JP2010006726A - Skin cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin cosmetic having less stickiness directly after its application and lasting a humectant effect. <P>SOLUTION: This skin cosmetic contains the following components (A) to (F): (A) 1 to 25 mass% of a polyol, (B) 0.5 to 15 mass% of an oily component, (C) a 0.1 to 3 mass% hydrogenated polyisobutene having 1,000 to 3,000 molecular weight, (D) 1 to 10 mass% of a higher alcohol, (E) 0.3 to 10 mass% of a surfactant and (F) water. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a skin cosmetic.

  Skin cosmetics such as body lotions are mainly used for the purpose of moisturizing, and glycerin, petrolatum, vitamins and the like are blended as moisturizing agents. However, if a large amount of such a moisturizing agent is blended in order to obtain a sufficient moisturizing effect, problems such as stickiness immediately after application occur. Moreover, even if a moisturizing effect was obtained by using these moisturizing agents, the effect was not sufficiently sustained.

As cosmetics having an excellent moisturizing effect, Patent Document 1 discloses (1) C14 to C22 fatty acids, (2) fatty acid mono- or diglyceryl esters, (3) EO fatty acid esters, (4) nonpolar oils, (5) O / W emulsified cosmetics containing an aliphatic alcohol, (6) a lipophilic thickener having a melting point of 30 ° C. or higher, (7) a hydrogenated polyisobutene having a molecular weight of 100 to 4000, and (8) a polar lipid are described. However, this cosmetic is not sufficiently satisfactory in terms of the sustainability of the moisturizing effect.
US Pat. No. 6,551,601

  An object of the present invention is to provide a skin cosmetic that has little stickiness immediately after application and maintains a moisturizing effect.

  The present inventor uses a combination of a polyol, an oily component, a specific hydrogenated polyisobutene, a higher alcohol, and a surfactant in a specific ratio to provide a skin cosmetic that has less stickiness immediately after application and maintains a moisturizing effect. It was found that it can be obtained.

The present invention includes the following components (A) to (F):
(A) Polyol 1-25% by mass,
(B) Oil component 0.5-15 mass%,
(C) 0.1 to 3% by mass of hydrogenated polyisobutene having a molecular weight of 1000 to 3000,
(D) 1-10% by mass of higher alcohol,
(E) Surfactant 0.3 to 10% by mass,
(F) To provide a skin cosmetic containing water.

  The skin cosmetic of the present invention has little stickiness immediately after application, and also maintains an excellent moisturizing effect.

  The component (A) polyol used in the present invention is not particularly limited as long as it is used in normal cosmetics. For example, glycerin, ethylene glycol, propylene glycol, 1,3-butylene glycol, having a molecular weight of 200 to 1,000. Examples include polyethylene glycol, polypropylene glycol having a molecular weight of 200 to 3000, and sorbitol.

  As the component (A), one or more kinds can be used, and the total composition contains 1 to 25% by mass, preferably 3 to 22% by mass. Within this range, a high moisturizing feeling can be given to the skin, which is preferable.

  The oil component of the component (B) used in the present invention is not particularly limited as long as it is a component other than the component (D) and can be used in ordinary cosmetics. For example, palm oil, palm kernel oil, camellia oil , Evening primrose oil, macadamia nut oil, olive oil, rapeseed oil, corn oil, sesame oil, jojoba oil, rice germ oil, wheat germ oil, liquid oil such as glyceryl trioctanoate; solids such as cocoa butter, palm oil, molasses, hardened castor oil Fats and oils; waxes such as beeswax, candelilla wax, cotton wax, nuta wax, lanolin, lanolin acetate, liquid lanolin, sugarcane wax; hydrocarbons such as liquid paraffin, liquid isoparaffin, petrolatum, squalene, squalane, microcrystalline wax; Examples include ester oils such as isopropyl palmitate and isopropyl myristate.

  One or more types of component (B) can be used, and the total composition contains 0.5 to 15% by mass, preferably 1 to 10% by mass. Within this range, a stable cosmetic with good usability can be obtained.

  The hydrogenated polyisobutene of component (C) has a molecular weight of 1000 to 3000, preferably 1400 to 3000. By using such hydrogenated polyisobutene, it is possible to suppress stickiness immediately after coating and to maintain the moisturizing effect.

  As the component (C), one or more kinds can be used, and the total composition contains 0.1 to 3% by mass, preferably 1 to 2% by mass. Within this range, a stable cosmetic with good usability can be obtained.

  The higher alcohol of component (D) is not particularly limited as long as it is used in ordinary cosmetics, and those having 12 to 22 carbon atoms are preferable. For example, lauryl alcohol, stearyl alcohol, cetyl alcohol, cetostearyl alcohol Etc.

  As the component (D), one or more kinds can be used, and the total composition contains 1 to 10% by mass, preferably 2 to 8% by mass. Within this range, a stable cosmetic with good usability can be obtained.

The surfactant of component (E) is not particularly limited as long as it is used in ordinary cosmetics, and any of anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, etc. But it can also be used.
Examples of the anionic surfactant include fatty acid salts, alkyl sulfates, alkyl ether sulfates, polyoxyalkylene alkyl ether sulfates, alkyl sulfonates, alkyl amide sulfonates, alkyl aryl sulfonates, and alkyl benzene sulfonates. , Olefin sulfonate, paraffin sulfonate, alkyl sulfosuccinate, alkyl ether sulfosuccinate, polyoxyalkylene alkyl ether carboxylate, alkylamide sulfosuccinate, alkyl succinamide salt, alkyl sulfoacetate, acyl sarcosine salt , Acyl isethionate, alkenyl succinate, alkyl ether acetate, polyoxyalkylene alkyl ether acetate; alkyl phosphate, alkyl ether phosphate, polyoxya Phosphates such as xylene alkyl ether phosphates; acylated amino acid salts such as N-acyl taurine salts, N-acyl glycine salts, N-acyl alanine salts, N-acyl glutamates, N-acyl aspartates, etc. Can be mentioned.

  Examples of cationic surfactants include alkyltrimethylammonium salts such as stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, and behenyltrimethylammonium chloride; dialkyldimethylammonium salts such as dioctadecyldimethylammonium chloride and distearyldimethylammonium chloride; trialkylmethyl Examples thereof include ammonium salts and alkylamine salts.

  Examples of amphoteric surfactants include 2-undecyl-N, N- (hydroxyethylcarboxylmethyl) -2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, and the like. Imidazoline-based amphoteric surfactants; 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkylbetaines, amide betaines, sulfobetaine and other betaine-based amphoteric surfactants; N- Amino acid type amphoteric surfactants such as lauryl glycine and N-lauryl β-alanine can be mentioned.

  Nonionic surfactants include, for example, polyoxyethylene hydrogenated castor oil and derivatives thereof; polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monostearate and polyoxyethylene sorbitan tetraoleate; polyoxyethylene glyceryl monoiso Polyoxyethylene glycol fatty acid esters such as stearate and polyoxyethylene glyceryl triisostearate; polyoxyethylene hexyl decyl ether, polyoxyethylene octyldodecyl ether, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl With polyoxyethylene such as ether, polyoxyethylene nonylphenyl ether and other polyoxyethylene alkyl ether Other types surfactants, polyglycerol alkyl ethers, polyglycerol fatty acid esters, sucrose fatty acid esters.

  As the component (E), fatty acid salts, polyoxyethylene addition type surfactants such as polyoxyethylene alkyl ether, behenyltrimethylammonium chloride, distearyldimethylammonium chloride and the like are particularly preferable.

  One or more types of component (E) can be used, and 0.3 to 10% by mass, preferably 1 to 5% by mass is contained in the total composition. Within this range, a stable cosmetic with good usability can be obtained.

  Component (F) water is preferably contained in the total composition in an amount of 37 to 97.1% by mass, particularly 60 to 85% by mass, since the feeling of use is good and a stable cosmetic is obtained.

The skin cosmetic of the present invention is preferable because it can further contain (G) volatile silicone and can further prevent stickiness immediately after application.
Examples of the volatile silicone include 1 to 2 cs dimethylpolysiloxane, 4 to 6-membered cyclic silicone, and the like.

  As the component (G), one or more kinds can be used, and the total composition is 0.1 to 3% by mass, preferably 1 to 2% by mass. Within this range, stickiness immediately after application can be suppressed.

  In addition to the above components, the skin cosmetic of the present invention is a component used in ordinary cosmetics, such as preservatives, sequestering agents, thickeners, powders, UV absorbers, UV blockers, A humectant, a fragrance | flavor, a pH adjuster, a high molecular compound, etc. can be contained. It can also contain medicinal components such as vitamins, skin activators, blood circulation promoters, resident bacteria control agents, active oxygen scavengers, anti-inflammatory agents, whitening agents, bactericides, and physiologically active components.

  The skin cosmetic of the present invention can be produced by mixing the above components and according to a usual method. In particular, an oil-in-water emulsion composition is preferable.

  The skin cosmetic of the present invention is suitable as a body lotion.

Examples 1-2 and Comparative Example 1
Skin cosmetics (body lotions) having the compositions shown in Table 1 were produced and evaluated for dynamic friction. The results are also shown in Table 1.

(Production method)
(B) Oil component, (C) Hydrogenated polyisobutene, (D) Higher alcohol, (E) Surfactant heated and mixed at 75 ° C., and (A) polyol and (F) water mixed with water It was added to the phase (heated to 75 ° C.), mixed with stirring, and then cooled to obtain the intended skin cosmetic.

(Evaluation methods)
It was found that there is a correlation that the higher the dynamic friction force, the higher the moisturizing feeling. Therefore, the dynamic friction force was evaluated by the following method.
(1) 0.12 g each of skin cosmetics was applied to 5 × 12 cm artificial leather (manufactured by Daido Leather Co., Ltd., GT-202, material is urethane). The artificial leather 24 hours after application (left at 21 ° C. and 46% RH) was fixed to a surface property measuring machine (Type: 14DR) manufactured by Shinto Kagaku with double-sided tape.
(2) 3 × 5 cm of artificial leather made of the same material as above was fixed to the sensor part of the surface property measuring machine with double-sided tape. By rubbing artificial leather together as a model system, the feel when rubbing the skin with a hand can be evaluated.
(3) The dynamic friction force of the artificial leather 24 hours after application was measured with a surface property measuring machine under the following conditions.
Measurement conditions of surface property measuring machine:
Vertical load 70g, Sampling time 50ms, Number of sampling points 150,
Movement speed 1200mm / min, movement distance 70.0mm

  From the results shown in Table 1, the skin cosmetics of Examples 1 and 2 containing hydrogenated polyisobutene have a higher dynamic friction force after 24 hours than Comparative Example 1 containing no hydrogenated polyisobutene. It can be seen that the sustainability of is improved.

Examples 3 to 4 and Comparative Example 2
A skin cosmetic (body lotion) having the composition shown in Table 2 was produced, and the dynamic friction force was evaluated in the same manner as in Examples 1 and 2. The results are also shown in Table 2.

(Production method)
(B) Oily component, (C) Hydrogenated polyisobutene (D) Higher alcohol is heated and mixed at 80 ° C., and the oil phase is mixed with a small amount of water, (A) polyol, and (E) surfactant mixed with water phase ( To 80 ° C.). The heating was stopped and the mixture was stirred and mixed while gradually adding water to obtain the desired skin cosmetic.

  From the results shown in Table 2, the skin cosmetics of Examples 3 to 4 containing hydrogenated polyisobutene have a higher dynamic friction force after 24 hours than Comparative Example 2 not containing this, and thus moisturizing feeling. It can be seen that the sustainability of is improved.

Example 5 and Comparative Examples 3-4
Skin cosmetics (body lotions) having the compositions shown in Table 3 were produced in the same manner as in Examples 1 to 2, and evaluated for their low stickiness immediately after application and moisturizing feeling (immediately after application, 7 hours after application). The results are also shown in Table 3.

(Evaluation methods)
Each skin cosmetic was applied to the lower thigh by 10 professional panelists, and sensory evaluation was performed for the low stickiness immediately after application and the moisturizing feeling immediately after application and 7 hours after application. The score was calculated | required on the following references | standards and it determined by the average score.

(1) Less stickiness immediately after application:
When each skin cosmetic was applied, the stickiness immediately after the application of the lower leg was subjected to sensory evaluation based on the following criteria.
Not sticky ... Score 4.
Not very sticky ... Score 3.
Slightly sticky ... Score 2.
Sticky ... Score 1.

(2) Moisturizing feeling (immediately after 7 hours);
When each skin cosmetic was applied, the moisturizing feeling immediately after application of the lower leg and after 7 hours was subjected to sensory evaluation based on the following criteria.
High moisturizing feeling (moist feeling) ... Score 4.
Slightly moisturizing feeling (moist feeling) ... Score 3.
Moisturizing feeling (moisturation) is not so high ... Score 2.
Low moisturizing feeling (moist feeling) ... Score 1.

Judgment criteria;
A: Average score of 3.5 to 4.0.
B: Average score of 2.5 to 3.4.
C: Average score of 1.5 to 2.4.
D: Average score of 1.0 to 1.4.

Example 6 and Comparative Examples 5-6
A skin cosmetic (body lotion) having the composition shown in Table 4 was produced in the same manner as in Examples 3 to 4, and in the same manner as in Example 5, the lack of stickiness immediately after application and the moisturizing feeling (immediately after application 7). After). The results are also shown in Table 4.

Example 7
Skin cosmetics having the compositions shown in Table 5 are produced in the same manner as in Examples 1-2.
The obtained skin cosmetic has little stickiness immediately after application and maintains the moisturizing effect.

Example 8
Skin cosmetics having the compositions shown in Table 6 are produced in the same manner as in Examples 3-4.
The obtained skin cosmetic has little stickiness immediately after application and maintains the moisturizing effect.

Claims (3)

The following components (A) to (F):
(A) Polyol 1-25% by mass,
(B) Oil component 0.5-15 mass%,
(C) 0.1 to 3% by mass of hydrogenated polyisobutene having a molecular weight of 1000 to 3000,
(D) 1-10% by mass of higher alcohol,
(E) Surfactant 0.3 to 10% by mass,
(F) Skin cosmetics containing water.   The skin cosmetic according to claim 1, further comprising (G) 0.1 to 3% by mass of volatile silicone.   The skin cosmetic according to claim 1 or 2, which is a body lotion.