp. KSM-577, FERM BP 1510); alkaline cellulase K-521 (produced by Bacillus sp. KSM- 521 , FERM BP 1507); alkaline cellulase K-580 (produced by Bacillus sp. KSM-580, FERM BP 1511 ); alkaline cellulase K-588 (produced by Bacillus sp. KSM-588, FERM BP 1513); alkaline cellulase K-597 (produced by Bacillus sp. KSM-597, FERM BP 1514); alkaline cellulase K-522 (produced by Bacillus sp. KSM-522, FERM BP 1512); CMCase I, CMCase II (both produced by Bacillus sp. KSM-635, FERM BP 1485); alkaline cellulase E-ll and alkaline cellulase E-lll (both produced by Bacillus sp. KSM-522, FERM BP 1512).

Alternatively, the cellulase may be capable of colour clarification and has multiple domains, i.e. one or more catalytic domains attached to one or more non-catalytic domains, e.g. cellulose binding domains, since the activity in respect of colour clarification is enhanced by the presence of e.g. a cellulose binding domain.

This cellulase may have retaining-type activity or inverting-type activity. Preferably, the cellulase exhibits high catalytic activity on cellodextrin(s), more preferably on relatively long-chained cellodextrin(s), especially on reduced longer-chained cellodextrin(s).

In a preferred embodiment of the invention, the cellulase exhibits high catalytic activity on dyed microcrystaliine cellulose, especially on Red Avicel.

Cellulase useful as colour clarifying components in the detergent composition of the present invention usually exhibits essentially no catalytic activity on low molecular weight carbohydrate substrates. Preferably, the cellulase has a catalytic activity on low molecular weight carbohydrate sub¬ strates, especially on cellotriose, at pH 8.5 corresponding to kcat of below 0.01 s^" , more preferably the cellulase exhibits essentially no catalytic activ¬ ity on cellotriose, i.e. the component is not capable of hydrolysing cellotriose but capable of hydrolysing higher oligomers of β-1 ,4-glucose units.

A convenient cellulase useful in the detergent composition of the present invention may be an endoglucanase component which is im¬ munoreactive with an antibody raised against a highly purified ~43kD endo¬ glucanase derived from Humicola insolens, DSM 1800, or which is a homologue or derivative of the ~43kD endoglucanase exhibiting cellulase activity. A preferred endoglucanase component has the amino acid sequence disclosed in PCT Patent Application No. WO 91/17243, SEQ ID#2, which is shown in the appended SEQ ID N0:4, or a variant of said endoglucanase having an amino acid sequence being at least 60%, preferably at least 70%, more preferably 75%, more preferably at least 80%, more preferably 85%, especially at least 90% homologous with said sequence.

Another preferred endoglucanase component comprises an amino acid sequence encoded by the partial DNA sequence disclosed in PCT Patent Application No. W093/11249; SEQ ID#11, which is shown in the appended SEQ ID NO:5, or a variant of said endoglucanase having an amino acid sequence being at least 60%, preferably at least 70%, more preferably 75%, more preferably at least 80%, more preferably 85%, especially at least 90 homologous with said sequence.

Yet another preferred endoglucanase component comprises an amin acid sequence encoded by the partial DNA sequence disclosed in PC Patent Application No. WO 93/11249, SEQ ID#9, which is hereb incorporated by reference.

Yet another preferred endoglucanase component comprises an amin acid sequence encoded by the partial DNA sequence disclosed in PC Patent Application No. W093/11249, SEQ ID#7, which is hereby incorpor ated by reference. In example 1 below, the endoglucanase component i referred to as EG III.

Alternatively, the cellulase may be an endoglucanase componen which is immunoreactive with an antibody raised against a highly purifie ~60kD endoglucanase derived from Bacillus lautus, NCIMB 40250, or whic is a homologue or derivative of the ~60kD endoglucanase exhibiting cellulase activity. A preferred endoglucanase component has the amino acid sequence disclosed in PCT Patent Application No. WO 91/10732, SEQ ID#7, which is shown in the appended SEQ ID NO:6, or a variant of said endoglucanase having an amino acid sequence being at least 60%, preferably at least 70%, more preferably 75%, more preferably at least 80%, more preferably 85%, especially at least 90% homologous with said sequence.

According to the present invention the detergent composition comprises from 0.001% to 2%, preferably from 0.01% to 1%, most preferably from 0.05% to 0.5% of said 1000CEVU active cellulolytic enzyme. According to the present invention the detergent compositions comprise said polysaccharide and cellulolytic enzyme in a ratio of from 100:1 to 1 :100, preferably from 10:1 to 1:10, more preferably from 5:1 to 1:5.

Detersive Surfactants

According to the present invention the detergent composition comprises at least 1% of a surfactant system. Surfactants useful herein include the conventional C-| i-C*i8 alkyl benzene sulphonates ("LAS") and primary, branched-chain and random C10-C20 ^a,ky' sulphates ("AS"), the C10-C18 secondary (2,3) alkyl sulphates of the formula CH₃(CH₂)χ(CHOSθ3^"M⁺) CH3 and CH3 (CH₂)y(CHOS0₃ ^"M⁺) CH₂CH₃ where x and (y + 1 ) are integers of at least about 7, preferably at least about 9, and M is a water-solubilizing cation, especially sodium, unsaturated sulphates such as oleyl sulphate, the C*]n-C*i8 ^a' alkoxy sulphates ("AE_XS"; especially EO 1-7 ethoxy sulphates), C10-C18 alkyl alkoxy carboxylates (especially the EO 1-5 ethoxycarboxylates), the C10-I8 glycerol ethers, the C**o-C*i8 ^a,ky' polyglycosides and their corresponding sulphated polyglycosides, and C12-C18 alpha-sulphonated fatty acid esters.

If desired, the conventional nonionic and amphoteric surfactants such as the C12-C18 ^alky' ethoxylates ("AE") including the so-called narrow peaked alkyl ethoxylates and CQ-C-\2 ^a,ky' phenol alkoxylates (especially ethoxylates and mixed ethoxy/propoxy), C12-C18 betaines and sulphobetaines ("sultaines"), C-)o-C*i8 amine oxides, and the like, can also be included in the overall compositions. The C-jo-Cis N-alkyl polyhydroxy fatty acid amides can also be used. Typical examples include the C12- 18 N-methylglucamides. See WO 9,206,154. Other sugar-derived surfactants include the N-alkoxy polyhydroxy fatty acid amides, such as C10-C18 N-(3- methoxypropyl) glucamide. The N-propyl through N-hexyl C12-C18 glucamides can be used for iow sudsing. C10-C20 conventional soaps may also be used. If high sudsing is desired, the branched-chain C10-C-16 soaps may be used. Mixtures of anionic and nonionic surfactants are especially useful. Other conventional useful surfactants such as cationics are listed in standard texts.

According to the present invention the compositions comprise from 1% to 80%, preferably from 5% to 50%, most preferably from 10% to 40% of a surfactant. Preferred surfactants for use herein are linear alkyl benzene sulphonate, alkyl sulphates and alkyl alkoxylated nonionics or mixtures thereof. Optional ingredients

According to the present invention the detergent compositions may comprise a number of optional conventional detergent adjuncts such as builders, chelants, polymers, antiredeposition agents and the like.

Builders

Detergent builders can optionally be included in the compositions herein to assist in controlling mineral hardness. Inorganic as well as organic builders can be used. Builders are typically used in fabric laundering compositions to assist in the removal of particulate soils.

The level of builder can vary widely depending upon the end use of the composition and its desired physical form. When present, the compositions will typically comprise at least 1% builder. Liquid formulations typically comprise from 5% to 50%, more typically about 5% to 30%, by weight, of detergent builder. Granular formulations typically comprise from 10% to 80%, more typically from 15% to 50% by weight, of the detergent builder. Lower or higher levels of builder, however, are not meant to be excluded.

Inorganic or P-containing detergent builders include, but are not limited to, the alkali metal, ammonium and alkanolammonium salts of polyphosphates (exemplified by the tripolyphosphates, pyrophosphates, orthophosphates and glassy polymeric meta-phosphates), phosphonates, phytic acid, silicates, carbonates (including bicarbonates and sesquicarbonates), sulphates, and aluminosiiicates (see, for example, U.S. Patents 3,159,581 ; 3,213,030; 3,422,021 ; 3,400,148 and 3,422,137).

However, non-phosphate builders are required in some locales. Importantly, the compositions herein function surprisingly well even in the presence of the so-called "weak" builders (as compared with phosphates) such as citrate, or in the so-called "underbuilt" situation that may occur with zeolite or layered silicate builders. Examples of silicate builders are the alkali metal silicates, particularly those having a Siθ2:Na2θ ratio in the range 1.6:1 to 3.2:1 and layered silicates, such as the layered sodium silicates described in U.S. Patent 4,664,839, issued May 12, 1987 to H. P. Rieck. NaSKS-6 is the trademark for a crystalline layered silicate marketed by Hoechst (commonly abbreviated herein as "SKS-6"). Unlike zeolite builders, the Na SKS-6 silicate builder does not contain aluminum. NaSKS-6 has the delta- Na2Si2θ5 morphology form of layered silicate. It can be prepared by methods such as those described in German DE-A-3,417,649 and DE-A- 3,742,043. SKS-6 is a highly preferred layered silicate for use herein, but other such layered silicates, such as those having the general formula NaMSi_xθ2χ+ι -y^O wherein M is sodium or hydrogen, x is a number from 1.9 to 4, preferably 2, and y is a number from 0 to 20, preferably 0 can be used herein. Various other layered silicates from Hoechst include NaSKS-5, NaSKS-7 and NaSKS-11 , as the alpha, beta and gamma forms. As noted above, the delta-Na2Si2θ5 (NaSKS-6 form) is most preferred for use herein. Other silicates may also be useful such as for example magnesium silicate, which can serve as a crispening agent in granular formulations, as a stabilizing agent for oxygen bleaches, and as a component of suds control systems.

Examples of carbonate builders are the alkaline earth and alkali metal carbonates as disclosed in German Patent Application No. 2,321,001 published on November 15, 1973.

Aluminosilicate builders are useful in the present invention. Aluminosilicate builders are of great importance in most currently marketed heavy duty granular detergent compositions, and can also be a significant builder ingredient in liquid detergent formulations. Aluminosilicate builders include those having the empirical formula: _z[(Si0₂)w(zAl 2)y] H2θ wherein w, z and y are integers of at least 6, the molar ratio of z to y is in the range from 1.0 to about 0.5, and x is an integer from about 15 to about 264.

Useful aluminosilicate ion exchange materials are commercially available. These aluminosiiicates can be crystalline or amorphous in structure and can be naturally-occurring aluminosiiicates or synthetically derived. A method for producing aluminosilicate ion exchange materials is disclosed in U.S. Patent 3,985,669, Krummel, et al, issued October 12, 1976. Preferred synthetic crystalline aluminosilicate ion exchange materials useful herein are available under the designations Zeolite A, Zeolite P (B), Zeolite MAP and Zeolite X. In an especially preferred embodiment, the crystalline aluminosilicate ion exchange material has the formula: Na₁₂[(Alθ2)i2(Siθ2)i2] xH₂0 wherein x is from about 20 to about 30, especially about 27. This material is known as Zeolite A. Dehydrated zeolites (x = 0 - 10) may also be used herein. Preferably, the aluminosilicate has a particle size of about 0.1-10 microns in diameter.

Organic detergent builders suitable for the purposes of the present invention include, but are not restricted to, a wide variety of polycarboxylate compounds. As used herein, "polycarboxylate" refers to compounds having a plurality of carboxylate groups, preferably at least 3 carboxylates. Polycarboxylate builder can generally be added to the composition in acid form, but can also be added in the form of a neutralized salt. When utilized in salt form, alkali metals, such as sodium, potassium, and lithium, or alkanolammonium salts are preferred.

Included among the polycarboxylate builders are a variety of categories of useful materials. One important category of polycarboxylate builders encompasses the ether poiycarboxylates, including oxydisuccinate, as disclosed in Berg, U.S. Patent 3,128,287, issued April 7, 1964, and Lamberti et al, U.S. Patent 3,635,830, issued January 18, 1972. See also "TMS/TDS" builders of U.S. Patent 4,663,071, issued to Bush et al, on May 5, 1987. Suitable ether poiycarboxylates also include cyclic compounds, particularly aiicyclic compounds, such as those described in U.S. Patents 3,923,679; 3,835,163; 4,158,635; 4,120,874 and 4,102,903.

Other useful detergency builders include the ether hydroxypolycarboxylates, copolymers of maleic anhydride with ethylene or vinyl methyl ether, 1 , 3, 5-trihydroxy benzene-2, 4, 6-trisulphonic acid, and carboxymethyloxysuccinic acid, the various alkali metal, ammonium and substituted ammonium salts of polyacetic acids such as ethylenediamine tetraacetic acid and nitrilotriacetic acid, as well as poiycarboxylates such as meilitic acid, succinic acid, oxydisuccinic acid, polymaieic acid, benzene 1,3,5-tricarboxylic acid, carboxymethyloxysuccinic acid, and soluble salts thereof.

Citrate builders, e.g., citric acid and soluble salts thereof (particularly sodium salt), are polycarboxylate builders of particular importance for heavy duty liquid detergent formulations due to their availability from renewable resources and their biodegradabiiity. Citrates can also be used in granular compositions, especially in combination with zeolite and/or layered silicate builders. Oxydisuccinates are also especially useful in such compositions and combinations.

Also suitable in the detergent compositions of the present invention are the 3,3-dicarboxy-4-oxa-1 ,6-hexanedioates and the related compounds disclosed in U.S. Patent 4,566,984, Bush, issued January 28, 1986. Useful succinic acid builders include the C5-C20 alkyl ^and alkenyl succinic acids and salts thereof. A particularly preferred compound of this type is dodecenylsuccinic acid. Specific examples of succinate builders include: laurylsuccinate, myristylsuccinate, palmitylsuccinate, 2-dodecenylsuccinate (preferred), 2-pentadecenyisuccinate, and the like. Laurylsuccinates are the preferred builders of this group, and are described in European Patent Application 86200690.5/0,200,263, published November 5, 1986.

Other suitable poiycarboxylates are disclosed in U.S. Patent 4,144,226, Crutchfield et al, issued March 13, 1979 and in U.S. Patent 3,308,067, Diehl, issued March 7, 1967. See also Diehl U.S. Patent 3,723,322.

Fatty acids, e.g., C12-C-18 monocarboxylic acids, can also be incorporated into the compositions alone, or in combination with the aforesaid builders, especially citrate and/or the succinate builders, to provide additional builder activity. Such use of fatty acids will generally result in a diminution of sudsing, which should be taken into account by the formulator. Chelating Agents

The detergent compositions herein may also optionally contain one or more iron and/or manganese chelating agents. Such chelating agents can be selected from the group consisting of amino carboxylates, amino phosphonates, polyfunctionaliy-substituted aromatic chelating agents and mixtures therein, all as hereinafter defined. Without intending to be bound by theory, it is believed that the benefit of these materials is due in part to their exceptional ability to remove iron and manganese ions from washing solutions by formation of soluble chelates.

Amino carboxylates useful as optional chelating agents include ethylenediaminetetracetates, N-hydroxyethylethylenediaminetriacetates, nitrilotriacetates, ethylenediamine tetraproprionates, triethylenetetraamine- hexacetates, diethylenetriaminepentaacetates, and ethanoldiglycines, alkali metal, ammonium, and substituted ammonium salts therein and mixtures therein.

Amino phosphonates are also suitable for use as chelating agents in the compositions of the invention when at least low levels of total phosphorus are permitted in detergent compositions, and include ethylenediaminetetrakis (methylenephosphonates) as DEQUEST. Preferred, these amino phosphonates to not contain alkyl or alkenyl groups with more than about 6 carbon atoms.

Polyfunctionaliy-substituted aromatic chelating agents are also useful in the compositions herein. See U.S. Patent 3,812,044, issued May 21, 1974, to Connor et al. Preferred compounds of this type in acid form are dihydroxydisulfobenzenes such as 1,2-dihydroxy-3,5-disulfobenzene.

A preferred biodegradable cheiator for use herein is ethylenediamine disuccinate ("EDDS"), especially the [S,S] isomer as described in U.S. Patent 4,704,233, November 3, 1987, to Hartman and Perkins.

If utilized, these chelating agents will generally comprise from 0.1% to 10% more preferably, from 0.1% to 3.0% by weight of such compositions. Polymeric Soil Release Aoent

Any polymeric soil release agent known to those skilled in the art can optionally be employed in the compositions and processes of this invention. Polymeric soil release agents are characterized by having both hydrophilic segments, to hydrophilize the surface of hydrophobic fibers, such as polyester and nylon, and hydrophobic segments, to deposit upon hydrophobic fibers and remain adhered thereto through completion of washing and rinsing cycles and, thus, serve as an anchor for the hydrophilic segments. This can enable stains occurring subsequent to treatment with the soil release agent to be more easily cleaned in later washing procedures.

The polymeric soil release agents useful herein especially include those soil release agents having: (a) one or more nonionic hydrophile components consisting essentially of (i) polyoxyethylene segments with a degree of polymerization of at least 2, or (ii) oxypropylene or polyoxypropylene segments with a degree of polymerization of from 2 to 10, wherein said hydrophile segment does not encompass any oxypropylene unit unless it is bonded to adjacent moieties at each end by ether linkages, or (iii) a mixture of oxyalkylene units comprising oxyethylene and from 1 to about 30 oxypropylene units wherein said mixture contains a sufficient amount of oxyethylene units such that the hydrophile component has hydrophilicity great enough to increase the hydrophilicity of conventional polyester synthetic fiber surfaces upon deposit of the soil release agent on such surface, said hydrophile segments preferably comprising at least about 25% oxyethylene units and more preferably, especially for such components having about 20 to 30 oxypropylene units, at least about 50% oxyethylene units; or (b) one or more hydrophobe components comprising (i) C3 oxyalkylene terephthalate segments, wherein, if said hydrophobe components also comprise oxyethylene terephthalate, the ratio of oxyethylene terephthalate: C3 oxyalkylene terephthalate units is about 2:1 or lower, (ii) C4-C6 alkylene or oxy C4-C6 alkylene segments, or mixtures therein, or (iii) poly (vinyl ester) segments, preferably polyvinyl acetate), having a degree of polymerization of at least 2. Typically, the polyoxyethylene segments of (a)(i) will have a degree o polymerization of from about 200, although higher levels can be used, preferably from 3 to about 150, more preferably from 6 to about 100. Suitable oxy C4-C6 alkylene hydrophobe segments include, but are no limited to, end-caps of polymeric soil release agents such as Mθ3S(CH2)_nOCH2CH2θ-, where M is sodium and n is an integer from 4-6, as disclosed in U.S. Patent 4,721,580, issued January 26, 1988 to Gosselink.

Polymeric soil release agents useful in the present invention also include cellulosic derivatives such as copolymeric blocks of ethylene terephthalate or propylene terephthalate with polyethylene oxide or polypropylene oxide terephthalate, and the like.

Soil release agents characterized by poly(vinyl ester) hydrophobe segments include graft copolymers of poly(vinyi ester), e.g., C*|-C6 vinyl esters, preferably poly(vinyl acetate) grafted onto polyalkylene oxide backbones, such as polyethylene oxide backbones. See European Patent Application 0219 048, published April 22, 1987 by Kud, et al. Commercially available soil release agents of this kind include the SOKALAN type of material, e.g., SOKALAN HP-22, available from BASF (West Germany).

One type of preferred soil release agent is a copolymer having random blocks of ethylene terephthalate and polyethylene oxide (PEO) terephthalate. The molecular weight of this polymeric soil release agent is in the range of from about 25,000 to about 55,000. See U.S. Patent 3,959,230 to Hays, issued May 25, 1976 and U.S. Patent 3,893,929 to Basadur issued July 8, 1975.

Another preferred polymeric soil release agent is a polyester with repeat units of ethylene terephthalate units contains 10-15% by weight of ethylene terephthalate units together with 90-80% by weight of polyoxyethylene terephthalate units, derived from a polyoxyethylene glycol of average molecular weight 300-5,000. Examples of this polymer include the commercially available material ZELCON 5126 (from Dupont) and MILEASE T (from ICI). See also U.S. Patent 4,702,857, issued October 27, 1987 to Gosselink. Another preferred polymeric soil release agent is a sulfonated product of a substantially linear ester oligomer comprised of an oligomeric ester backbone of terephthaloyl and oxyalkyleneoxy repeat units and terminal moieties covalently attached to the backbone. These soil release agents are described fully in U.S. Patent 4,968,451, issued November 6, 1990 to J.J. Scheibel and E.P. Gosselink. Other suitable polymeric soil release agents include the terephthalate polyesters of U.S. Patent 4,711,730, issued December 8, 1987 to Gosselink et al, the anionic end-capped oligomeric esters of U.S. Patent 4,721,580, issued January 26, 1988 to Gosselink, and the block polyester oligomeric compounds of U.S. Patent 4,702,857, issued October 27, 1987 to Gosselink.

Preferred polymeric soil release agents also include the soil release agents of U.S. Patent 4,877,896, issued October 31 , 1989 to Maldonado et al, which discloses anionic, especially sulfoarolyl, end-capped terephthalate esters.

if utilized, soil release agents will generally comprise from about 0.01 % to about 10.0%, by weight, of the detergent compositions herein, typically from about 0.1% to about 5%, preferably from about 0.2% to about 3.0%.

Still another preferred soil release agent is an oligomer with repeat units of terephthaloyl units, sulfoisoterephthaloyl units, oxyethyleneoxy and oxy-1 ,2-propylene units. The repeat units form the backbone of the oligomer and are preferably terminated with modified isethionate end-caps. A particularly preferred soil release agent of this type comprises about one sulfoisophthaloyl unit, 5 terephthaloyl units, oxyethyleneoxy and oxy-1 ,2- propyleneoxy units in a ratio of from about 1.7 to about 1.8, and two end-cap units of sodium 2-(2-hydroxyethoxy)-ethanesuifonate. Said soil release agent also comprises from about 0.5% to about 20%, by weight of the oligomer, of a crystalline-reducing stabilizer, preferably selected from the group consisting of xylene sulfonate, cumene sulfonate, toluene sulfonate, and mixtures thereof.

As a practical matter, and not by way of limitation, the compositions and processes herein can be adjusted to provide on the order of at least one part per ten million of the active bleach catalyst species in the aqueou washing liquor, and will preferably provide from about 0.1 ppm to about 70 ppm, more preferably from about 1 ppm to about 500 ppm, of the catalys species in the laundry liquor.

Bleaching Compounds - Bleaching Agents and Bleach Activators

The detergent compositions herein may optionally contain bleachin agents or bleaching compositions containing a bleaching agent and one o more bleach activators. When present, bleaching agents will typically be a levels of from 1% to 40%, more typically from 5% to 30%, of the detergen composition, especially for fabric laundering. If present, the amount o bleach activators will typically be from 0.1% to 60%, more typically from 0.5% to 40% of the bleaching composition comprising the bleaching agent plus-bleach activator.

The bleaching agents used herein can be any of the bleaching agents useful for detergent compositions in textile cleaning, hard surface cleaning, or other cleaning purposes that are now known or become known. These include oxygen bleaches as well as other bleaching agents.

Peroxygen bleaching agents can also be used. Suitable peroxygen bleaching compounds include sodium carbonate peroxyhydrate and equivalent "percarbonate" bleaches, sodium pyrophosphate peroxyhydrate, urea peroxyhydrate, and sodium peroxide. Persulfate bleach (e.g., OXONE, manufactured commercially by DuPont) can also be used.

A preferred percarbonate bleach comprises dry particles having an average particle size in the range from about 500 micrometers to about 1,000 micrometers, not more than about 10% by weight of said particles being smaller than about 200 micrometers and not more than about 10% by weight of said particles being larger than about 1,250 micrometers. Optionally, the percarbonate can be coated with silicate, borate or water- soluble surfactants. Preferred coatings are based on carbonate/sulphate mixtures. Percarbonate is available from various commercial sources such as FMC, Solvay and Tokai Denka. Another category of bleaching agent that can be used without restriction encompasses percarboxylic acid bleaching agents and salts thereof. Suitable examples of this class of agents include magnesium monoperoxyphthalate hexahydrate, the magnesium salt of metachloro perbenzoic acid, 4-nonylamino-4-oxoperoxybutyric acid and diperoxydodecanedioic acid. Such bleaching agents are disclosed in U.S. Patent 4,483,781, Hartman, issued November 20, 1984, U.S. Patent Application 740,446, Burns et al, filed June 3, 1985, European Patent Application 0,133,354, Banks et al, published February 20, 1985, and U.S. Patent 4,412,934, Chung et al, issued November 1, 1983. Highly preferred bleaching agents also include 6-nonylamino-6-oxoperoxycaproic acid as described in U.S. Patent 4,634,551 , issued January 6, 1987 to Burns et al.

Mixtures of bleaching agents can also be used. Peroxygen bleaching agents, the perborates, e.g., sodium perborate (e.g., mono- or tetra-hydrate) , the percarbonates, etc., are preferably combined with bleach activators, which lead to the in situ production in aqueous solution (i.e., during the washing process) of the peroxy acid corresponding to the bleach activator. Various nonlimiting examples of activators are disclosed in U.S. Patent 4,915,854, issued April 10, 1990 to Mao et al, and U.S. Patent 4,412,934. The nonanoyloxybenzene sulfonate (NOBS) and tetraacetyl ethylene diamine (TAED) activators are typical, and mixtures thereof can also be used. See also U.S. 4,634,551 for other typical bleaches and activators useful herein.

Highly preferred amido-derived bleach activators are those of the formulae:

R¹ N(R5)C(0)R²C(0)L or R C(0)N(R5)R2C(0)L wherein R^"- is an alkyl group containing from about 6 to about 12 carbon atoms, R2 is an alkylene containing from 1 to about 6 carbon atoms, R^ is H or alkyl, ary I, or alkaryl containing from about 1 to about 10 carbon atoms, and L is any suitable leaving group. A leaving group is any group that is displaced from the bleach activator as a consequence of the nucleophilic attack on the bleach activator by the perhydroxyl anion. A preferred leaving group is phenol sulfonate. Preferred examples of bleach activators of the above formula include (6-octanamido-caproyl)oxybenzenesulfonate, ( nonanamidocaproyl)- oxybenzenesulfonate, (6-decanamido caproyl)oxybenzenesulfonate, and mixtures thereof as described in U. Patent 4,634,551 , incorporated herein by reference.

Another class of bleach activators comprises the benzoxazin-typ activators disclosed by Hodge et al in U.S. Patent 4,966,723, issue October 30, 1990, incorporated herein by reference. A highly preferre activator of the benzoxazin-type is:

Still another class of preferred bleach activators includes the acy lactam activators, especially acyl caprolactams and acyl valerolactams o the formulae:

wherein R6 is H or an alkyl, aryl, alkoxyaryl, or alkaryl group containing fro 1 to about 12 carbon atoms. Highly preferred lactam activators includ benzoyl caprolactam, octanoyl caprolactam, 3,5,5-trimethylhexanoy caprolactam, nonanoyl caprolactam, decanoyl caprolactam, undecenoyl caprolactam, benzoyl valerolactam, octanoyl vaierolactam, decanoyl valerolactam, undecenoyl valerolactam, nonanoyl valerolactam, 3,5,5 trimethylhexanoyl valerolactam and mixtures thereof. See also U.S. Patent 4,545,784, issued to Sanderson, October 8, 1985, incorporated herein by reference, which discloses acyl caprolactams, adsorbed into sodium perborate. Other preferred activators are cationic bleach activators.

Bleaching agents other than oxygen bleaching agents are also known in the art and can be utilized herein. One type of non-oxygen bleaching agent of particular interest includes photoactivated bleaching agents such as the sulfonated zinc and/or aluminum phthalocyanines. See U.S. Patent 4,033,718, issued July 5, 1977 to Holcombe et al. If used, detergent compositions will typically contain from 0.025% to 1.25%, by weight, of such bleaches, especially sulfonate zinc phthalocyanine.

If desired, the bleaching compounds can be catalyzed by means of a manganese compound. Such compounds are well known in the art and include, for example, the manganese-based catalysts disclosed in U.S. Pat. 5,246,621, U.S. Pat. 5,244,594; U.S. Pat. 5,194,416; U.S. Pat. 5,114,606; and European Pat. App. Pub. Nos. 549,271 A1, 549,272A1, 544,440A2, and 544.490A1 ; Preferred examples of these catalysts include Mn'^u- 0)3(1 ,4,7-trimethy ,4,7-triazacyclononane)2(PF6)2. Mn"-2(u-0)ι (u-

OAc)2(1 ,4,7-trimethyl-1 ,4,7-triazacyclononane)2-(Clθ4)2, Mn'^V4(u-

0)6(1 ,4,7-triazacyclononane)4(Clθ4)4, Mn^,,lMn^, 4(u-0)ι (u-OAc)2-(1 ,4,7- trimethyM ,4,7-triazacyclononane)2(CI04)3, Mn'^v(1 ,4,7-trimethyl-1 ,4,7- triazacyclononane)- (OCH3)3(PF6), and mixtures thereof. Other metal- based bleach catalysts include those disclosed in U.S. Pat. 4,430,243 and U.S. Pat. 5,114,611. The use of manganese with various complex ligands to enhance bleaching is also reported in the following United States Patents: 4,728,455; 5,284,944; 5,246,612; 5,256,779; 5,280,117; 5,274,147; 5,153,161; 5,227,084;

Polymeric Dispersing Agents

Polymeric dispersing agents can advantageously be utilized at levels from 0.1% to 7%, by weight, in the compositions herein, especially in the presence of zeolite and/or layered silicate builders. Suitable polymeric dispersing agents include polymeric poiycarboxylates and polyethylene glycols, although others known in the art can also be used. It is believed, though it is not intended to be limited by theory, that polymeric dispersing agents enhance overall detergent builder performance, when used in combination with other builders (including lower molecular weight poiycarboxylates) by crystal growth inhibition, particulate soil release peptization, and anti-redeposition.

Polymeric polycarboxylate materials can be prepared by polymerizing or copolymerizing suitable unsaturated monomers, preferably in their acid form. Unsaturated monomeric acids that can be polymerized to form suitable polymeric poiycarboxylates include acrylic acid, maleic acid (or malei anhydride), fumaric acid, itaconic acid, aconitic acid, mesaconic aci citraconic acid and methylenemalonic acid. The presence in the polymeri poiycarboxylates herein or monomeric segments, containing no carboxylat radicals such as vinylmethyl ether, styrene, ethylene, etc. is suitabl provided that such segments do not constitute more than about 40% b weight.

Particularly suitable polymeric poiycarboxylates can be derived fro acrylic acid. Such acrylic acid-based polymers which are useful herein ar the water-soluble salts of polymerized acrylic acid. The average molecula weight of such polymers in the acid form preferably ranges from about 2,00 to 10,000, more preferably from about 4,000 to 7,000 and most preferabl from about 4,000 to 5,000. Water-soluble salts of such acrylic acid polymer can include, for example, the alkali metal, ammonium and substitute ammonium salts. Soluble polymers of this type are known materials. Use o poiyacrylates of this type in detergent compositions has been disclosed, fo example, in Diehl, U.S. Patent 3,308,067, issued march 7, 1967.

Acrylic ma leic-based copolymers may also be used as a preferre component of the dispersing/anti-redeposition agent. Such materials includ the water-soluble salts of copolymers of acrylic acid and maleic acid. Th average molecular weight of such copolymers in the acid form preferabl ranges from about 2,000 to 100,000, more preferably from about 5,000 t 75,000, most preferably from about 7,000 to 65,000. The ratio of acrylate t maleate segments in such copolymers will generally range from about 30:1 to about 1:1 , more preferably from about 70:30 to 30:70. Water-soluble salts of such acrylic acid/maleic acid copolymers can include, for example, the alkali metal, ammonium and substituted ammonium salts. Soluble acrylate/maleate copolymers of this type are known materials which are described in European Patent Application No. 66915, published December 15, 1982, as well as in EP 193,360, published September 3, 1986, which also describes such polymers comprising hydroxypropylacrylate. Still other useful dispersing agents include the ma leic acry lie/vinyl alcohol or acetate terpoiymers. Such materials are also disclosed in EP 193,360, including, for example, the 45/45/10 terpolymer of acrylic/maleic/vinyl alcohol. Another polymeric material which can be included is polyethylene glycol (PEG). PEG can exhibit dispersing agent performance as well as act as a clay soil removal-antiredeposition agent. Typical molecular weight ranges for these purposes range from about 500 to about 100,000, preferably from about 1,000 to about 50,000, more preferably from about 1 ,500 to about 10,000.

Polyamino acid dispersing agents such as polyaspartate and polyglutamatemay also be used, especially in conjunction with zeolite builders. Dispersing agents such as polyaspartate preferably have a molecular weight (avg.) of about 10,000.

Dve Transfer Inhibiting Agents

The compositions of the present invention may also include one or more materials effective for inhibiting the transfer of dyes from one fabric to another during the cleaning process. Generally, such dye transfer inhibiting agents include polyvinyl pyrrolidone polymers, polyamine N-oxide polymers, copolymers of N-vinylpyrrolidone and N-vinylimidazoie, manganese phthalocyanine, peroxidases, and mixtures thereof. If used, these agents typically comprise from 0.01% to 10% by weight of the composition, preferably from 0.01 % to 5%, and more preferably from 0.05% to 2%.

More specifically, the polyamine N-oxide polymers preferred for use herein contain units having the following structural formula: R-A -P; wherein P is a poiymerizable unit to which an N-O group can be attached or the N-O group can form part of the poiymerizable unit or the N-O group can be attached to both units; A is one of the following structures: -NC(O)-, -C(0)0-, -S-, -0-, -N=; x is 0 or 1 ; and R is aliphatic, ethoxylated aliphatics, aromatics, heterocyclic or alicyclic groups or any combination thereof to which the nitrogen of the N-O group can be attached or the N-O group is part of these groups. Preferred polyamine N-oxides are those wherein R is a heterocyclic group such as pyridine, pyrrole, imidazole, pyrrolidine, piperidine and derivatives thereof. The N-O group can be represented by the following genera structures:

wherein R-j, R2, R3 are aliphatic, aromatic, heterocyclic or alicyclic group or combinations thereof; x, y and z are 0 or 1 ; and the nitrogen of the N-O group can be attached or form part of any of the aforementioned groups. The amine oxide unit of the polyamine N-oxides has a pKa <10, preferably pKa <7, more preferred pKa <6.

Any polymer backbone can be used as long as the amine oxide polymer formed is water-soluble and has dye transfer inhibiting properties. Examples of suitable polymeric backbones are polyvinyls, polyalkylenes, polyesters, polyethers, polyamide, polyimides, polyacrylates and mixtures thereof. These polymers include random or block copolymers where one monomer type is an amine N-oxide and the other monomer type is an N- oxide. The amine N-oxide polymers typically have a ratio of amine to the amine N-oxide of 10:1 to 1:1,000,000. However, the number of amine oxide groups present in the polyamine oxide polymer can be varied by appropriate copolymerization or by an appropriate degree of N-oxidation. The polyamine oxides can be obtained in almost any degree of polymerization. Typically, the average molecular weight is within the range of 500 to 1,000,000; more preferred 1,000 to 500,000; most preferred 5,000 to 100,000. This preferred class of materials can be referred to as "PVNO".

The most preferred polyamine N-oxide useful in the detergent compositions herein is poly(4-vinylpyridine-N-oxide) which as an average molecular weight of about 50,000 and an amine to amine N-oxide ratio of about 1 :4.

Copolymers of N-vinylpyrrolidone and N-vinylimidazole polymers (referred to as a class as "PVPVI") are also preferred for use herein. Preferably the PVPVI has an average molecular weight range from 5,000 to 1,000,000, more preferably from 5,000 to 200,000, and most preferably from 10,000 to 20,000. (The average molecular weight range is determined by light scattering as described in Barth, et al., Chemical Analysis. Vol 113. "Modem Methods of Polymer Characterization", the disclosures of which are incorporated herein by reference.) The PVPVI copolymers typically have a molar ratio of N-vinylimidazole to N-vinylpyrrolidone from 1 :1 to 0.2:1, more preferably from 0.8:1 to 0.3:1, most preferably from 0.6:1 to 0.4:1. These copolymers can be either linear or branched.

The present invention compositions also may employ a polyvinylpyrrolidone ("PVP") having an average molecular weight of from about 5,000 to about 400,000, preferably from about 5,000 to about 200,000, and more preferably from about 5,000 to about 50,000. PVP's are known to persons skilled in the detergent field; see, for example, EP-A- 262,897 and EP-A-256,696, incorporated herein by reference. Compositions containing PVP can also contain polyethylene glycol ("PEG") having an average molecular weight from about 500 to about 100,000, preferably from about 1,000 to about 10,000. Preferably, the ratio of PEG to PVP on a ppm basis delivered in wash solutions is from about 2:1 to about 50:1 , and more preferably from about 3:1 to about 10:1.

The detergent compositions herein may also optionally contain from 0.005% to 5% by weight of certain types of hydrophilic optical brighteners which also provide a dye transfer inhibition action. If used, the compositions herein will preferably comprise from 0.01% to 1% by weight of such optical brighteners.

The hydrophilic optical brighteners useful in the present invention are those having the structural formula:

wherein R-j is selected from anilino, N-2-bis-hydroxyethyl and NH-2- hydroxyethyl; R2 is selected from N-2-bis-hydroxyethyl, N-2-hydroxyethyl-N- methylamino, morphilino, chloro and amino; and M is a salt-forming cation such as sodium or potassium. When in the above formula, R-j is aniiino, R2 is N-2-bis-hydroxyethy and M is a cation such as sodium, the brightener is 4,4',-bis[(4-aniiino-6-(N 2-bis-hydroxyethyl)-s-triazine-2-yl)amino]-2,2^,-stilbenedisulfonic acid an disodium salt. This particular brightener species is commercially marketed under the tradename Tinopal-UNPA-GX by Ciba-Geigy Corporation. Tinopal-UNPA-GX is the preferred hydrophilic optical brightener useful in the detergent compositions herein.

When in the above formula, R-j is aniiino, R2 is N-2-hydroxyethyl-N- 2-methylamino and M is a cation such as sodium, the brightener is 4,4'- bis[(4-anilino-6-(N-2-hydroxyethyl-N-methylamino)-s-triazine-2-yl)amino]2,2'- stilbenedisulfonic acid disodium salt. This particular brightener species is commercially marketed under the tradename Tinopal 5BM-GX by Ciba- Geigy Corporation.

When in the above formula, R-) is aniiino, R2 is morphilino and M is a cation such as sodium, the brightener is 4,4'-bis[(4-anilino-6-morphilino-s- triazine-2-yl)amino]2,2'-stilbenedisulfonic acid, sodium salt. This particular brightener species is commercially marketed under the tradename Tinopal AMS-GX by Ciba Geigy Corporation.

The specific optical brightener species selected for use in the present invention provide especially effective dye transfer inhibition performance benefits when used in combination with the selected polymeric dye transfer inhibiting agents hereinbefore described. The combination of such selected polymeric materials (e.g., PVNO and/or PVPVI) with such selected optical brighteners (e.g., Tinopal UNPA-GX, Tinopal 5BM-GX and/or Tinopal AMS- GX) provides significantly better dye transfer inhibition in aqueous wash solutions than does either of these two detergent composition components when used alone. Without being bound by theory, it is believed that such brighteners work this way because they have high affinity for fabrics in the wash solution and therefore deposit relatively quick on these fabrics. The extent to which brighteners deposit on fabrics in the wash solution can be defined by a parameter called the "exhaustion coefficient". The exhaustion coefficient is in general as the ratio of a) the brightener material deposited on fabric to b) the initial brightener concentration in the wash liquor. Brighteners with relatively high exhaustion coefficients are the most suitable for inhibiting dye transfer in the context of the present invention.

Of course, it will be appreciated that other, conventional optical brightener types of compounds can optionally be used in the present compositions to provide conventional fabric "brightness" benefits, rather than a true dye transfer inhibiting effect. Such usage is conventional and well-known to detergent formulations.

According to the present invention the detergent composition may comprise any other ingredients commonly employed in conventional detergent compositions such as soaps, suds suppressors, softeners, brighteners, additional enzymes and enzyme stabilisers.

Use of the combination of nonionic polysaccharide ethers and cellulase enzymes

The compositions of the present invention may be used in laundry detergent compositions, fabric treatment compositions and fabric softening compositions in addition to hard surface cleaners. The compositions may be formulated as conventional granules, bars, pastes or powder or non aqueous liquid forms. The detergent compositions are manufactured in conventional manner, for example in the case of powdered detergent compositions, spray drying or spray mixing processes may be utilised.

The polysaccharide ether and cellulase enzyme combination of the present invention are present at aqueous concentrations of from 1ppm to 300ppm, preferably from 5ppm to 100ppm in the wash solution, preferably at a pH of from 7 to 11 , more preferably from 9 to 10.5.

The present invention also relates to a method of laundering fabrics which comprises contacting said fabric with an aqueous laundry liquor containing conventional detersive ingredients described herein in addition to the cellulolytic enzyme and nonionic polysaccharide ether of the present invention. In a preferred method polyester and polyester-cotton blends and other synthetic fabrics are used. The most preferred method for simultaneously cleaning and soil release treatment is a "multi-cycle" method, whereby the best results are obtained after two or more cycle comprising the steps of: a) contacting said fabric with said aqueous laundry liquor in a conventiona automatic washing machine or by hand washing for periods of from about 5 minutes to about 1 hour; b) rinsing said fabrics with water c) line- or tumble drying said fabrics; and d) exposing said fabrics to soiling through normal wear or domestic use.

Examples

Abbreviations used in Examples

In the detergent compositions, the abbreviated component identifications have the following meanings:

XYAS Sodium C*ιχ - C** y alkyl sulphate

25EY A C 12-15 predominantly linear primary alcohol condensed with an average of Y moles of ethylene oxide

XYEZ A C*iχ - C-jy predominantly linear primary alcohol condensed with an average of Z moles of ethylene oxide

XYEZS C X " CΪY sodium alkyl sulphate condensed with an average of Z moles of ethylene oxide per mole

TFAA C*i6-C*i8 ^a'^ky' N-methyl glucamide.

Silicate Amorphous Sodium Silicate (Siθ2:Na2θ ratio = 2.0) NaSKS-6 Crystalline layered silicate of formula δ- Na2Si2θ5

Carbonate Anhydrous sodium carbonate

MA/AA Copolymer of 30:70 maleic/acrylic acid, average molecular weight about 70,000.

Zeolite A Hydrated Sodium Aluminosilicate of formula Na*]2(A1 θ2Siθ2)i2 27H20 having a primary particle size in the range from 1 to 10 micrometers

Citrate Tri-sodium citrate dihydrate

Percarbonate Anhydrous sodium percarbonate bleach coated with a coating of sodium silicate (Si2θ:Na2θ ratio = 2:1 ) at a weight ratio of percarbonate to sodium silicate of 39:1

CMC Sodium carboxymethyl cellulose

DETPMP Diethylene triamine penta (Methylene phosphonic acid), marketed by Monsanto under the Tradename Dequest 2060

PVNO Poly (4-vinylpyridine)-N-oxide copolymer of vinylimidazole and vinylpyrrolidone having an average molecular weight of 10,000.

Smectite Clay Calcium montmorillonite ex. Colin Stewart Minchem Ltd.

Granular Suds : 12% Silicone/silica, 18% stearyl Suppressor alcohol, 70% starch in granular form LAS Sodium linear C**2 alkyl benzene sulphonate

TAS Sodium tallow alkyl sulphate

SS Secondary soap surfactant of formula 2- butyl octanoic acid

Phosphate Sodium tripolyphosphate

TAED Tetraacetyl ethylene diamine

PVP Polyvinyl pyrrolidone polymer

HMWPEO High molecular weight polyethylene oxide

MC1 Methyl cellulose ether with dp = 650, ds=1.8 available from Shin Etsu Chemicals

MC2 Methyl cellulose ether (Methol 60 HG) obtained from Fluka, with a dp >100 and ds >1

HPMC Hydroxypropyl methylcellulose ether with dp= 300-350, 28-30% methoxyl content Cellulase Cellulolytic enzyme sold under the tradename of Carezyme or Celluzyme by Novo Nordisk A/S

TAE 25 Tallow alcohol ethoxylate (25)

Example 1 The following laundry detergent compositions A, B, C, D and E were prepared.

A B C D E

45AS/25AS (3:1) 9.1 9.1 9.1 9.1 9.1

35AE3S 2.3 2.3 2.3 2.3 2.3

Example 2

Granular fabric cleaning compositions in accord with the invention are prepared as follows:

1 II

Cellulase (1000CEVU) 0.2 0.1

MC1 0.75 -

HPMC - 0.5

LAS 22.0 22.0

Phosphate 23.0 23.0

Carbonate 23.0 23.0

Silicate 14.0 14.0

Zeolite A 8.2 8.2

DETPMP 0.4 0.4

Sodium Sulfate 5.5 5.5

Water/minors Up to 100% Example 3

Granular fabric cleaning compositions in accord with the invention are prepared as follows:

I II

LAS 12.0 12.0

Zeolite A 26.0 26.0

SS 4.0 4.0

24AS 5.0 5.0

Citrate 5.0 5.0

Sodium Sulfate 17.0 17.0

Perborate 16.0 16.0

TAED 5.0 5.0

HPMC 0.3 0.5

MC1 0.75 -

Cellulase (1000CEVU) 0.1 0.3

Water/minors Up to 100%

Example 4

Granular fabric cleaning compositions in accord with the invention which are especially useful in the laundering of coloured fabrics are prepared as follows:

I II III IV V VI

LAS 11.4 10.7 11.4 10.7 - -

TAS 1.8 2.4 1.8 2.4 - -

TFAA - - - - 4.0 4.0

45AS 3.0 3.1 3.0 3.1 10.0 10.0

45E7 4.0 4.0 4.0 4.0 - -

25E3S - - - - 3.0 3.0

68E11 1.8 1.8 1.8 1.8 - -

25E5 - - - - 8.0 8.0

Citrate 14.0 15.0 14.0 15.0 7.0 7.0

Carbonate - - - - 10 10

Citric acid 3.0 2.5 3.0 2.5 3.0 3.0

Zeolite A 32.5 32.1 32.5 32.1 25.0 25.0 Na-SKS-6 - - - - 9.0 9.0

MA/AA 5.0 5.0 5.0 5.0 5.0 5.0

DETPMP 1.0 0.2 1.0 0.2 0.8 0.8

HPMC - - 0.5 - 0.5 -

MC1 0.75 0.75 - 0.75 - 0.75

Cellulase 0.1 0.15 0.3 0.2 0.05 0.5

(1000CEVU)

Silicate 2.0 2.5 2.0 2.5 - -

Sulphate 3.5 5.2 3.5 5.2 3.0 3.0

PVP 0.3 0.5 0.3 0.5 - -

Poly(4-vinyl - - - - 0.2 0.2 pyridine)-N- oxide/copoly mer of vinyl- imidazole & vinyl- pyrrolidone

Perborate 0.5 1.0 0.5 1.0 - -

Phenol 0.1 0.2 0.1 0.2 - - sulfonate

Water/Minor Up to s 100%

Example 5

Granular fabric cleaning compositions in accord with the invention are prepared as follows:

I II

LAS 6.5 8.0

Sulfate 15.0 18.0

Zeolite A 26.0 22.0

Sodium nitrilotriacetate 5.0 5.0

PVP 0.5 0.7

TAED 3.0 3.0

Boric acid 4.0 -

Perborate 0.5 1.0

Phenol sulphonate 0.1 - HPMC 0.5 -

MC1 - 0.75

Cellulase (1000CEVU) 0.1 0.2

Silicate 5.0 5.0

Carbonate 15.0 15.0 Water/minors Up to 100%

Example 6

A granular fabric cleaning compositions in accord with the inventio which provide "softening through the wash" capability are prepared a follows:

I II III IV

45AS - - 10.0 10.0

LAS 7.6 7.6 - -

68AS 1.3 1.3 - -

45E7 4.0 4.0 - -

25E3 - - 5.0 5.0

Coco-alkyl-dimethyl 1.4 1.4 1.0 1.0 hydroxy¬ ethyl ammonium chloride

Citrate 5.0 5.0 3.0 3.0

Na-SKS-6 - - 11.0 11.0

Zeolite A 15.0 15.0 15.0 15.0

MA/AA 4.0 4.0 4.0 4.0

DETPMP 0.4 0.4 0.4 0.4

Perborate 15.0 15.0 - -

Percarbonate - - 15.0 15.0

TAED 5.0 5.0 5.0 5.0

Smectite clay 10.0 10.0 10.0 10.0

HMWPEO - - 0.1 0.1

HPMC - 0.5 - 0.5

MC1 0.75 - 0.75 -

Cellulase (1000CEVU) 0.1 0.2 0.05 0.37

Silicate 3.0 3.0 5.0 5.0

Carbonate 10.0 10.0 10.0 10.0

Granular suds suppressor 1.0 1.0 4.0 4.0 CMC 0.2 0.2 0.1 0.1 Water/minors Up to 100%

What is claimed is.

Claims

1. A detergent composition comprising at least 1 % of a surfactant system, characterised in that said system comprises a nonionic polysaccharid ether having a 1,4 β-glucosidic bond, a degree of polymerisation o 100 or more and a degree of subsitution of from 0.5 to 2.8 inclusive o mixtures thereof, in combination with a cellulolytic enzyme.

2. A detergent composition according to claim 1 , wherein said nonioni polysaccharide ether has a degree of substitution of from 0.5 to 2.2.

3. A detergent composition according to either of claims 1 or 2, wherein said nonionic polysaccharide ether is selected from nonionic C1-C4 alkyl-, C1-C4 hydroxyalkyl-, C1-C4 alkylhydroxyalkyl cellulose ethers and mixtures thereof.

4. A detergent composition according to any of the preceding claims, wherein said nonionic polysaccharide ether is a methyl cellulose ether.

5. A detergent composition according to any of the preceding claims, wherein said cellulolytic enzyme is a fungal or bacterial cellulolytic enzyme.

6. A detergent composition according to any of the preceding claims, wherein said cellulolytic enzyme is derivable from a strain of Humicola. Bactillus. Trichoderma. Fusarium. Mvcelioohthora. Phanerochaete. Schizophyllum. Penicillium. Aspergillus. or Geotricum.

7. A detergent copomisiton according to any of the preceding claims, wherein the cellulolytic enzyme is a endoglucanase which is immunoreactive with antibody raised against a highly purified -43kD endoglucanase derived from Humicola insolens, DMS 1800, or which is a derivative of the 43kD endoglucanase exhibiting celullolytic enzyme activity.

8. A detergent composition according to any of the preceding claims, wherein the ratio of said cellulolytic enzyme to said nonionic polysaccharide ether is from 1:100 to 100:1.

9. A detergent composition according to any of the preceding claims, wherein said cellulolytic enzyme is present in a concentration in the wash liquor of from 0.001 mg to 100mg of cellulolytic enzyme per litre of washing solution.

10. A detergent composition according to any of the preceding claims, wherein said detergent composition comprises from 0.001% to 2% of said 1000CEVU active cellulolytic enzyme.

11. A detergent composition according to any of the preceding claims, wherein detergent conposition comprises from 0.01% to 10% of said nonionic polysaccharide ether.

12. A detergent composition according to any of the preceding claims, comprising from 1% to 80% of said surfactant system, wherein said surfactants are selected from anionic, nonionic, zwitterionic, amphoteric surfactants and mixtures thereof.

13. A method of treating fabrics comprising contacting said fabrics with an aqueous liquor comprising from 1ppm to 300ppm of said combination of cellulolytic enzyme and nonionic polysaccharide ether.