JP3409194B2 - Oil-in-water cosmetics - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-in-water cosmetic containing a powder, which has good spreadability, excellent emollient properties, moisturizing feel, and the like, and is easy to use and has a long duration of makeup. .

[0002]

2. Description of the Related Art Conventionally, various surfactants have been blended as an emulsifier for preparing an oil-in-water emulsion cosmetic, a dispersant for dispersing powder in the cosmetic, and a wetting agent. . However, in these systems, problems such as deterioration of makeup persistence and stickiness due to reduction of water resistance and oil resistance due to the surfactant have been problems. On the other hand, there was a system of only water and powder without using a surfactant, but this was a
There were drawbacks such as a squeaky feeling, a feeling of dryness after evaporation of water, and lack of durability of makeup. In addition, there were cosmetics in which water and oil were mixed without emulsification and the powder was dispersed and shaken at the time of use, but this is not convenient in terms of shaking when used, and spreads and spreads. The feeling of use was not always satisfactory.

[0003]

As a method for improving the above-mentioned drawbacks, a technique of dispersing an oil-soluble ultraviolet absorber or powder in water using an alkyl-modified carboxyvinyl polymer has been disclosed (Japanese Patent Laid-Open No. Hei. 97644). However, in that case, if the powder was untreated or hydrophobized, the dispersibility was good if it was a small amount, but the dispersibility was not sufficient if a large amount of the powder was blended. Therefore, there has been a demand for a cosmetic that can sufficiently exhibit the effect of powder and does not cause aggregation or color change during use.

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventor has found that when silica-coated powder is used in a system using an alkyl-modified carboxyvinyl polymer, the dispersibility of the powder is improved. The present invention has been completed by finding out that it has improved, good usability, convenience, and durability of makeup.

That is, the present invention provides the following component (a),
(B), (c) and (d): (a) Alkyl-modified carboxyvinyl polymer 0.01 to 3.0% by weight (b) Oil content 1 to 60% by weight (c) Silica-coated powder 1 to 40% by weight (D) An oil-in-water cosmetic, which comprises 30 to 95% by weight of water.

The alkyl-modified carboxyvinyl polymer (a) used in the present invention is a pentaerythritol derivative.
Cross-linked with ryl ether or sucrose allyl ether
And an alkyl acrylate having 10 to 30 carbon atoms
With acrylic acid or methacrylic acid or their single esters
Is a copolymer of. This is carbon balls 1342, Pemulen TR I, (both, Goodrich Co., Ltd.) Pemulen TR II that have been marketed as. 1 as required
One kind or a combination of two or more kinds can be used.
The amount of the alkyl-modified carboxyvinyl polymer used in the present invention is 0.01 to 3.0%, particularly 0.1 to 1.0%.
When used in this range, the dispersibility of oil and powder, the durability of makeup, and the stability of the system are improved.

As the oil component (b) used in the present invention,
As long as it is usually used for cosmetics, any
For example, vegetable oils such as olive oil and castor oil, beeswax,
Waxes such as candelilla wax, wooden wax, hydrocarbons such as liquid paraffin, squalane, vaseline, paraffin wax, higher alcohols such as cetanol, stearyl alcohol, behenyl alcohol, perfluoropolyether, perfluorodecalin, perfluorooctane, etc. Fluorine-based oils, glycerin fatty acid esters, ester oils such as triglyceride, lanolin, silicone oils and the like can be mentioned. The amount of these oil components is 1 to 6
0% is preferable. If it is less than 1%, the feeling of use such as emollient, and the effects such as makeup lasting cannot be sufficiently obtained.
Even if it is mixed in excess of%, the effect is not improved much.

Silica-coated powder (c) used in the present invention
As a core material, a cosmetic powder such as an extender pigment or a coloring pigment is used as a core material and coated with silica. The cosmetic powder referred to in the present invention may be any as long as it is usually used in cosmetics, for example, talc, mica, kaolin, magnesium carbonate, calcium carbonate, aluminum silicate,
Extender pigments such as magnesium silicate and calcium silicate,
Titanium oxide, zinc oxide, red iron oxide, yellow iron oxide, black iron oxide , sunflower , konjac , titanium oxide / iron oxide composite
Examples thereof include inorganic color pigments such as pigments, organic pigments such as tar pigments and natural pigments, pearl agents such as titanium mica, titanium iron oxide mica, bismuth oxychloride, and organic powders such as nylon powder and silk powder. These can be used alone or in combination of two or more, if necessary. In addition, as these powders, those which have been surface-treated in advance with, for example, alumina, zirconium oxide, etc. before silica coating may be used.

The silica used for the coating treatment may be crystalline or amorphous. There are various methods of coating the cosmetic powder with silica, for example, a method of adding or generating an active silica sol to an aqueous suspension of the cosmetic powder, silica as a core material of the cosmetic powder and wet or A method using a mechanochemical reaction in which dry-mixing and pulverization is performed can be used. Further, the silica-coated powder may be surface-treated with a dispersant such as polyacrylic acid as long as the characteristics of silica are not impaired.

The composition ratio of the cosmetic powder and silica used in the present invention is arbitrarily selected depending on the powder to be coated.
The weight ratio is preferably 99: 1 to 40:60, more preferably 95: 5 to 60:40. The covering state may be partial, complete, or any state. The content of the silica-coated powder is preferably 1 to 40%, more preferably 2 to 35%. If it is less than 1%, the coloring power, makeup effect, makeup lasting, etc. cannot be sufficiently obtained, and exceeds 40%. It is not preferable because the feeling of use such as stretching and spreading deteriorates, and the thickness of the cosmetic film increases to increase the burden on the skin.

The amount of water (d) used in the present invention is
30 to 95% is preferable.

The cosmetics of the present invention include fragrances, preservatives, moisturizers, medicinal ingredients, ultraviolet absorbers, surfactants and emulsion stabilizers used in conventional cosmetics within the range that does not impair the effects of the present invention. , A water-soluble polymer, a water-swelling clay mineral, a PH adjusting agent and the like can be added. However, from the viewpoint of stickiness and skin irritation, it is desirable not to add an ordinary surfactant.

The present invention will be further described below with reference to examples. These do not limit the present invention in any way. Well
Also, in the examples, alkyl-modified carboxyvinyl polymer
As Carbo Ball 1342, Pemulen TR I or
Is Pemulen TR II (both manufactured by Goodrich)
It was used.

Examples 1 to 4 and Comparative Examples 1 to 2 Oil-in-water type cosmetics having the compositions shown in Table 1 were prepared, and sensory evaluations were conducted on the powder dispersibility, the feeling of use, and the naturalness of the cosmetic film. The results are also shown in Table 1. In addition, Examples 1-4
And Comparative Examples 1 and 2 are liquid foundations.

[0015]

[Table 1]

(Production Method) Examples 1 to 4, Comparative Examples 1 to 2 A. (2) to (4) are heated. B. (1), (5) to (13) and (15) are mixed and dispersed and heated. C. Mix A and B. D. (14) is added to C, neutralized, and filled in a container to obtain a product.

(Evaluation Method) For each evaluation item, the following 7-level (0 to 6) absolute evaluation was performed by a sensory test panel of 10 persons, and the average was further divided into 4 levels for evaluation.

(1) Absolute evaluation 6: Very good 5: good 4: Somewhat good 3: Normal 2: Somewhat bad 1: Bad 0: Very bad (2) 4-step evaluation 5.0-6.0: Very good: ◎ 3.0 to 4.9: Good: ○ 1.0 to 2.9: Slightly defective: △ 0 to 0.9: defective: ×

As is clear from the results shown in Table 1, the oil-in-water cosmetics of Examples 1 to 4, which are the products of the present invention, are comparative Examples 1 to 2.
It can be seen that, in comparison with the oil-in-water type cosmetics of No. 1, the powder has far superior properties in all of the powder dispersibility, the feeling of use, and the naturalness of the cosmetic film. In particular, the product of the present invention has good dispersibility even when a large amount of powder is blended, has good usability, convenience, and makeup lasting, and has no irritation to the skin, and is highly safe. Was given. On the other hand, in Comparative Example 1 in which the untreated pigment was blended, the dispersibility of the powder was poor, the powder agglomerated, the usability was bad, and the naturalness of the cosmetic film was not obtained. Further, in Comparative Example 2 in which the silica-coated powder was contained in a large amount, the feeling of use such as stretching and spreading was poor, and the cosmetic film became thick and a natural film was not obtained.

[0020] Example 5 Liquid foundation (moisturizing type) (Prescription)% by weight   1 Cetyl alcohol 0.3   2 Liquid paraffin 20   3 Vaseline 1   4 beeswax 2   5 Alkyl-modified carboxyvinyl polymer 1   6 1,3-butylene glycol 5   7 Polyethylene glycol 5   8 20% silica-coated titanium oxide 15   9 20% Silica-coated red iron oxide 1 10 20% silica coated yellow iron oxide 2.5 11 20% silica coated black iron oxide 0.8 12 Purified water Remaining amount 13 Fragrance suitable amount 14 Preservative Suitable amount 15 Triethanolamine 1

(Production Method) A: 1 to 5 are dispersed by heating. B: Mix 6-12 and heat. C: Mix A and B. D: Add 13 to 14 to C, then add 15 to neutralize,
Fill the container into the product.

In Example 5, the powder and oil are well dispersed, the spreadability on the skin is good, the feeling of use such as emollient property, the makeup effect and the durability of makeup are excellent.
It is a moisturizing foundation with no skin irritation.

[0023] Example 6 Liquid mascara (Prescription)% by weight   1 solid paraffin 8   2 Lanolin wax 8   3 Isoparaffinic hydrocarbons 30   4 Polyacrylic ester emulsion (30% aqueous solution) 30   5 Alkyl-modified carboxyvinyl polymer 0.5   6 Fragrance suitable amount   7 Preservative Suitable amount   8 5% silica coated black iron oxide 10   9 Purified water remaining 10 Triethanolamine 0.4

(Production Method) A: 1 to 3 are heated. B: 4 to 9 are mixed and dispersed and heated. C: Mix A and B. D: Add 10 to C to neutralize, and fill a container to obtain a product.

In Example 6, the dispersion state of powder and oil was good, the spreadability on the eyelashes was good, the makeup effect and the durability of makeup such as water resistance were excellent, and there was no skin irritation. It is a mascara.

[0026] Example 7 Skin color cream (Prescription)% by weight   1 Liquid paraffin 10   2 Vaseline 1   3 Glyceryl trioctanoate 5   4 1,3-butylene glycol 5   5 Glycerin 2   6 Alkyl-modified carboxyvinyl polymer 0.3   7 Carboxy vinyl polymer 0.3   8 30% silica-coated titanium oxide 5   9 Bengal 0.3 10 Yellow iron oxide 0.6 11 Black iron oxide 0.1 12 Purified water Remaining amount 13 Triethanolamine 0.5 14 Preservative Suitable amount 15 Perfume

(Production Method) A: 1 to 3 are heated. B: 4 to 12 are mixed and dispersed and heated. C: Mix A and B. D: Add 13 to C to neutralize. E: Add 14 to 15 to D, mix, and fill a container to obtain a product.

In Example 7, the powder and oil were well dispersed and spread well on the skin, the feeling of use such as moisturizing feeling, the makeup effect and the durability of makeup were excellent, and there was no skin irritation. It is a skin color cream.

[0029] Example 8 emulsion (Formulation) wt% 1 FOMBLIN HC-04 (Montefluos Co.) 20 2 5% perfluoroalkyl phosphoric acid ester diethanol amine oxide treated titanium 2 3 1,3-butylene glycol 15 4 alkyl-modified carboxy Vinyl polymer 0.3 5 40% silica-coated titanium oxide 2 6 Glycerin 5 7 Purified water Remaining amount 8 Perfume proper amount 9 Triethanolamine 0.3

(Production Method) A: 1 and 2 are mixed and dispersed. B: 3 to 7 are mixed and dispersed. C: Mix A and B. D: Add 8 to C and add 9 to neutralize, and fill a container to obtain a product.

Example 8 is a milky lotion in which the powder and oil are well dispersed, the spreadability on the skin is good, the moist feeling and the like are excellent, and the skin is not irritating.

[0032]

The cosmetic composition of the present invention is an excellent oil-in-water cosmetic composition which has good usability and convenience, dispersibility of powder, cosmetic effect and makeup lasting and has no skin irritation.

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Claims (2)

(57) [Claims] 1. The following components (a), (b), (c) and (d): (a) alkyl-modified carboxyvinyl polymer 0.01 to 3.0% by weight (b) oil 1 to 60% by weight (C) Silica-coated powder 1 to 40% by weight (d) Water 30 to 95% by weight, An oil-in-water type cosmetic composition characterized by the above-mentioned. 2. The composition ratio of cosmetic powder of the silica-coated powder as the component (c) and silica is 99: 1 to 40: 6 by weight.
The oil-in-water cosmetic composition according to claim 1, which is in a range of 0.