JPH0789826A - Solid oily cosmetic - Google Patents

Abstract

PURPOSE:To obtain a solid oily cosmetic excellent in fitting feeling to skin, water resistance, sweat resistance and sebum resistance. CONSTITUTION:A solid oily cosmetic containing an oily component, wax and powder is compounded with 0.5-30wt.%, preferably 1-20wt.% of a copolymer of a polyvinyl pyrrolidone of the formula (R1 to R3 are 18-30C normal- or branched-cyclic alkyl or H; at least one of them is the above alkyl) and an alpha-olefin. The copolymer derived from the polyvinyl pyrrolidone having above mentioned alkyl of <=17C has decreased coat-forming capability and can not attain the improving effect of cosmetic durability and that of >=31C induces the elevation of melting point and is not suitable as an oil material of a cosmetic. Further, the content of alpha-olefin and vinylpyrrolidone in the copolymer contained as impurities is <=20wt.%, optionally 10wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel solid oily cosmetic composition which has never existed in the prior art, and more specifically, by blending a polyvinylpyrrolidone / α-olefin copolymer having film forming ability, it fits to the skin. The present invention relates to a completely new solid oily cosmetic having excellent feeling, water resistance, sweat resistance and sebum resistance.

[0002]

2. Description of the Related Art Solid oily cosmetics are mainly composed of oil, wax, powder, etc., and many studies have been conducted to obtain intended use characteristics and makeup retention characteristics depending on the type and adjustment amount of each. Came. However, since these solid oily cosmetics have a relatively high oil content, they are strong against makeup breakdown due to sweat and water, but they are liable to cause makeup breakdown due to sebum and are inferior in makeup lasting, and also have a good fit in terms of usability. It had a drawback that when it was tried to raise, the spread became heavy and it was difficult to keep it. For this reason, development of cosmetics having good makeup durability using silicone oil, and recently, cosmetics containing a fluorine-based oil component (JP-A-4-92012) have been developed. However, in all of these, the sebum secreted over time and the cosmetics were mixed, and it was not possible to prevent makeup breakdown. Therefore, it has an excellent feel,
Further, it has been desired to develop a solid oily cosmetic which is excellent not only in water resistance but also in oil resistance and which does not easily lose the agent such as sebum, the ultraviolet absorber, and other cosmetic ingredients.

[0003]

In view of such a current situation,
As a result of intensive studies, when a specific polyvinylpyrrolidone / α-olefin copolymer is blended in a solid oily cosmetic containing oil, wax, and powder, the fit is improved while maintaining the lightness of spread. Based on this finding, it is possible to obtain a solid oily cosmetic which is excellent not only in water resistance and sweat resistance but also in oil resistance, and in which there is very little loss of medicinal and cosmetic ingredients over time due to sebum. The present invention has been completed.

[0004]

Means for Solving the Problems That is, the present invention provides a solid oily cosmetic containing oil, wax and powder, which comprises polyvinylpyrrolidone / α represented by the general formula:
-The present invention relates to a solid oily cosmetic containing an olefin copolymer.

[0005]

[Chemical 2]

The structure of the present invention will be described below. The polyvinylpyrrolidone / α-olefin copolymer represented by the general formula 2 which is an essential component of the present invention exhibits a liquid to solid state at room temperature depending on the alkyl chain length,
It is a novel oil that has excellent oxidative stability, film-forming ability, low irritation to the skin and mucous membranes, and good feel.

In the above general formula 2, the alkyl group having 18 to 30 carbon atoms specifically includes octadecyl, nonadecyl, eicosyl, heneicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, nonacosyl, Each of the alkyl groups of triacontyl can be mentioned. When the alkyl group has 17 or less carbon atoms, the film-forming ability is lowered, and the object of the present invention to improve the durability of makeup cannot be achieved. On the other hand, an alkyl group having 31 or more carbon atoms raises the melting point and is not suitable as an oil agent for cosmetics.

The polyvinylpyrrolidone / α-olefin copolymer of the present invention contains a small amount of α-olephane and vinylpyrrolidone as impurities in addition to the above general formula 2, but in order to achieve the object of the present invention, these It is desirable that the amount of impurities is as small as possible. Α included as impurities
Specific examples of the olefin include octadecene, nonadecene, eicosene, heneicosene, docosene, tricosene, tetracocene, pentacocene, hexacocene, heptacocene, octacocene, nonacocene and triacontene. The content of these impurities is 20% by weight (hereinafter referred to as%) with respect to the polyvinylpyrrolidone / α-olefin copolymer of the present invention, and preferably 10%.
It is the following.

The solid oily cosmetic of the present invention contains 0.5 to 30%, preferably 1 to 20% of the polyvinylpyrrolidone / α-olefin copolymer represented by the general formula (Formula 2). is there. If it is less than 0.5%, the coating effect is not exhibited and the object of the present invention cannot be achieved. Also, 3
If it exceeds 0%, the spread of the solid oily cosmetic composition is significantly deteriorated,
It is unsuitable from the point of use.

The solid oily cosmetic of the present invention is one which has no fluidity and solidifies (including a paste) in the temperature range (0 to 50 ° C.) usually used as a cosmetic. The oil used in the present invention is one that is generally used in cosmetics having high skin safety, for example, liquid paraffin, squalane, castor oil, olive oil, jojoba oil, glyceryl diisostearate, glyceryl triisostearate. Rate, trimethylolpropane tri-2-ethyl isostearate, glyceryl tri-2-ethyl hexanoate, isopropyl myristate, cetyl-2-ethyl exoanoate, glyceryl triisostearate,
2-heptyl undecyl palmitate, methyl polysiloxane, methylphenyl polysiloxane, polybutene,
Examples include diisostearyl malate, lanolin, volatile cyclic silicone oil, volatile chain silicone oil, volatile hydrocarbon oil, perfluoropolyether, etc., and one or two or more of these are arbitrarily selected. It

The waxes used in the present invention are generally used in cosmetics, and include, for example, polyethylene wax, ceresin, solid paraffin, microcrystalline wax, petrolatum, bees wax, carnauba wax, candelilla wax, alkyl modified wax. Silicone wax and the like can be mentioned, and one kind or two or more kinds are arbitrarily selected from these. The compounding ratio of these waxes to the total composition of the solid oily cosmetic is generally 1 to 2
It is 0%, preferably 2 to 10%. If it is less than 1%, an appropriate hardness cannot be obtained, and stability problems such as oil separation phenomenon occur. On the other hand, if it exceeds 20%, the spread becomes extremely heavy.

The powders used in the present invention are generally used in cosmetics, and include, for example, talc, mica, kaolin, barium sulfate, aluminum oxide, magnesium carbonate, red iron oxide, yellow iron oxide, black iron oxide and ultramarine blue. , Carbon black, chrome oxide, titanium dioxide, zinc oxide, titanium mica, fish phosphorus foil, boron nitride, synthetic fluorine phlogopite,
Examples thereof include nylon powder, polyethylene powder, silicone powder, complex powder of fine powder and mica, and powders obtained by subjecting these powders to hydrophobic treatment with silicones, fatty acid esters, fluorine-based oil agents and the like. In the solid oily cosmetic of the present invention, in addition to the above components, if necessary,
Surfactants, humectants, ultraviolet absorbers, antioxidants, fragrances and the like are added. Of course, these must be used under qualitative and quantitative conditions that do not impair the effects of the present invention.

[0013]

EXAMPLES Next, the present invention will be described in more detail by way of examples. The present invention is not limited to these. The blending amount is% by weight.

Oily sunscreen stick foundations having the compositions shown in Table 1 below were prepared and evaluated.

[0015]

[Table 1] * 1 PVP / Eicosene Copolymer GAF ANTARON V-220 Main component In the general formula 2 described in the present specification, R ₁ and R
₃ , R ₄ , R ₅ are hydrogen atoms, R ₂ , R ₆ , R ₇ , R
₈ is a linear or branched alkyl group having 20 carbon atoms or a hydrogen atom, and at least one of R ₂ , R ₆ , R ₇ and R ₈ is
Represents a linear or branched alkyl group having 20 carbon atoms. * 2 PVP / triacontene polymer manufactured by GAF ANTARON WP-660 main component In the general formula 2 described in the present specification, R ₁ and R
₃ , R ₄ , R ₅ are hydrogen atoms, R ₂ , R ₆ , R ₇ , R
₈ is a linear or branched alkyl group having 30 carbon atoms or a hydrogen atom, and at least 1 of R ₂ , R ₆ , R ₇ and R ₈
Represents a straight chain or branched alkyl group having 30 carbon atoms. * 3 PVP / hexadecene polymer manufactured by GAF, ANTARON V-216 Main component In the general formula 2 described in the present specification, R ₁ and R
₃ , R ₄ , R ₅ are hydrogen atoms, R ₂ , R ₆ , R ₇ , R
₈ is a linear or branched alkyl group having 16 carbon atoms or a hydrogen atom, and at least 1 of R ₂ , R ₆ , R ₇ and R ₈
Represents a linear or branched alkyl group having 16 carbon atoms.

(Production method) After heating and melting 3 to 11, 12 to 1
Add 6 to disperse the dispersion. This is roller treated and heated to 85 ° C. 1-2 and 17 which have been heated and melted and mixed at 95 ° C. in advance are added thereto, and the mixture is deaerated after mixing. It was filled in a predetermined container and allowed to cool to obtain a stick foundation.

(Effect) The samples of Examples 1 and 2 and Comparative Examples 1 to 3 were evaluated for usability and makeup retention according to the following criteria. Sensory Evaluation (Feeling in Use) Ten expert panels performed official evaluation, and the following criteria were used to evaluate the fit, spread, freshness, and makeup retention (6 hours after application) during application. ⊚: 8 or more out of 10 answered that they were good. ◯: 6 to 8 or more out of 10 answered that they were good. B: 4 to 5 or more out of 10 answered that they were good. Poor: 3 or less of 10 respondents answered good. Water resistance and sebum resistance test (special test) A certain amount (2 mg / cm) on artificial leather (made by Mode Craft Co., Ltd.)
After applying the sample of 2) and stirring in water and artificial sebum for 10 minutes, the sample is taken out. This is washed with ethanol and a sample is extracted. Spectrophotometric system (HI
The amount of ultraviolet absorber was quantified by means of a TACHI U-3300 type double monochrome spectrophotometer), and the residual rate of each sample was determined by this.

[0018]

[Table 2]

As can be seen from Table 2, the oil-based stick foundation of Comparative Example 1 is inferior in makeup retention and especially in sebum resistance. Comparative Example 2 is a blend of the polyvinylpyrrolidone / α-olefin copolymer of the present invention and a coating agent having the same basic skeleton, but since the alkyl chain length is outside the range of the present invention, a comparison is made as a result. Although water resistance and sebum resistance tended to be better than those of Example 1, they were not satisfactory, and lacked in fit and refreshment. Furthermore, in Comparative Example 3 using the conventional silicone-based coating agent, the effect of improving makeup retention is about the same as in Comparative Example 2, and further in terms of usability,
In particular, it has a drawback that the spread becomes heavy.
On the other hand, in Examples 1 and 2 of the present invention, both water resistance and sebum resistance are excellent and makeup retention is good, and as a result, the sunscreen effect is excellent in durability, and the fit feeling is further
It was a completely new sunscreen stick foundation with good feeling of use such as spreadability.

[0020]

[Table 3]

(Production Method) After heating and dissolving 4 to 8, 9 to 13 are added and dispersed by disper. This is roller treated and heated to 85 ° C. It is heated and dissolved and mixed at 90 ° C. in advance, and 1 to 3 and 14 are added thereto, and after mixing, degassing is performed. It was filled in a predetermined medium dish, allowed to cool, and then loaded in a container to obtain a compact foundation.

(Effect)

[Table 4]

As is clear from Table 4, the compact foundation of Comparative Example 4 had a light spread but did not have a fit, was lacking in freshness, and had a very poor makeup retention. On the other hand, the compact foundation of Example 3 of the present invention was a completely new one having excellent fit feeling, excellent water resistance and sebum resistance, and excellent cosmetic durability.

Example 4 Transparent sunscreen stick foundation Raw material name Weight% 1. Paraffin wax 5 2. Carnauba wax 1. 3. Dimethyl silicone 5 4. Methylphenyl silicone 2 5. Liquid paraffin 16 6. Trimethylolpropane-tri- 2-Ethylhexanoate 5 7. Octyl methoxycinnamate 5 8. Octyl dimethyl PABA 3 9. 2-5 Ethylhexyl salicylate 3 10. Stearyl alcohol 5 11. Sorbitan monopalmitate 2 12. PVP / eicosene copolymer 15 13. Sodium stearate treated ultrafine titanium dioxide 3 14. Spherical PMMA powder 20 15. Plate barium sulphate 10 16. Perfume, antioxidant

After heating and dissolving 3 to 12, 13 to 15 are added and dispersed by a homomixer. This is subjected to TK mill treatment (wet pulverization) manufactured by Tokushu Kika, and heated to 90 ° C. 90 ° C in advance
Are dissolved and mixed by heating, and 1-2 and 16 are added thereto, and the mixture is degassed after mixing. It was filled in a predetermined stick container and allowed to cool to obtain a transparent stick-like foundation. The thus obtained prototype of Example 4 of the product of the present invention was a completely novel sunscreen stick foundation which was transparent and had a high anti-UV effect, and was excellent in sustainability of the effect.

Example 5 Sunscreen Lip Treatment 1. Candelilla wax 8 2. Ceresin 10 3. Squalane 18 4. Glyceryl diisostearate 16 5. Lanolin 21 6. PVP / eicosene copolymer * 1 12 7. Octyl methoxy Cinnamate 7.5 8. Olive oil 7.0 9. Pigment dispersion lake base (roller processed) 0.5 10. Fragrance, chemicals Amount * 1 GAF ANTARON V-220

(Production Method) After heating and dissolving 3 to 8, 9 is added to disperse the dispersion. It is heated and dissolved and mixed at 90 ° C. in advance, and 1 to 3 and 14 are added thereto, and after mixing, degassing is performed. It was filled in a predetermined stick container and allowed to cool to obtain the sunscreen lip treatment of the present invention.

[0028]

EFFECTS OF THE INVENTION The solid oil-based cosmetic composition of the present invention is excellent in fit while maintaining lightness of spread, and is also excellent in oil resistance as well as water resistance and sweat resistance. It is an epoch-making one that solves the problems of the conventional use of solid oil-based cosmetics, because the loss of components is extremely small.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shigenori Kumagai 1050 Shinba Town, Kohoku Ward, Yokohama City, Kanagawa Prefecture Shiseido Research Center No. 1

Claims (1)

[Claims] 1. A solid oily cosmetic containing oil, wax and powder, comprising a polyvinylpyrrolidone / α-olefin copolymer represented by the following general formula 1 as a solid oily product. Cosmetics. [Chemical 1]