JP2000212599A - Stabilized composition of detergent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stabilized composition of detergent safe to the human body and not accumulating in the environments. SOLUTION: This composition comprises ascorbic acid, erysorbic acid or their alkali salt, gluconic acid, 4-O-galactopyranosylgluconic acid or their alkali metal salt and 1-hydroxyethylidene-1, 1-diphosphonic acid or its alkali metal salt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a stabilizing composition for preventing deterioration of color and odor due to aging and thermal deterioration of a detergent.

[0002]

2. Description of the Related Art Factors inhibiting the chronological and thermal stability of detergents include oxidation of surfactants such as fatty acid salts, which are bases of detergents, and fragrances. Therefore, various attempts have been made in the past to prevent the oxidation of detergents, and many attempts have been made with respect to soaps based on fatty acid salts. When fatty acid salts are stored or stored for a long period of time, they deteriorate and change in quality due to oxidation, discoloration and foul odor, so that the quality as a detergent cannot be ensured. Many studies have been made on the deterioration and deterioration caused by the oxidation of fatty acid salts, and the mechanism is as follows. First, peroxides of fatty acids, which are primary oxides, are generated by the autoxidation of fatty acid salts, and free radicals are generated from the peroxides, which in turn cause reactions one after another, resulting in secondary oxides such as polymers and aldehydes. This produces a source of coloring and offensive odor. When fatty acid salts are oxidized, heavy metal ions such as iron and copper act as catalysts to accelerate the oxidation of the fatty acid salts, thereby accelerating the oxidative degradation of the fatty acid salts.

[0003] In view of the above, not only a human body detergent using a fatty acid salt as a base material, but also 3,5-di-dichlorobenzene for the purpose of preventing deterioration of color and odor due to daily and thermal deterioration of the detergent.
tert-butyl-4-hydroxytoluene (hereinafter referred to as BH
T) and ethylenediaminetetraacetate (hereinafter referred to as E) to sequester metal ions.
Chelating agent such as DTA). These antioxidants or chelating agents are generally used in combination of two or more, because when used alone, the effect of preventing deterioration of the color and odor due to aging and thermal deterioration of the detergent is insufficient. Often. Examples of the combination include EDTA or an alkali metal salt thereof and 1-hydroxyethylidene-1,1-diphosphonic acid (hereinafter referred to as HE).
DP) or a combination thereof with an alkali metal salt thereof (JP-B-57-43598), HEDP or an alkali metal salt thereof, EDTA or an alkali metal salt thereof,
Combination of three components with an organic polybasic acid such as citric acid or malic acid or a salt thereof (JP-A-58-11729)
7), EDTA or an alkali metal salt thereof, and HEDP
Or a combination consisting of three components of an alkali metal salt thereof and BHT (Japanese Patent Publication No. 2541265), diethylenetriaminepentaacetic acid (hereinafter abbreviated as DTPA) or an alkali salt thereof, HEDP or an alkali metal salt thereof, gluconic acid or Combination of the alkali metal salt and BHT (JP-A-8-109123 and JP-A-9-109123)
11297) has been proposed.

[0004] When stabilizing a detergent using a plurality of antioxidants and chelating agents as described above, it is necessary to use two or more stabilizers having different action mechanisms in combination to increase the stabilizing effect. desirable. However, even when two or more types of stabilizers having different action mechanisms are combined and combined, a synergistic effect is not always obtained by the combination. Because the effect often does not differ much from the case of the combination,
Developing an optimal stabilizer is not easy. In addition, ascorbic acid and erythorbic acid or their alkali metal salts have been used for antioxidant applications of foods for a long time,
Few examples have been used for detergents, and N-acylglycine salt-based detergents have
Example in which a chelating agent selected from the group consisting of DTA, ascorbic acid, kephalin, gluconic acid, saccharic acid, hexametaphosphoric acid, HEDP, dihydroxyethylglycine and salts thereof is added to improve foaming and foaming during washing However, ascorbic acid, erythorbic acid, or their alkali metal salts are not used in detergents because they have a weak antioxidant effect.

[0005]

As described above, for stabilizing the color and odor of a detergent, BHT has been conventionally used as an antioxidant and EDTA as a chelating agent. Came. However, in recent years, not only the stabilization of the color and odor of the detergent, but also the effect of the stabilizer on the human body, the effect on the natural environment after being discharged into the environment after being contained in wastewater after use, etc. Has been attracting attention, and urgent action is required. BHT and EDTA pose a risk of causing skin disorders such as allergies to the human body, and BHT has yet to be wiped out of its carcinogenic potential. Further, regarding EDTA, accumulation in a natural environment is a problem due to poor biodegradability. That is, a stabilizer which is safe for a human body and does not accumulate in a natural environment is required. However, finding a new stabilizer that is safe for the human body and does not deposit in the natural environment takes a long time and is very difficult. Moreover, even if the existing stabilizing agent does not accumulate on the human body safely and in the natural environment, the effect of stabilizing the cleaning agent is not sufficient as compared with the conventional one. This is the actual situation. The present invention is intended to solve the above-mentioned problems of the prior art, and stabilizes the color and odor of a detergent using a stabilizer that is safe for the human body and does not accumulate in the natural environment. The purpose is to obtain a chemical method.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have studied various combinations of antioxidants and chelating agents, and as a result, as a result, ascorbic acid, erythorbic acid or their alkali metal A salt, gluconic acid, 4-O-galactopyranosylgluconic acid or an alkali metal salt thereof, and HEDP as a third component.
Or by using in combination with an alkali metal salt thereof, all or most of the stabilizers used for stabilizing the color and odor of the cleaning agent can be stabilized safely without being deposited on the human body and in the natural environment. The present invention was completed by finding a stabilizing effect equivalent to or higher than that of the above-described conventional technique.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The detergent to which the stabilized composition of the present invention is applied is not particularly limited, and can be used for bar soap, body shampoo, hair shampoo, facial cleanser, shaving cream and the like. In addition, cosmetics such as hair rinse, cleansing cream, burnishing cream, emollient cream, etc., for the human body,
It can be widely used for industrial cleaning agents and the like. Surfactant as a base used in the detergent is not particularly limited, fatty acid salts including fatty acid soap, alkyl sulfate,
Surfactants such as polyoxyethylene alkyl sulfate, alkanoyl diethanolamide, alkanoyl glutamate can be used. Of these, fatty acid soaps are particularly preferred.

[0008] In addition, components commonly used in detergents can be added to a detergent for human body to which the stabilizer of the present invention is to be added, as long as the effects of the present invention are not impaired. Components commonly used in detergents include fragrances, glycerin fatty acid esters such as glycerin monostearate and glycerin monooleate, sucrose fatty acid esters, sorbitan fatty acid esters, propylene glycol fatty acid esters, and polyoxyethylene fatty acid. Emulsifiers such as esters, guar gum, xanthan gum, methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose, viscosity modifiers such as carboxyvinyl polymer, cationized cellulose, polyvinyl alcohol, film-forming agents such as polyvinylpyrrolidone polymers, oils and fats, waxes, Liquid paraffin, solid paraffin, petrolatum, squalane, silicone polymer, higher fatty acid, higher alcohol, stearyl steer Oil, butyl stearate, isopropyl myristate, etc., preservatives and fungicides such as benzoate and parahydroxybenzoate, glycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, sorbitol, pyrrolidone carboxylic acid Humectants such as acid, lactate, urea,
PH adjusters such as citric acid, sodium hydroxide, potassium hydroxide, and triethanolamine; pearlizing agents such as ethylene glycol monostearate and ethylene glycol distearate; dyes and pigments; and ultraviolet absorbers. it can.

The mixing ratio of the stabilizer of the detergent of the present invention is as follows:
An alkali metal salt such as ascorbic acid, erythorbic acid or a sodium salt or a potassium salt thereof, and an alkali metal salt such as gluconic acid, 4-O-galactopyranosylgluconic acid or a sodium or potassium salt thereof, HEDP or The three components with an alkali metal salt such as a sodium salt or a potassium salt are added to gluconic acid, 4-O-galactopyranosyl gluconic acid or a salt thereof with respect to 1 to 20 ascorbic acid, erythorbic acid or an alkali metal salt thereof. Alkali metal salt 0.5-25, HE
It is preferable to mix DP or an alkali metal salt thereof in a ratio of 0.5 to 25, more preferably ascorbic acid, erythorbic acid or an alkali metal salt thereof.
10, gluconic acid, 4-O-galactopyranosylgluconic acid or an alkali metal salt thereof is 1 to 20,
HEDP or an alkali metal salt thereof is blended at a ratio of 1 to 20.

The amount of the stabilized composition of the present invention added to the detergent can vary depending on the type and use of the detergent, but is generally in the range of 0.05 to 1.5% by weight. Thus, i.e. 0.02 to 0.4% by weight, preferably 0.04 to 0.2% by weight of ascorbic acid, erythorbic acid or alkali metal salt, gluconic acid, 4-O-galactopyranosylgluconic acid or 0.01 to 0.5% by weight of those alkali metal salts, preferably 0.02 to
The content of HEDP or an alkali metal salt thereof as a chelating agent may be 0.01 to 0.5% by weight, preferably 0.02 to 0.4% by weight.

[0011]

EXAMPLES In order to evaluate a method of stabilizing a detergent against aging and thermal deterioration, it is important to examine the degree of coloring of the detergent and the degree of oxidation of a surfactant as a base. . Therefore, the present inventors prepared an aqueous solution of potassium oleate, a surfactant susceptible to oxidation, in a dark place at 50 ° C.
After storing for 20 days at room temperature, the coloring of the whole solution and the oxidation of potassium oleate were examined.

[Examples 1 to 5]

[Comparative Examples 1 to 9] [Test operation] 0% containing 25% (v / v) of ethanol and 1 ppm of Fe ³⁺ was added according to the mixing ratio of the antioxidant and the chelating agent shown in Tables 1 and 2. A .176 mol / L potassium oleate aqueous solution (5% (w / v) as oleic acid) was prepared and used as a test solution. 2 ml of each test solution was placed in a 50 ml polypropylene centrifuge tube, sealed, and stored in a constant temperature incubator at 50 ° C. for 20 days. [Evaluation of Degree of Coloring] The absorbance of the test solution at 420 nm was measured with a spectrophotometer. The degree of coloring of each test solution was expressed as a percentage of the absorbance of each test solution with respect to the absorbance of the blank, and this was defined as the degree of coloring. [Evaluation of Oxidation Degree] 30% (w /
w) 10 ml of aqueous trichloroacetic acid solution and 0.67% (w /
v) After adding 10 ml of an aqueous solution of 2-thiobarbituric acid, the mixture was heated for 10 minutes in boiling water, cooled on ice, and then centrifuged at 3000 rpm for 10 minutes. The absorbance of the supernatant at 532 nm was measured with a spectrophotometer. As the degree of oxidation of each test solution, the ratio of the absorbance of each test solution to the absorbance of Comparative Example 9 (blank) was expressed as a percentage, and this was defined as the degree of oxidation.

[0012]

[Table 1]

[0013]

[Table 2]

[0014]

Embodiment 6

Comparative Examples 10 to 16 A mixture of fatty acid sodium (sodium laurate, sodium palmitate, sodium stearate, sodium oleate), glycerin,
An antioxidant, a chelating agent, and a pigment were added to each 100 parts by weight of a water-based soap base in accordance with the addition ratios shown in Table 3, followed by kneading, followed by shaping and drying to obtain a solid soap. This was stored in a constant temperature incubator at 50 ° C. for 20 days, and the following evaluation was performed. [Evaluation of Color] Using 11 panelists, the color of the bar was evaluated by a sensory test. The sensory test was performed in Comparative Example 16
The whiteness of each soap was evaluated according to the following three grades as compared with the (standard) soap. ○ (whiter than Comparative Example 16), Δ (whiteness is equal to Comparative Example 16), ×
(Inferior whiteness compared to Comparative Example 16)

[0015]

[Table 3]

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) C11D 9/26 C11D 9/26 9/34 9/34

Claims (2)

[Claims] 1. Ascorbic acid, erythorbic acid or an alkali metal salt thereof, gluconic acid, 4-O-galactopyranosylgluconic acid or an alkali metal salt thereof, and 1-hydroxyethylidene-1,1-diphosphonic acid Or a detergent-stabilizing composition containing an alkali metal salt thereof. 2. A detergent comprising a fatty acid soap and the stabilized composition of claim 1.