JP2002029963A - Skin-cleansing agent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin-cleansing agent composition which has an excellent cleansing property and excellent safety and gives moist and smooth finishes to skin and hair. SOLUTION: This skin-cleansing agent composition characterized by containing water-insoluble glucomannan; the skin-cleansing agent composition characterized by containing water-insoluble glucomannan, a nonionic surfactant, a carboxyvinyl polymer and/or an alkyl-modified carboxyvinyl polymer, and an alkali agent; the skin-cleansing agent composition characterized by containing water-insoluble glucomannan, a nonionic surfactant, a carboxyvinyl polymer and/or an alkyl-modified carboxyvinyl polymer, an alkali agent, and a polyhydric alcohol.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cleansing composition, and more particularly, to a hair cleansing agent, a facial cleanser, and a body cleansing agent which is excellent in detergency and safety, and gives a moist and smooth finish to skin and hair. A useful skin cleansing composition.

[0002]

2. Description of the Related Art It has been known that a scrub agent is incorporated in a skin cleanser for the purpose of enhancing the physical cleaning effect. Usually, as a scrub agent, polyethylene powder, polystyrene powder, walnut shells, ground products such as apricot and peach seeds, and the like have been often used. However, when polyethylene powder and polystyrene powder are used for the scrubbing agent, they have a drawback that they have a poor image of the human body and the environment because they are synthetic systems. On the other hand, ground products such as walnut shells, apricots and peach seeds are natural products, but are very expensive, and there is a risk of damaging the skin surface due to the structure. Further, in the gel detergent using the scrub agent, the scrub agent in the product is settled or agglomerated, and it becomes difficult to keep the preparation stable. For this reason, the viscosity of the preparation must be increased, resulting in drawbacks such as poor spreading to hair and skin, stringiness, poor dispersibility in water, and the like.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a skin cleansing composition which has an excellent cleansing effect, is safe, has a good feeling in use, and has good stability.

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that by adding a water-insoluble glucomannan, which is a natural product, to a skin cleansing composition, The present inventors have found that the composition is excellent in detergency and safety, and that a predetermined composition can prevent sedimentation of water-insoluble glucomannan over a long period of time, and that a comfortable feeling in use can be obtained. Accordingly, the present invention relates to a skin cleansing composition comprising water-insoluble glucomannan. The present invention further provides a water-insoluble glucomannan, a non-ionic surfactant,
A skin cleansing composition comprising a carboxyvinyl polymer and / or an alkyl-modified carboxyvinyl polymer and an alkali agent. The present invention also provides
The present invention relates to a skin cleansing composition comprising a water-insoluble glucomannan, a nonionic surfactant, a carboxyvinyl polymer and / or an alkyl-modified carboxyvinyl polymer, an alkali agent and a polyhydric alcohol.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The skin cleansing composition referred to in the present specification includes hair cleansing agents such as shampoos and rinses, and body cleansing agents such as facial cleansers, body shampoos, hand soaps, foot soaps, and shaving agents. Cleaning agents and the like. The skin cleansing composition of the present invention can be prepared in either cream or gel form.

Glucomannan is a nonionic natural polymer extracted from the corms and roots of konjac plants, and its main component is a polysaccharide composed mainly of D-mannose and D-glucose. The water-insoluble glucomannan used in the present invention is obtained by using ethanol as an extraction solvent, forming a water-insoluble gel, and then drying the powder. The molecular weight of glucomannan, which is the basis of this product, varies depending on the type of konjac potato used as a raw material, the place of production, and the time of harvest, but is generally in the range of 1,000,000 to 2,000,000. Such glucomannan, including foods and cosmetics, pharmaceuticals, agricultural products, rice cakes, ink industry, plastic industry, etc. are widely and generally used, in the present invention, as "water-insoluble glucomannan" Commercially available products can be used. An example of a commercially available product is "Propol ISLB"
(Made by Shimizu Chemical Co., Ltd.).

[0007] The content of water-insoluble glucomannan in the skin cleansing composition of the present invention is 0.1% based on the whole composition.
5 to 30% by mass is appropriate, and preferably 1 to 10% by mass. If the amount is less than 0.5% by mass, the expected scrubbing effect is not exhibited, while if it exceeds 30% by mass, the effect corresponding to the content cannot be obtained and the feeling in use may be impaired.

In a preferred embodiment of the skin cleansing composition of the present invention, the composition further contains a nonionic surfactant, a carboxyvinyl polymer and / or an alkyl-modified carboxy polymer, and an alkali agent. As the nonionic surfactant used in the skin cleansing composition of the present invention,
Specific examples include polyoxyalkylene addition type, polyoxypropylene / polyoxyethylene addition type, amine oxide type, mono or diethanolamide type, glycerin fatty acid ester, sorbitan fatty acid ester, sucrose fatty acid ester, alkyl glucoside type and the like. . The nonionic surfactant used in the present invention is, of course, not limited to the above specific examples, and in the present invention which can be used alone or in combination of two or more, In particular, an alkyl glucoside-based nonionic surfactant having foaming properties is preferable.

The content of the nonionic surfactant in the skin cleansing composition of the present invention is 1 to 3 with respect to the whole composition.
0% by mass is appropriate, and preferably 3 to 20% by mass. If this amount is less than 1% by mass, the expected detergency will not be exhibited, while if it exceeds 30% by mass, the degreasing power will increase and even the moisturizing components on the skin may be washed away.

As the carboxyvinyl polymer and / or alkyl-modified carboxyvinyl polymer used in the skin cleansing composition of the present invention, those commonly used in the art can be used. Examples of commercially available products include:
Carbopol 940, Carbopol 941, Carbopol 1342, Carbopol Ultrez-10, Pemulen TR
-1, Pemulen TR-2 (all made by Goodrich)
And the like. The carboxyvinyl polymer and / or alkyl-modified carboxyvinyl polymer used in the present invention is not limited to the above specific examples, and may be used alone or in combination of two or more. . In the present invention, Carbopol Ultrez-10 is particularly preferred in that it is easily dispersed in the composition.

[0011] The content of the carboxyvinyl polymer and / or the alkyl-modified carboxyvinyl polymer in the skin cleansing composition of the present invention is 0.05 to 0.05% based on the whole composition.
3% by mass is appropriate, and preferably 0.1 to 2% by mass. If the amount is less than 0.05% by mass, the water-insoluble glucomannan will precipitate, while if it exceeds 3% by mass, the spread to the skin is poor and the feeling of use may be impaired.

The alkaline agent used in the skin cleansing composition of the present invention is used as a neutralizing agent for the carboxyvinyl polymer and / or the alkyl-modified carboxyvinyl polymer. It is not particularly limited as long as it is an agent. Specifically, organic alkaline agents such as monoethanolamine, diethanolamine, triethanolamine, aminomethylpropanol and aminomethylpropanediol, basic amino acids such as L-arginine and L-lysine, sodium hydroxide, potassium hydroxide and the like And the like. Particularly, sodium hydroxide and potassium hydroxide are preferably used. The alkaline agent is not limited to the above specific examples, and may be used alone or in combination of two or more.

The alkaline agent used in the present invention has a pH of 3 to 10 which is usually used in a skin cleansing composition.
Preferably, an amount that can be adjusted to a desired pH between pH 4 and 8 can be appropriately blended. Exceeding this range is not preferred because it may cause irritation to the skin.
The amount of the alkaline agent varies depending on the other components used in the composition, but is generally 0.05% based on the whole composition.
~ 5% by mass. For example, when sodium hydroxide is used, the content is about 0.1 to 0.3% by mass.

In the embodiment of the skin cleansing composition of the present invention, it is preferable that a polyhydric alcohol is further contained in order to favorably maintain the form of water-insoluble glucomannan in the composition. As the polyhydric alcohol used in the present invention, specifically, glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, hexylene glycol, polyethylene glycol,
Xylitol, sorbitol and the like. The polyhydric alcohol used in the present invention is not limited to the above specific examples, and may be used alone or in combination of two or more. In the present invention, glycerin and 1,3-butylene glycol are particularly preferably used.

[0015] The content of polyhydric alcohol in the skin cleansing composition of the present invention is suitably from 5 to 70% by mass, and preferably from 10 to 40% by mass, based on the whole composition.
If this amount is less than 5% by mass, a smooth gel cannot be obtained, and glucomannan easily swells, so that an expected scrub feeling cannot be obtained. On the other hand, if it exceeds 70% by mass, the sticky feeling is increased and the feeling of use may be impaired.

[0016] In addition to the above components, other components can be appropriately added to the skin cleansing composition of the present invention according to the type of the composition and the purpose of use. In particular, various water-soluble polymer compounds other than the carboxyvinyl polymer and / or the alkyl-modified carboxyvinyl polymer can be used in combination for the purpose of improving the usability. Examples of the water-soluble polymer compound include guar gum, xanthan gum, carrageenan, agar, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, cationized cellulose, cationized guar gum, and water-soluble glucomannan.

The skin cleansing composition of the present invention may further contain, as other optional components, cleansing components commonly used in skin cleansing compositions. For example, one or two of moisturizing agents, anti-inflammatory agents, bactericides, preservatives, ultraviolet absorbers, antioxidants, chelating agents, thickeners, pigments, fragrances, and the like.
More than one species can be selected and used.

The skin cleansing composition of the present invention can be prepared in the form of a cream, a gel or the like, and can be produced by mixing the above-mentioned components by a conventional method. The thus obtained skin cleansing composition of the present invention is used by rinsing with water or hot water after performing massage.

[0019]

The present invention will be further described with reference to the following examples. These do not limit the present invention at all. Table 1 and Table 2 below (Examples 1 to 8 and Comparative Examples 1 to
The composition shown in 8) (unit: mass%, 100 parts in total with purified water) and each skin cleansing composition (gel body shampoo) were prepared by the following method, and the following tests were performed. The test procedure and evaluation method are as follows. The results are also shown in Tables 1 and 2.

(Production method) A. Components (1) to (3) and (9) are uniformly dissolved. B. Components (4) to (7) are uniformly dissolved. C. Add A to B with stirring and solubilize. D. Add (8) to C and stir and mix uniformly to obtain a detergent composition.

[Skin Irritation Measuring Method and Evaluation Criteria] The above-mentioned skin cleansing composition was adjusted to 1% and heated to 40 ° C. using an aqueous solution for 5 men and women. The part was left for 5 minutes with the part completely immersed, and then rinsed with lukewarm water and lightly removed with a towel or the like. This operation was repeated five times (once every 30 minutes). 3 points when there is no change in the skin, 2 points when the skin is slightly rough,
The case where the skin was considerably rough was defined as one point, and the average value of 10 persons was determined and judged in the following three stages. ：: Weak skin irritation (average: 2.5 or more) ○: Moderate skin irritation (average: 1.5 or more 2.5)
×): Strong skin irritation (average value: less than 1.5)

[Evaluation Method and Evaluation Criteria for Feeling of Use] For each of the detergent compositions, five men and women were subjected to body washing, and a sensory evaluation was performed. The evaluation items and evaluations were as follows, and the average value of each of the ten persons was determined and judged in four steps. (1) Detergency 5 points: Drops very well 4 points: Drops well 3 points: Drops 2 points: Difficult to drop 1 point: Same as water washing (2) Smoothness after rinsing 5 points: Low slickness
4 points: Slightly less slick 3 points: Normal 2 points: Slightly slick 1 point: More slick (3) Moist feeling after drying 5 points: Moist 4
Points: slightly moist 3 points: normal 2 points: slightly moist 1 point: not moist ◎: very good (average value: 4.5 or more) ○: good (average value: 3.5 or more and less than 4.5) △: Normal (Average value: 2.5 or more and less than 3.5) ×: Poor (Average value: Less than 2.5)

[Dispersion stability] A 45 ml sample was placed in a 50 ml transparent glass container and sealed, and immediately thereafter and at 50 ° C and 5 ° C.
, And the dispersion state after one month was visually determined as an index of stability. The criteria are as follows. ：: Neither precipitation nor aggregation of glucomannan was observed at all. Δ: Slight precipitation and aggregation of glucomannan were observed. ×: Precipitation and aggregation of glucomannan are clearly observed.

[0024]

[Table 1] ^{* 1} NIKKOL Carbopol Ultrez-10 (Nikko Chemicals Co., Ltd.) ^{* 2} My Doll 12 (Kao Corp.) ^{* 3} Propol ISLB (Shimizu Chemical Co., Ltd.)

[0025]

[Table 2] ^{* 1} NIKKOL Carbopol Ultrez-10 (Nikko Chemicals Co., Ltd.) ^{* 2} My Doll 12 (Kao Corp.) ^{* 3} Propol ISLB (Shimizu Chemical Co., Ltd.)

As is clear from the results of Tables 1 and 2,
The skin cleansing composition of the present invention was hypoallergenic and excellent in feeling during use.

[0027]

Example 9 A body shower gel was prepared according to the following formulation according to a conventional method. <Composition> (% by mass) Carboxyvinyl polymer 1 Sodium hydroxide 0.2 Alkyl glucoside 12 Glycerin fatty acid ester 0.5 Glycerin 25 1,3-butylene glycol 10 Phenoxyethanol 0.5 Fragrance 0.2 Water-insoluble glucomannan 3 Remaining purified water (total amount 100) This body shower gel has a moderate scrub feeling,
Foaming, foam removal is good, washing is refreshing,
It was moist.

[0028]

Example 10 A face wash was prepared according to the following formulation according to a conventional method. <Composition> (% by weight) Carboxyvinyl polymer 0.5 Sodium hydroxide 0.1 Xanthan gum 0.2 Sucrose fatty acid ester 10 POE (9) Lauryl ether 5 Propylene glycol 5 Glycerin 10 Disodium edetate 0.1 Paraben 0 0.3 Fragrance 0.2 Water-insoluble glucomannan 2 Purified water Remaining amount (total 100) This face wash has a moderate scrubbing feeling, no squeaky feeling when rinsing, and a moist, non-greasy finish. Met.

[0029]

The skin cleansing composition of the present invention is excellent in detergency and safety, and has an effect of moist and smooth finishing on skin and hair. In addition, the skin cleansing composition of the present invention has good stability and insoluble glucomannan is well dispersed.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) C11D 3/382 C11D 3/382 7/44 7/44 F term (reference) 4C083 AB031 AB032 AC111 AC122 AC172 AC182 AC422 AC482 AC532 AD091 AD092 AD202 AD211 AD212 AD222 AD352 BB04 CC23 DD27 DD41 EE06 EE07 4H003 AC05 BA15 DA02 EA21 EB05 EB30 EB42 EB46 ED02 FA02 FA16 FA21

Claims (3)

[Claims] 1. A skin cleansing composition comprising water-insoluble glucomannan. 2. A skin cleansing composition comprising a water-insoluble glucomannan, a nonionic surfactant, a carboxyvinyl polymer and / or an alkyl-modified carboxyvinyl polymer, and an alkaline agent. 3. A skin cleansing composition comprising a water-insoluble glucomannan, a nonionic surfactant, a carboxyvinyl polymer and / or an alkyl-modified carboxyvinyl polymer, an alkali agent and a polyhydric alcohol.