JPH04356415A - Cosmetic - Google Patents

Abstract

PURPOSE:To obtain a cosmetic, having high effects on suppression of stickiness and unpleasant feeling due to sweat and especially persistence of the effects. CONSTITUTION:A cosmetic obtained by blending (A) powder such as talc, kaolin, zinc flower, titanium dioxide, mica or sericite subjected to hydrophobizing treatment with a treating agent such as a metallic soap, a lipophilic surfactant, a silicone oil or a lipophilic polymer, preferably the silicone oil such as dimethylpolysiloxane, methylphenylpolysiloxane or methylhydrogenpolysiloxane with (B) a water absorbing polymer, preferably a polymer having >=2 liquid absorption, more preferably spherical powder having <=5mum, especially <=15mum average particle diameter in drying as essential ingredients at (1/20) to (1/0.1) weight ratio of the ingredients (A)/(B). The total amount of the blended ingredients (A) and (B) is 1-100wt.%, preferably 10-100wt.% in a powdery cosmetic and 0.5-50wt.%, preferably 10-40wt.% in a stock composition for a spray cosmetic. This cosmetic has the above- mentioned effects.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cosmetics for reducing stickiness caused by sweat, discomfort, etc. when applied to human skin.

0002

BACKGROUND OF THE INVENTION Conventionally, baby powder, antiperspirant deodorant spray, and the like have been used as cosmetics to reduce stickiness and discomfort caused by sweat. Such cosmetics usually contain clay minerals such as talc for the purpose of imparting a feeling of slippage on the skin.

Recently, various attempts have been made to suppress the stickiness immediately after spraying and after sweating and to improve the feeling of use. For example, talc having a plate crystal structure is blended as a clay mineral, ultrafinely pulverized talc is blended, and spherical particle powder is blended (Japanese Patent Application Laid-Open No. 52-99236
), blending volatile silicone into the oil component (JP-A-56-29912), blending talc whose surface has been made hydrophobic by silicone treatment (JP-A-62)
-164615) etc.

0004

[Problems to be Solved by the Invention] However, even with these improved techniques, the stickiness reducing effect is still insufficient, and furthermore, the sustainability of the effect is still not satisfactory. Therefore, an object of the present invention is to provide a cosmetic that is highly effective in suppressing stickiness and discomfort caused by sweat, and particularly has excellent sustainability of the effect.

[0005]

[Means for Solving the Problems] Under these circumstances, the inventors of the present invention have conducted extensive research and found that the combination of a hydrophobically treated powder and a water-absorbing polymer has an excellent effect of reducing stickiness caused by sweat and its sustainability. They discovered that cosmetics can be obtained and completed the present invention. That is, the present invention provides a cosmetic containing a hydrophobically treated powder and a water-absorbing polymer.

[0006] Powders used as raw materials for the cosmetics of the present invention include powders commonly used for cosmetics. Specifically, examples include talc, kaolin, zinc white, titanium dioxide, mica, sericite, etc. Among them,
Talc is preferred.

[0007] In the present invention, one or more of these powders are used after being subjected to hydrophobization treatment, and examples of the treatment agent include metal soaps, lipophilic surfactants, silicone oils, lipophilic polymers, etc. Among these, silicone oil is preferred. Preferred examples of such silicone oils include dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane.

[0008] The hydrophobization treatment of the powder is carried out according to a conventional method. For example, in the case of silicone oil treatment, it is preferable to use 1.0 to 5.0% by weight of silicone oil based on the powder. Specifically, it is preferable to spray 10 to 20% by weight of a 10% solution of silicone oil in methylene chloride onto the powder and perform a baking treatment at 100° C. for 2 hours. Further, the particle size and shape of the hydrophobized powder used in the present invention are not particularly limited, but the average particle size is 0.05 to 50.
A plate-like structure of μ is preferable.

[0009] The water-absorbing polymer used in the present invention is not particularly limited as long as it has the ability to absorb moisture, and examples thereof include carrageenan, gelatin, agar, gum tragacanth, viscose, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, and carboxylic acid. Examples include hydrogels derived from methylcellulose, polyvinyl alcohol, etc., stabilized by the addition of polyvalent metal salts.

Furthermore, acrylic acid or methacrylic acid [hereinafter abbreviated as "(meth)acrylic acid"], salts of (meth)acrylic acid such as sodium and ammonium;
meth)acrylamide; N-substituted (meth)acrylamide, 2-(meth)acryloylethanesulfonic acid or its salt, styrenesulfonic acid or its salt, 2-hydroxy(meth)acrylate, vinylpyrrolidone, vinylmethyl ether, polyethylene oxide ( Homopolymers such as meth)acrylic esters or crosslinked copolymers using two or more of these monomers; saponified vinyl acetate-methyl acrylate copolymers, saponified vinyl acetate-maleic acid copolymers , this half ester or half amide,
Saponified isobutylene-maleic anhydride copolymer, crosslinked products such as its half ester or half amide; saponified styrene-maleic anhydride copolymer, its half ester or half amide, starch-acrylic acid graft polymer, polysaccharide Examples include hydrolysates of -acrylic acid graft polymers and starch-acrylonitrile graft polymers.

[0011] As a method for forming a crosslinked product, the above monomer or monomer mixture is mixed with a polyfunctional vinyl monomer or with at least two functional groups other than vinyl groups in the molecule, such as an epoxy group. There is also a method in which the polymer is mixed with a crosslinking agent and polymerized by a known method to form a polymer having appropriate elasticity. In addition, after obtaining the homopolymer or copolymer, by reacting a crosslinking agent by a known method,
It can also be a polymer with appropriate elasticity.

Examples of the polyfunctional vinyl monomer used here include N,N'-methylenebisacrylamide, ethylene glycol diacrylate, ethylene glycol dimethacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, and trimethylolpropane triacrylate. Examples include acrylate. Examples of crosslinking agents having functional groups other than vinyl groups include:
Examples include glycidyl ether-based, isocyanate-based, maleimide-based crosslinking agents, etc. Glycidyl ether-based crosslinking agents include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerol diglycidyl ether, glycerol triglycidyl ether, triglycidyl isocyanurate, etc. As the isocyanate type, methylene bis(4-phenyl diisocyanate), 2,6-tridendiphenyl diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, xylidene diisocyanate, etc.; as the maleimide type, N,N'-1,4 Examples include, but are not limited to, phenylenediamine dimaleimide, N,N'-1,2 phenylenediamine dimaleimide, N,N'-hexamethylenediamine dimaleimide, N,N'-tetramethylenediamine dimaleimide, etc. It's not a thing. In addition, copolymers of the above hydrophilic monomers and hydrophobic monomers such as styrene (meth)acrylic acid esters can be used as long as the hydrophilicity is not significantly impaired. Polymers made from one or more of these are preferred, and particularly preferred are sodium acrylate polymers crosslinked with a crosslinking agent. The crosslinking agent for the sodium acrylate polymer used at this time is preferably ethylene glycol diglycidyl ether, and the amount used is preferably 3 to 7% by weight based on the sodium acrylate polymer.

[0013] The water-absorbing polymer used in the present invention preferably has a liquid absorption capacity of 2 or more; if the liquid absorption capacity is less than 2, sufficient stickiness reduction effect cannot be sustained. Note that the amount of liquid absorbed is determined by the following measurement method. Liquid absorption measurement method: After sufficiently swelling 1.0 g of polymer in a large excess of physiological saline, leave it for 30 minutes at room temperature, filter the gel part with filter paper, and measure the weight. The amount of saline (
g) is the amount of liquid absorbed. Further, the particle size and shape of the water-absorbing polymer are not particularly limited, but it is preferably spherical and has an average dry particle size of 50 μm or less, particularly 15 μm or less.

The cosmetic of the present invention contains a hydrophobized powder and a water-absorbing polymer in a weight ratio of hydrophobized powder/water-absorbing polymer=1.
It is preferable to mix it in a ratio of /20 to 1/0.1. If the blending ratio exceeds 1/0.1, the stickiness reducing effect will not last long enough, and if the blending ratio is less than 1/20, a sticky feeling due to the water-absorbing polymer will be observed. In addition, the amount of these ingredients incorporated into cosmetics varies depending on the dosage form, but
For example, in powder cosmetics, a total of 1 to 100% by weight,
Preferably 10 to 100% by weight, total 0.5 to 50% by weight in the stock composition of spray cosmetics, preferably 10 to 100% by weight.
It is 40% by weight.

The cosmetic composition of the present invention may contain antiperspirant substances, oil agents, bactericidal agents, astringents, fragrances, etc. within the range that does not impair the effects of the present invention. As the antiperspirant substance, any substance that is conventionally known to have an antiperspirant effect can be used, such as astringent aluminum or zirconium such as aluminum halide, aluminum hydroxyhalide, zirconyloxyhalide, and zirconylhydroxyhalide. Salts or astringent complexes thereof can be used alone or in mixtures. Among these, aluminum astringent salts are preferred, typically aluminum chloride, with the general formula Al2(OH)lXm
・nH2O (wherein, X represents a chlorine atom, bromine atom or iodine atom, l and m each represent a number from 2 to 5, l+
(m is 6, n is a number from 1 to 6), and in particular aluminum hydroxychloride [Al2(OH)lClm.
nH2O] is preferred. When an antiperspirant substance is added, the amount is 0.01 to 5% by weight in powder cosmetics.
, particularly preferably from 0.1 to 3% by weight, and in the stock composition of spray cosmetics, from 1 to 50% by weight, particularly preferably from 3 to 40% by weight.

The oil agent is not particularly limited as long as it is an oil commonly used in cosmetics, and examples include liquid paraffin, isopropyl myristate, isopropyl palmitate, squalane, 2-octyldodecyl myristate, neopentyl glycol-2-ethylhexano. ate, 2-octyldodecyl oleate, myristyl myristate, volatile cyclic silicones, and the like may be used alone or in combination of two or more, and combinations with cyclic silicones such as isopropyl myristate and isopropyl palmitate are particularly preferred. Here, as the cyclic silicone, a compound having 4, 5 dimethylsiloxanes, or a mixture thereof is particularly preferred. If an oil agent is added, the amount to be added is as follows:
In powder cosmetics, it is preferably 0 to 50% by weight, particularly 0 to 30% by weight, and in the stock composition of spray cosmetics, it is preferably 5 to 50% by weight.
50% by weight, especially 10-40% by weight is preferred.

[0017] Examples of the fungicide include triclosan and trichlorocarbanilide. The cosmetic composition of the present invention can be applied to the skin by mixing the above-mentioned components, but it can also be made into a spray type cosmetic composition. When used as a spray-type cosmetic, a suitable propellant is added to the cosmetic composition of the present invention, and the composition is filled into a sealed container equipped with an aerosol valve. The propellant is not particularly limited as long as it is a liquefied substance that is gaseous at normal temperature and pressure and is mutually insoluble with the solid components in the cosmetic composition of the present invention, but for example, carbonized propane, butane, etc. Hydrogen; Examples include halogenated hydrocarbons such as dichlorofluoromethane, 1,2-dichloro-1,1,2,2-tetrafluoroethane, trichloromonofluoromethane, and mixtures thereof. The amount of the propellant added is such that the amount of the cosmetic composition of the present invention is 2 to the total amount after addition.
It is preferably added in an amount of 50% by weight.

[0018]

[Effects of the Invention] According to the present invention, due to the action of both the hydrophobized powder and the water-absorbing polymer, a cosmetic is provided which has an excellent effect of reducing stickiness and discomfort due to sweat, and which also has an excellent long-lasting effect. .

[0019]

EXAMPLES Next, the present invention will be explained in detail with reference to Examples. Example 1 Powdered cosmetics having the composition shown in Table 1 were prepared, and the effect of reducing stickiness due to sweat was evaluated over time. The results are shown in Table 1. (Method) Apply a certain amount of powder evenly to the forearm,
The samples were placed in a room at 0° C. and 75% RH, and the degree of stickiness was sensory evaluated 3 and 5 minutes later, and scored according to the following criteria. 5... Quite sticky. 4...It's sticky. 3...Slightly sticky. 2...Not very sticky. 1...Not sticky at all.

[0020]

[Table 1] *1 Silicone-treated talc: Talc surface coated using 3% silicone oil (KF-96 50cs) based on talc (average particle size 6μ) *2 Water-absorbing polymer: Sodium polyacrylate polymer was crosslinked with ethylene glycol diglycidyl ether by the following manufacturing method (crosslinking agent concentration 5% by weight)

[
(Manufacturing method) As part A, 255 g of 80% acrylic acid aqueous solution was mixed with 280 g of 30% sodium hydroxide aqueous solution.
and diethylene glycol diglycidyl ether; Denacol EX810 (manufactured by Nagase Kasei Co., Ltd.)
10.2 g and 0.8 g of potassium persulfate were dissolved in 20 g of water, and sucrose monostearate; Ryoto Sugar Ester S-570 (Mitsubishi Chemical Foods Co., Ltd.
Co., Ltd.) was added to a solution prepared by dispersing 1 kg of cyclohexane, and the mixture was dispersed using a homomixer. On the other hand, as liquid B, 1
kg of cyclohexane is charged into a 5-liter reaction vessel equipped with a reflux condenser, a thermometer, a nitrogen inlet tube, a stirring bar, and a dropping funnel. After passing nitrogen into this reaction vessel and removing oxygen, 80±
The temperature was raised to 5°C, and while stirring, liquid A was added dropwise to liquid B from the dropping funnel. After dropping, aging is further performed for 2 hours. Thereafter, azeotropic dehydration is performed, and 1.5 liters of cyclohexane is further distilled off, followed by cooling. The produced polymer beads are dried under reduced pressure at 90°C to obtain 280 g of the polymer.

Cosmetics were produced in Examples 2 to 5 below. All of these were excellent in reducing stickiness caused by sweat and in its durability.

Example 2 Baby powder:
(% by weight) Silicone-treated talc (same as Example 1) 8
0.0 Water-absorbing polymer (same as Example 1)
19.8 β-Glycyrrhetinic acid
0.2

100.0

Example 3 Antiperspirant deodorant spray: Stock composition:
(weight%)
N-Lauroylglutamic acid treated talc
20.0 (manufactured by Miyoshi Kasei) Water-absorbing polymer (same as Example 1)
6.0 Volatile silicone (
Silicone SH-344) 3.0 Isopropyl myristate
30.0 Aluminum hydroxychloride 30.0 Triclosan
0.2 ethanol
10.8

Stock solution 100.0 Above stock solution: LPG=20:
It was sealed in a pressure container so that the weight ratio was 80 (weight ratio).

Example 4 Whole body antiperspirant powder lotion
(Weight%) Silicone-treated sericite*3
10.0 Water-absorbing polymer *4
10.0 Low viscosity silicone (Silicone KT-5) 5.0
aluminum hydroxychloride
1.0 Triclosan

0.1 Glycerin

5.0 Ethanol
50.
0 Purified water
18.9

100.
0*3 silicone-treated sericite; 3 for sericite
% of silicone oil (KF-96, 50cs), the water-absorbing polymer sodium polyacrylate copolymer (average particle size 3μ) *4 was coated with ethylene glycol diglycidyl ether using the following manufacturing method Crosslinked product (crosslinking agent concentration 5% by weight) (manufacturing method) Crosslinking agent amount 1250 ppm (relative to acrylic acid); 300 g of commercially available sodium polyacrylate powder and 2 kg of cyclohexane were placed in a reflux condenser, a thermometer, a stirring rod, and a dropping funnel. 5l attached
Pour into the reaction kettle. Next, while stirring, add 12 g of diethylene glycol diglycidyl ether; Denacol EX810 (manufactured by Nagase Kasei Co., Ltd.) to this mixture in 255 g of water.
After the dropwise addition, the temperature was raised to 80±5°C, and a crosslinking reaction was carried out for 3 hours. After that, azeotropic dehydration is performed,
Furthermore, 1.5 liters of cyclohexane was distilled off and the mixture was allowed to cool. The produced polymer beads are dried under reduced pressure at 90°C to obtain 300 g of the polymer.

Example 5 Foundation

Claims (1)

[Claims] 1. A cosmetic containing a hydrophobically treated powder and a water-absorbing polymer.