JPH0491018A - Skin cleaner - Google Patents

Abstract

PURPOSE:To provide a skin cleaner having good infiltration into periphery of skin, good touch, excellent cleansing effect and semi-transparent or transparent appearance by compounding an one phase type composition, comprising a hydrophilic nonionic surfactant, a specific water-soluble compound, etc., and a specified powdery material. CONSTITUTION:The skin cleaner contains an one phase type composition, comprising a hydrophilic surfactant (e.g. polyoxyethylene alkyl ether), a hydroxyl group-containing water-soluble compound [e.g. propylene glycol or isoprene glycol (produced by Kurare Co.)], a liquid oil (e.g. liquid paraffin, squalane, polyisobutene) and water and a powdery material (e.g. silicic acid, calcium silicate) having a difference of 0.1, preferably 1.35-1.63, between the refractive indices of the powdery material and the liquid oil.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a skin cleansing agent, and more specifically, it has good permeability into the skin details and excellent feeling of use, and also has physical properties due to the particles it contains. (Mechanical) Relating to a skin cleanser with excellent cleaning effects and a translucent or transparent appearance.

[Conventional technology]

There are cleansing cosmetics, pine surge cosmetics, etc. as cosmetics that apply oil components to the skin for the purpose of removing skin dirt and makeup cosmetics, or for the purpose of pine surges the skin, and these are applied to the skin and spread. , which is removed from the skin after its intended use has been fulfilled. These cosmetics are commercially available in the form of oils, creams of oil-in-water or water-in-oil emulsions, or gels of oil-in-surfactant emulsions.

However, these conventional cleansing cosmetics and pine surge cosmetics containing oil components have drawbacks such as being sticky when used and having poor storage stability.

Recently, as a technique to solve these drawbacks, cleansing cosmetics, pine surge cosmetics, etc. that utilize liquid crystal structures made of wood-philic nonionic surfactants have been reported (Japanese Patent Laid-Open No. 62-53910). , JP-A-62-96
Publication No. 585). Skin cleansers containing such hydrophilic nonionic surfactants are of a uniform one-phase type, have a good semi-transparent to transparent appearance, and have a good feeling of use such as a light feeling after washing off, and a good cleansing sensation. Performance is also good. .

[Problem to be solved by the invention]

However, skin cleansers containing these wood-loving nonionic surfactants are used when there is an extremely large amount of makeup stains, when removing unnecessary aged stratum corneum from the skin, and due to the diversification of makeup that has been seen in recent years. Depending on the type, the cleansing performance may not be sufficient.

On the other hand, when it comes to physical cleaning using particles contained in commercially available scrubs, water-based types do not remove dirt completely if there is a lot of makeup stains, while oil-based types are sticky and do not feel refreshing, resulting in poor feel after washing. I didn't like it. Further, when such ordinary powder is blended, there is a problem that transparency is impaired.

[Means to solve the problem]

Under these circumstances, the present inventors conducted intensive research to solve the above problems, and found that by incorporating powder with a refractive index close to that of liquid oil into the above cosmetics, the physical (mechanical) cleaning effect can be improved. The present invention was completed based on the discovery that it is possible to obtain a skin cleansing agent with excellent translucent to transparent appearance.

That is, the present invention provides a one-phase composition containing a hydrophilic nonionic surfactant, a water-soluble compound having a hydroxyl group, a liquid oil, and water, and a powder having a refractive index difference of 0.1 or less with the liquid oil. The present invention provides a skin cleansing agent containing body parts.

In the present invention, one-phase type refers to O/W emulsion or W
10 It refers to something that is not an emulsion but has a transparent or translucent appearance. Here, transparent or translucent means that the transmittance exceeds 30% when the sample is placed in a 1 cm square glass cell and the transmittance at 560 nm is measured.

Examples of the hydrophilic nonionic surfactant used in the present invention include those having an HLB of 9 or more, and specifically, polyoxyethylene alkyl ether, polyoxypropylene alkyl ether, polyoxyethylene alkylphenyl ether, polyethylene Glycol fatty acid ester, ethylene oxide derivative of propylene glycol fatty acid ester, polyoxyethylene sorbitan fat 112
esters, ethylene oxide derivatives of mono- or polyglycerin fatty acid esters, ethylene oxide derivatives of trimethylolpropane fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyoxyethylene hydrogenated castor oil pyroglutamic acid esters, Polyoxyalkylene type nonionic surfactants such as oxyethylene glyceryl pyroglutamate; sucrose fatty acid esters; alkyl glucosides such as decyl glucoside, dodecyl glucoside, decyl polyglucoside, dodecyl polyglucoside; polyglycerin fatty acid esters; Examples include glycerin alkyl ethers. These are nonionic surfactants whose hydrophobic groups, such as alkyl groups, phenyl groups, and sushi fatty acid residues, have 8 to 36 carbon atoms.

Among these, in particular, polyoxyethylene alkyl ether, polyoxyethylene sorbitan fatty acid ester,
Polyoxyethylene hydrogenated castor oil and the like are preferred. In addition,
HLB is the balance between hydrophilicity and lipophilicity, and in the present invention, the value calculated by the following formula by Koide, Teramura et al. was used.

Among the hydrophilic nonionic surfactants, ethylene oxide adducts of Guerbet type alcohols having an HLB of 9 or higher are particularly preferred.

Hydrophilic nonionic surfactants may be used alone or in combination of two or more. Hydrophilic nonionic surfactants are
1 to 30% by weight (based on the total composition of the skin cleanser of the present invention)
(hereinafter simply expressed as %), particularly preferably in a range of 5 to 25%. If it is less than 1%, the detergency and washability of the composition will be insufficient, and if it exceeds 30%, the composition may thicken or solidify, which is not preferable.

Examples of water-soluble compounds having a hydroxyl group used in the present invention include propylene glycol, isoprene glycol (manufactured by Kuraray), 1,3-butanediol, dipropylene glycol, glycerin, diglycerin, triglycerin, polyglycerin, and trimethylol. Propane, erythritol, pentaerythritol, sorbitan, sorbitol, glucose, maltitol, saccharose, trehalose, ethylene oxide or propylene oxide adducts of sugars or sugar derivatives, polyethylene glycol, ethanol, etc., especially glycerin, sorbitol, maltitol, Preferred are ethylene oxide adducts of sugar derivatives such as polyoxyethylene methyl glucoside, and ethanol. These may be used alone or in combination of two or more. ) The amount of the water-soluble compound having a k acid group varies depending on the feeling of use, consistency, etc. of the composition, but it is preferably blended in an amount of 1 to 50%, particularly 3 to 30%, based on the total composition of the skin cleanser of the present invention. is preferred. Among these, ethylene oxide or propylene oxide adducts of sugar derivatives have the effect of eliminating the heat sensation, stickiness, etc. caused by oil and the like and significantly improving the feel during use. Particularly preferred is methyl glucoside ethylene oxide 1
Mention may be made of 0 to 30 molar adducts. If the compound is expected to have an effect as a feel improver, it should be added to skin cleansing materials.
% or more is desirable.

The liquid oil used in the present invention may be one commonly used in cosmetics and the like. The liquid here refers to something that is liquid or paste at 25°C, and includes, for example, hydrocarbons, higher alcohols, higher alcohol higher fatty acid esters, animal and vegetable oils, cholesterol fatty acid esters, silicones, etc. Preferred examples include liquid paraffin, squalane, polyisobutyne, isostearyl cholesteryl ester, 2-ethylhexanoic acid triglyceride, hexadecyl 2-ethylhexanoate, octadecyl myristate, olive oil, and diluted or cyclic methylpolysiloxane. .

These may be used alone or in combination of two or more. The liquid oil is 1 to 1% of the total composition of the skin cleanser of the present invention.
It is preferable to mix 90%, especially 30 to 80%.

In addition, the amount of water can be appropriately selected depending on the purpose of use of the skin cleansing agent of the present invention, required physical properties, etc.
It is preferable to mix it in an amount of 90% to 30%, particularly 3 to 30%.

The powder used in the present invention can be obtained by selecting a powder that has a small difference in refractive index from the liquid oil used, that is, one in which this difference is 0.1 or less, preferably 0.05 or less. It is possible to make the appearance of the cleaning agent transparent or semi-transparent.

The powder used in the present invention preferably has a refractive index in the range of 1.35 to 1.63, which is close to the refractive index of the oil component, and specifically, silicic acid, silicic anhydride,
Calcium silicate, magnesium silicate, aluminum silicate, barium silicate, strontium silicate, talc, kaolin, sericite, mica, bentonite, vermiculite, diatomaceous earth, magnesium oxide, calcium carbonate, magnesium carbonate, hydroxyapatite, zeolite, ceramic powder, metal tungstate Inorganic powder consisting of one or more composites of inorganic compounds such as salts and barium sulfate; polyamide, polyester, polyether, polyol, polyolefin, polystyrene, polyurethane, polysulfone, vinyl resin, urea resin, phenol Resin, fluorine resin, silicone resin, acrylic resin,
Melamine resin, epoxy resin, polycarbonate resin,
Terpene resin, shellac resin, sulfur resin, divinylbenzene/styrene copolymer, celluloid, cellulose,
Examples include organic powders made of one or more copolymers of organic compounds such as cellulose derivatives, polysaccharides, proteins, and hard proteins. These may be monodisperse particles, secondary particles or composite particles.

Among these, particularly preferred are squalane, 2-ethylhexanoic acid triglyceride, etc. (n = about 1.44) as the liquid oil, and the difference in refractive index with these liquid oils is 0. Powders in IJJ, such as silicic acid, silicic anhydride, calcium silicate, magnesium silicate, aluminum silicate, barium silicate, strontium silicate,
Inorganic powder consisting of one or more composites of inorganic compounds such as diatomaceous earth and calcium carbonate; polyamide, polyester, polyether, polyol, polyolefin, polyurethane, vinyl resin, fluorine resin, silicone resin, acrylic resin, Examples include organic powders made of one or a composite of two or more organic compounds such as celluloid, cellulose, cellulose derivatives, and polysaccharides.

The average particle diameter of the powder is preferably 0.1 to 500 μm, particularly 5 to 250 μm. Average particle size is 500
If it exceeds .mu.m, there will be a feeling of discomfort during use, and if it is less than 0.1 .mu.m, no physical cleaning effect will be obtained.

Among these powders, those having a refractive index difference of 0.1 or less with the liquid oil used are selected and used.

The amount of powder is 0, 1 to 1, based on the total composition of the skin cleanser of the present invention.
It is preferable to mix 20%, especially 0.2 to 10%.

The skin cleansing agent of the present invention further contains a nonionic surfactant having an HLB of 3 or more and less than 9 or a branched fatty acid having 14 to 60 carbon atoms, so that there is less thickening due to water contamination, and it spreads easily. It can be raised within the layer.

As such a nonionic surfactant having an HLB of 3 or more and less than 9, as long as the HLB is within this range, the same examples as the hydrophilic nonionic surfactant having an HLB of 9 or more may be used. can be used. Such nonionic surfactants whose HLB is in the range of 3 or more and less than 9 are used alone or in combination of two or more, and the total composition of the cleansing composition of the present invention contains 0.
It is preferably blended in a range of 5 to 20%, particularly 1 to 10%. If it is less than 0.5%, the reduction in viscosity, improvement in spreadability, etc. will be insufficient, and if it is more than 20%, the effect will not increase much.

In addition, as a branched fatty acid having 14 to 60 carbon atoms, the general formula (
I) CH, -GoC+VCOOH (I) (wherein p R1 and R2 may be the same or different, each represents a hydrogen atom or an alkyl group having 1 to 50 carbon atoms, at least one of which has a carbon number of It is an alkyl group having 1 to 50 carbon atoms, and p has a total number of carbon atoms in the molecule of 14 to 6.
Indicates an integer that is 0. ) is preferred.

The alkyl groups for R1 and R2 in the formula may be straight or branched, and include, for example, those shown below.

CH3, CH-[:R2, CH-CH2CH2, CH3
(CH2) 5CH3(CH2) 4−+ CH, (C
112) 5−+ CH,, (CH2)6CH3(CH
2)? -,CH3(CH2) e-,CL(CH,
) 9CH3(C11,) ,0-,CH3(CH2)
1. -, CH3 (C112) , -CH5 (CH2
)24 , CH3(CH2)29 , CH3(CH
2) 3--CH, (C112) ff9-, CH3(C
H2) 4. -, CH3(CH2) 49H3 C11,CHCl1゜CH2CH2CH2[:H,CH
2[:H2CH3C)I3CH,CCl1. CHC) I2C112H3 Examples of branched fatty acids (I) include 2-propyl undecanoic acid, 2-ethyl tritectanoic acid, 2-propyl dodecanoic acid, 2-butyl undecanoic acid, 2-pentyl decanoic acid,
2-hexylnonanoic acid, 2-butylundecanoic acid, 2-
Butylundecanoic acid, 2-pentylundecanoic acid, 2-
Hexylnonanoic acid, 2-butyltridecanoic acid, 2-pentyldodecanoic acid, 2-hexylundecanoic acid, 2-hebutyldecanoic acid, 2-pentyltridecanoic acid, 2-hexylundecanoic acid, 2-hebutylundecanoic acid , 2-heptylundecanoic acid, 2-octyltecanoic acid, 2-octylundecanoic acid, 2-decyltetradecanoic acid, 2-decylpentadecanoic acid, etc. fatty acids obtained via Garpet reaction or aldol condensation, R', R2 Methyl branched fatty acids in which one is a methyl group and the other is a hydrogen atom, 5
．． 7. Examples include hyperbranched fatty acids such as 7-trimethyl-2-(1,3,3-)limethylbutyl)octanoic acid.

The branched fatty acid content is 0 in the total composition of the skin cleanser of the present invention.
．． It is preferably blended in an amount of 5 to 20%, particularly 1 to 10%.

If it is less than 0.5%, the reduction in viscosity, improvement in spreadability, etc. will be insufficient, and if it is more than 20%, the effect will not increase much.

The skin cleansing agent of the present invention is produced by mixing the above-mentioned components in a composition that forms a gel or liquid state. Such a blending composition can be appropriately determined by a blending test of each component usually performed by experts in this field. The basic points that must be kept in mind when selecting the composition are selecting the type, amount, and mixing ratio of the water-soluble compound that maximizes the association of surfactant molecules when forming the cleaning agent of the present invention; The goal is to maintain the balance of refractive index between liquid oil and powder. In addition, its production is usually done by mixing and melting each component other than the powder at a temperature above their melting points, cooling this to around room temperature while stirring, and adding the powder at any stage. It will be done. The skin cleanser of the present invention is not an emulsified composition consisting of two phases, a dispersed phase and a continuous phase, but a gel or liquid composition having a uniform one-phase region in which powder is dispersed.

The skin cleanser of the present invention further includes ionic surfactants, medicinal agents, moisturizing ingredients, anti-inflammatory agents, bactericidal agents, preservatives, ultraviolet absorbers, antioxidants, etc. commonly used in cosmetics, pharmaceuticals, etc.
Other organic and inorganic powders, pigments, fragrances, etc. can be added as necessary. Furthermore, solid oil or semi-solid oil can be added within a range that does not impair the effects of the invention.

The skin cleansing agent of the present invention is used for cleansing, pine surgery, etc., and is particularly preferably used as a facial cleansing agent for removing make-up cosmetics.

When used as a cleansing agent, it is preferable to apply the present skin cleansing agent to the skin and then rinse it off to remove it.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.

In addition, in order to evaluate the permeability of the appearance, the sample was placed in an ICm glass cell and the transmittance at 560 nm was measured.

Example 1 A cleansing cosmetic was prepared by heat-melting, mixing, and cooling all the components having the composition shown in Table 1, and was evaluated for detergency, feeling of use, appearance, and properties. The results are shown in Table 1.

(Evaluation method) Five panelists applied each cleansing cosmetic to skin with oil-based makeup, and after pine surgery, evaluated the cleansing power (removal of makeup) and feeling of use when rinsing with water according to the following criteria. In addition, its appearance and properties were observed.

Evaluation criteria: ◎ Very good ◎ Good △ Average × Bad Below margin Example 2 Facial cleanser: A facial cleanser was prepared by heating and dissolving all the components in the composition below, mixing and cooling them.

(%) A cleansing cosmetic was prepared by heating, dissolving, mixing, and cooling all the components of the following composition.

(%) Olive oil (n = 1.46) Squalane (n = 1.45) Glycerin Propylene glycol cyphthyl hydroxytoluene Methyl paraben Butyl paraben Water permeability T = 50% Example 3 Cleansing cosmetics: Sorbitol 10.0 27. 0 27.0 10.0 1.0 Isostearic acid 5,0 Cyphthyl hydroxytoluene 0.1 Methylparaben 0.1 Butylparaben
0.1 Fragrance 0.1 Ethanol 1.0 Water
Balance transmittance T=
47% This cleansing cosmetic has a translucent appearance and is aesthetically pleasing. Furthermore, because it is in a gel state, it can disperse and dissolve dirt on the skin, and the particles it contains have excellent physical (mechanical) cleaning effects. After cleansing, it could be washed away with just water.

Example 4 Cosmetic composition for pine surge: A cosmetic composition for pine surge was prepared by heating and dissolving all the components of the following composition, mixing and cooling operations.

(%) Polyisobutyne (trimer) (n = 1.45) 24
．． 0 Glycerin 9.0 Methylparaben 0.1 Butylparaben Fragrance Ethanol water 0.1 0.1 1, [) Balance transmittance T = 56% This cosmetic for pine surgery has a translucent appearance and excellent aesthetics, and also contains The particles had an excellent physical (mechanical) pine surge effect, and furthermore, after the pine surge was completed, it could be washed away sufficiently with just water.

〔Effect of the invention〕

The skin cleansing agent of the present invention is in the form of a transparent or translucent gel or liquid that is easy to handle, and has an excellent feeling of use such as spreading and slipping when applied to the skin, and also penetrates into the fine details of the skin. It has good properties and also has a physical cleaning effect due to the powder.

In addition, it does not easily thicken even when moisture is mixed in from the outside, and it can be applied to pine while maintaining a smooth feel during application. Furthermore, when water is added, the oil component becomes extremely fine oil-in-water emulsion particles and is easily removed from the skin along with makeup and other dirt, so it can be washed off and used without leaving any base components behind. It has excellent strength and washability, and provides a light feel when using it.

that's all

Claims (1)

[Claims] (1) A one-phase composition containing a hydrophilic nonionic surfactant, a water-soluble compound having a hydroxyl group, liquid oil and water, and a powder whose refractive index difference from the liquid oil is within 0.1. Contains skin cleansing agent.