JP2000103724A - Cationic polymer that gives excellent conditioning properties to hair cosmetics - Google Patents

Abstract

(57) [Summary] PROBLEM TO BE SOLVED: To provide a hair cosmetic with a smooth foam feeling at the time of use, a smooth smooth finger passage at the time of rinsing, and an excellent conditioning property with a less stiff feeling after drying. Providing a cationic polymer to be provided. SOLUTION: In galactomannan in which a galactose unit is contained as a side chain in a main chain having mannose as a constitutional unit, the composition ratio of mannose to galactose is 4: 1.
And cationically modified locust bean gum having a nitrogen content of 0.2 to 3% by weight. The cationic polymer gives excellent conditioning properties to hair cosmetics.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cation which gives a smooth foam feeling when used, gives a smooth and smooth finger passage to the hair when rinsing, and gives a good finish without a squeaky feeling after drying. The present invention relates to a cationic polymer comprising a modified locust bean gum, which imparts excellent conditioning properties to hair cosmetics.

[0002]

2. Description of the Related Art Water-soluble polymers obtained by introducing quaternary nitrogen into polysaccharides such as cellulose derivatives and starch have been used as cationic polymers that impart conditioning properties to hair cosmetics. For example, Japanese Patent Publication No. 47-20635 discloses a cellulose derivative in which quaternary nitrogen is introduced into shampoos and hair cosmetics. Japanese Patent Publication No. 60-42761 discloses a cation-modified starch into which quaternary nitrogen is introduced.
No. 7491 discloses a cation-modified guar gum into which quaternary nitrogen is introduced, which is used for hair care products such as shampoos and rinses.

[0003]

The cation-modified cellulose forms a complex salt with an anionic surfactant during hair washing and is adsorbed on the hair, showing an excellent conditioning effect at the time of rinsing. There is a problem that the feeling becomes worse. In addition, the cation-modified guar gum has a problem that although it has little feeling of dryness after drying, the amount of adsorption is small and the conditioning effect at the time of rinsing is weak.

[0004]

Under these circumstances, the present invention has been intensively studied in order to improve the stiffness of the conventional cationic polymer during drying and the weak conditioning effect during rinsing. The inventors have found that a cationic polymer having a specific amount of a quaternary nitrogen-containing group as a base material can be suitable for this purpose, and have completed the present invention.

[0005] The locust bean gum used in the present invention is a nonionic polysaccharide in which a galactose unit is constituted as a side chain in a main chain having mannose as a constitutional unit, and the composition ratio of mannose to galactose is 4: 1. Caratonia
It is a natural water-soluble gum obtained from perennial legumes called Silica. It is a well-known fact that this locust bean gum has a different aqueous solution rheology from guar gum, a nonionic polysaccharide having a composition ratio of mannose to galactose of 2: 1.

[0006] The cation-modified locust bean gum according to the present invention is characterized in that the locust bean gum contains a quaternary nitrogen-containing group such as a glycidyltrialkylammonium salt or a 3-halogeno-2-hydroxypropyltrialkylammonium salt. The reaction can be carried out so that the content is 0.2 to 3% by weight.
In this case, the reaction is carried out in a suitable solvent, preferably aqueous alcohol, in the presence of an alkali. Such a quaternary nitrogen-containing group can be introduced according to a conventionally known method.

In the present invention, the quaternary nitrogen-containing group represented by the above formula (1) introduced into locust bean gum has
Specific examples of 1, R2 and R3 include methyl, ethyl and propyl, and a methyl group is particularly preferred. Specific examples of the anion X- include halogen atoms such as chlorine, bromine and iodine, and methyl sulfate and ethyl sulfate.

[0008] If the content of nitrogen introduced by the cationization reaction of the cation-modified locust bean gum used in the present invention is less than 0.2% by weight, the amount adsorbed on hair and skin becomes insufficient, and in fact shampoos, rinses,
No effect is recognized even when blended in a cream or the like. On the other hand, when the nitrogen content exceeds 3% by weight, not only a sticky feeling is caused at the time of use and the use feeling is deteriorated, but also the finished feeling after use is not improved as expected, which is not preferable.

The amount of the cationically modified locust bean gum of the present invention to be added to the cosmetic for hair is preferably 0.1 to 5% by weight, and if it is less than 0.1% by weight, the effect is not sufficiently exhibited, and it exceeds 5% by weight. When used, a sticky feeling is caused and the feeling of use is deteriorated.

The hair cosmetic of the present invention can be obtained by blending the cationic modified locust bean gum of the present invention in a prescribed amount in a formulation according to a known formulation, but other components in the hair cosmetic are particularly limited. Instead, components generally used in hair cosmetics can be blended as optional components. Other components that can be blended are exemplified below.

Examples of the anionic surfactant include alkyl (C 8 -C 24) sulfate and alkyl (C 8 -C 2).
4) ether sulfates, alkyl (8 to 24 carbon atoms) benzenesulfonate, alkane (8 to 24 carbon atoms) sulfonate, alkyl (8 to 24 carbon atoms) phosphate, polyoxyalkylene alkyl (carbon number 8-24) ether phosphate, alkyl (8-24 carbon atoms) sulfosuccinate, polyoxyalkylene alkyl (8-24 carbon atoms)
Ether sulfosuccinate, acyl (C8-C24)
Glutamate, acyl (8-24 carbon atoms) isethionate, acyl (8-24 carbon atoms) amino acid salt, acyl (8-24 carbon atoms) methyltaurine salt, α-sulfo fatty acid ester salt, ether Carboxylates, polyoxyalkylene fatty acids (8 to 24 carbon atoms), ethanolamide sulfate, and long-chain (8 to 24 carbon atoms) carboxylate salts.

Nonionic surfactants include alkanolamides, glycerin fatty acid esters, polyoxyalkylene alkyl ethers, polyoxyalkylene glycols, polyoxyalkylene sorbitan fatty acid esters, sorbitan fatty acid esters, polyoxyalkylene sorbit fatty acid esters, sorbit fatty acid esters, Polyoxyalkylene glycerin fatty acid ester,
Polyoxyalkylene fatty acid ester, polyoxyalkylene alkyl phenyl ether, tetrapolyoxyalkylene ethylenediamine condensate, polyoxyalkylene ether, sucrose fatty acid ester, polyoxyalkylene fatty acid amide, polyoxyalkylene glycol fatty acid ester, polyoxyalkylene castor oil Derivatives, polyoxyalkylene hydrogenated castor oil derivatives, alkyl polyglycosides, and the like.

Examples of the amphoteric surfactant include alkyl (8 to 24 carbon atoms) amidopropyl betaine, alkyl (8 to 24 carbon atoms) carboxy betaine, and alkyl (8 to 24 carbon atoms).
-24) sulfobetaine, alkyl (8-24 carbon atoms)
Hydroxysulfobetaine, alkyl (8 to 2 carbon atoms)
4) aminocarboxylic acid, alkyl (8-24 carbon atoms) imidazolinium betaine, alkyl (8-24 carbon atoms)
Examples thereof include amine oxides, phospholipids, alkyl (C8-24) phosphates containing tertiary nitrogen and quaternary nitrogen, and the like.

Examples of the oil component include olive oil, jojoba oil, liquid paraffin and the like. Examples of the pearling agent include fatty acid ethylene glycol and the like.

Other components include solubilizers (eg, ethanol, ethylene glycol, propylene glycol), humectants (eg, glycerin, sorbitol, maltitol, 1,3-butylene glycol), and viscosity modifiers (eg, methylcellulose, hydroxyethylcellulose). Carboxymethylcellulose), antioxidants, silicones and silicone derivatives, higher alcohols, higher fatty acids, thickeners, sequestering agents (edetate, etc.), pH adjusters, ultraviolet absorbers, bactericides, preservatives, dyes Fragrances and foam enhancers.

In still another embodiment, an organic acid and / or an inorganic acid of the amidoamine compound and a higher fatty acid and / or a higher alcohol can be added.

In still another embodiment, the viscosity can be increased and / or gelled by adding xanthan gum, carrageenan and the like.

[0018]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.

Example 1 95 g of locust bean gum was dispersed in 433 ml of a 70% by volume aqueous solution of isopropanol, and 7.8 g of a 24% by weight aqueous solution of sodium hydroxide was added. Next, an aqueous solution of glycidyltrimethylammonium chloride (hereinafter referred to as GTA) is added so that the active ingredient becomes 35.5 g, and the mixture is heated and reacted at 50 ° C. for 3 hours. After completion of the reaction, 4.9 g of 35% hydrochloric acid (1 mol of sodium hydroxide charged) was diluted with 150 ml of a 70% by volume aqueous solution of isopropanol and used for neutralization. After neutralization at room temperature for 1 hour, methanol 300
The reaction solution was poured into the mixture, and the reaction product was precipitated and filtered. After the obtained precipitate was washed with an aqueous methanol solution, the reaction product was dried under reduced pressure. The nitrogen content of the cation-modified locust bean gum thus obtained was 1.76% by weight. The results are shown in Table 1 (Table 1). Similarly, cation-modified locust bean gums having different nitrogen contents were synthesized by changing the amount of GTA to be added. Table 1 shows the results.
).

Comparative Example 1 A cation-modified locust bean gum having a nitrogen content of 0.11% by weight and 4.20% by weight was synthesized according to the method of Example 1 by changing the amount of GTA to be added. The results are shown in Table 1 (Table 1-).

[0021]

[Table 1]

Example 2 Using the cation-modified locust bean gum obtained in Example 1 and Comparative Example 1, shampoos having the composition shown in (A) of Table 2 were prepared. As a standard product, a shampoo containing no cationic polymer shown in Table 2 (B) was prepared. The performance of the items shown in Tables 6 and 7 was evaluated by ten testers for each adjusted shampoo. Foaming at the time of use, fingering at the time of shampooing, feel of wet hair and feeling of squeak after rinsing, less stickiness after use (dry hair), less stiffness, moist feeling, combing The goodness, gloss and softness were compared with the standard product, and quantified by the methods in Tables 6 and 7, and the integrated value was obtained. The results are shown in Table 3.

From the results in Table 3, it was found that the shampoo performance was improved by the nitrogen content in the cation-modified locust bean gum.

[0024]

[Table 2]

[0025]

[Table 3]

Comparative Example 2 Cation-modified locust bean gum used in the present invention,
In order to compare the effects, a shampoo having the composition shown in (A) of Table 2 was prepared using cation-modified hydroxyethylcellulose having an average ethylene oxide mole number of 1.65 and a nitrogen content of 1.8% by weight. As in Example 2, foaming during use of shampoo, passing of fingers during shampooing, feel of wet hair and feeling of squeak after rinsing, less stickiness after use (dry hair), less stiffness Nas,
The moist feeling, good combability, gloss and softness were compared. The results are shown in Table 4.

From the results in Table 4, the cation-modified locust bean gum of the present invention is more excellent in combability after use (dry hair) than the cation-modified hydroxyethyl cellulose,
It was found to give a smooth feel with less stiffness.

[0028]

[Table 4]

Comparative Example 3 A cation-modified locust bean gum used in the present invention,
In order to compare the effects, cation-modified guar gum (nitrogen content: 1.8% by weight) obtained by cationizing guar gum, which is the same galactomannan polysaccharide as the locust bean gum used in the present invention, is shown in Table 2 (A). A shampoo having the indicated composition was prepared. As in Example 2, foaming during shampooing, finger passing during shampooing, feel of wet hair and squeaky feeling after rinsing, less stickiness after use (dry hair), less stiffness The comparison was made on the smoothness, moist feeling, combability, gloss and softness. The results are shown in Table 5.

From the results shown in Table 5, the present invention in which the composition ratio of mannose and galactose is 4: 1 is obtained from the cationized guar gum in which the composition ratio of mannose and galactose is 2: 1 in the galactomannan polysaccharide. It was found that the cation-modified locust bean gum of (1) gives a creamy foam at the time of shampooing, is excellent in finger passing, has less squeaky feeling after rinsing, and gives a smooth feel.

[0031]

[Table 5]

[0032]

[Table 6]

[0033]

[Table 7]

[0034]

EFFECT OF THE INVENTION The hair cosmetic composition using the cation-modified locust bean gum of the present invention gives a smooth foam feeling when used, gives a smooth and smooth finger passage to the hair during rinsing, and has a Gives a good finish with no rough feeling.

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Claims (4)

[Claims] 1. A galactomannan which is excellent when formulated in a hair cosmetic comprising a cation-modified galactomannan in which a part of the hydroxyl groups contained in the galactomannan is substituted by a quaternary nitrogen-containing group represented by the chemical formula 1. Cationic polymers that provide excellent conditioning properties. Embedded image (Wherein R1, R2 and R3 are each an alkyl group having 1 to 3 carbon atoms, and X- represents a monovalent anion) 2. Galactomannan is a locust bean gum which is a nonionic polysaccharide in which a main chain composed of mannose has a galactose unit as a side chain and a composition ratio of mannose to galactose is 4: 1. The cationic polymer of claim 1. 3. The cationic polymer according to claim 1, wherein the amount of the quaternary nitrogen-containing group substituted with a hydroxyl group in the galactomannan is 0.2 to 3% by weight in terms of the nitrogen content in the cation-modified galactomannan. polymer. 4. A process for reacting a glycidyltrialkylammonium salt or a 3-halogeno-2-hydroxypropyltrialkylammonium salt with galactomannan in replacing a hydroxyl group in galactomannan with a quaternary nitrogen-containing group. 2. The cationic polymer of claim 1 which can be used.