JP2010173997A - Cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-in-oil type cosmetic having excellent emulsion stability, touch feeling in use, and, especially, good spreadability. <P>SOLUTION: The water-in-oil type cosmetic contains a (styrene/butadiene) copolymer. The content of the (styrene/butadiene) copolymer in the cosmetic is preferably 1.0-10.0 mass%. The cosmetic having the good stability, the good touch feeling in use, and, especially, the excellent spreadability, non-sticky feeling and compatibility at coating can be obtained by formulating the (styrene/butadiene) copolymer with the cosmetic. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cosmetic comprising a (styrene / butadiene) copolymer.

  The emulsified composition is very useful as a cosmetic base or a skin external pharmaceutical base and has been widely used for a long time. Of these, oil-in-water cosmetics have been used because they have a refreshing feel due to their aqueous phase and often have a high water content. There are disadvantages such as being easy to flow through the composition and being difficult to percutaneously absorb the oily active ingredient.

  Water-in-oil cosmetics have overcome these drawbacks, but because the outer phase is oil, the emulsion particles cannot be coalesced and creaming suppressed using electrostatic repulsion, and the stability is insufficient. . In order to solve this problem, an external phase is prepared by blending an organically modified clay compound (Patent Documents 1 and 2), a dextrin fatty acid ester (Patent Documents 3 and 4), a solid / semi-solid fat (Patent Documents 5 and 6), etc. However, the improvement in usability has been desired because it has poor stickiness when applied to the skin and is sticky and oily.

JP 61-129033 A JP-A-9-2816 Japanese Patent Laid-Open No. 5-32520 JP 2000-72646 A JP 2008-247758 A JP 2004-224729 A

  For this reason, development of the water-in-oil emulsion composition and emulsified cosmetics with favorable stability and a good feeling of use was desired.

  As a result of intensive studies by the present inventors in order to solve the above-mentioned problems, the oil phase was thickened by blending with a (styrene / butadiene) copolymer, and the stability, feel in use, in particular, good spreading during application. The present inventors have found that a water-in-oil emulsion excellent in non-stickiness and familiarity can be obtained, and completed the present invention.

  That is, the cosmetic of the present invention is characterized by containing a (styrene / butadiene) copolymer.

  In the cosmetic, it is preferable to blend 1.0 to 10.0% by mass of a (styrene / butadiene) copolymer.

  According to the present invention, by blending a (styrene / butadiene) copolymer into a water-in-oil emulsion, the stability, feel in use, particularly good spreadability, no stickiness, and familiarity are excellent. Cosmetics can be obtained.

Hereinafter, preferred embodiments of the present invention will be described.
(A) (Styrene / Butadiene) Copolymer The (styrene / butadiene) copolymer used in the present invention includes, for example, ViscUp P (manufactured by Arch) as a commercial product.

  By blending the above (styrene / butadiene) copolymer into a cosmetic, it is possible to obtain a cosmetic excellent in stability, feel in use, in particular, good spreadability, no stickiness, and familiarity. In the cosmetic according to the present invention, the blending amount of the (styrene / butadiene) copolymer is preferably 1.0 to 10% by mass, and more preferably 3.0 to 8.0% by mass with respect to the entire composition. It is preferable. If the amount is less than 1.0% by mass, the effect of the blending may not be sufficiently exhibited.

  In the cosmetic according to the present invention, within the range not impairing the effects of the present invention, in addition to the essential components, water, oil, pigment, surfactant, moisturizer, which are usually blended as a base in cosmetics, Preservatives, fragrances, chelating agents, pH adjusters, antioxidants, ultraviolet absorbers and the like can be blended as lower alcohols, whitening agents, anti-inflammatory agents, various extracts, and ingredients that modify cosmetics.

The dosage form of the cosmetic of the present invention is arbitrary, and any dosage form such as a solution system, a solubilization system, an emulsification system, and a powder dispersion system may be used.

  As cosmetics of the present invention, for example, skin care products such as creams, emulsions, gels, packs, masks, hair care products such as permanent agents, hair dyes, bleaches, set agents, hair restorers, eyeliner, mascara, eyebrow, Examples include makeup products such as lip liners, foundations and makeup bases, shampoos, rinses, body soaps, cleaning products such as facial cleansers, and antiperspirants. These cosmetics can be produced according to a conventional method.

  The present invention will be described more specifically with reference to the following examples. In addition, this invention is not limited by this. As the (styrene / butadiene) copolymer, ViscUp P (manufactured by Arch) was used. The blending amount is expressed in mass% unless otherwise specified.

  First, the cosmetic evaluation method used in the following examples will be described. The application site of the cosmetic is the cheek.

Evaluation (1): Base stability
The cosmetics (water-in-oil emulsion) of each test example were allowed to stand at 50 ° C. for 4 weeks, and then the base stability was evaluated by visual observation for the following criteria.
<Evaluation criteria>
A: No change B: Oil droplets were observed after 4 weeks at 50 ° C. C: Separation after 4 weeks at 50 ° C. D: Separation immediately after production

Evaluation (2): Spreading at the time of application With regard to the spreading on the skin in use, evaluation was performed by 10 professional panels who actually used the cosmetics of the following test examples.
<Evaluation criteria>
A: Eight or more panel members felt that the spread during application was good.
B: 6 or more panelists and less than 8 panelists felt that the spread during application was good.
C: 3 or more panelists and less than 6 panelists felt that the spread during application was good.
D: Less than 3 panelists felt that the spread during application was good.

Evaluation (3): No feeling of stickiness During the use, evaluation was performed by 10 professional panels who actually used the cosmetics of the following test examples.
<Evaluation criteria>
A: More than 8 panelists felt that there was no stickiness during use.
B: 6 or more and less than 8 panelists felt that there was no stickiness during use.
C: 3 or more and less than 6 panelists felt that there was no stickiness during use.
D: Less than 3 panelists felt that there was no stickiness during use.

Evaluation (4): Familiarity Familiarity during use was evaluated by 10 professional panels who actually used the cosmetics of the following test examples.
<Evaluation criteria>
A: Eight or more panelists felt familiar during use.
B: 6 or more and less than 8 panelists felt that familiarity was good during use.
C: 3 or more panelists and less than 6 panelists felt familiar during use.
D: Fewer than 3 panelists felt familiar during use.

  The present inventors manufactured cosmetics by the conventional method in the composition shown below, and performed evaluation tests on the evaluation items (1) to (4). The results are shown in Table 1 below. Each formulation was prepared by the following method. After the B phase was uniformly mixed with a homogenizer, the stirred C phase was added, and the A phase was added for adjustment.

  From the results of Table 1 above, when dextrin palmitate is added (Example 2), although there is a base stability, it is not a satisfactory result with respect to spreading, stickiness, and familiarity at the time of application. It was. On the other hand, when (styrene / butadiene) copolymer is blended in an amount of 1.0% to 10.0% by mass (Test Examples 4 to 7), the stability of the base, the feeling of use (no spread on the skin, no sticky feeling, familiarity) An excellent base was obtained. Compared with this, in the case of unblending (Example 1) and 0.5 mass% (Example 3), the base stability was inferior. This is presumably because the viscosity of the outer phase (oil phase) was low, and coalescence and creaming of the emulsified particles occurred. When the blending amount exceeded 10.0% by mass (Test Example 8), poor spread, stickiness, and unfamiliarity with increasing polymer blending amount were felt.

  Although the formulation example of the cosmetics of this invention is given to the following, the technical scope of this invention is not limited by these. The (styrene / butadiene) copolymer used was ViscUp P (manufactured by Arch). Unless otherwise specified, all the amounts are mass%.

Formulation Example 1: Emulsion A phase (1) Liquid paraffin Residue (2) Cetyl 2-ethylhexanoate 11.0
(3) Decamethylcyclopentasiloxane 4.0
(4) Polyglyceryl diisostearate 0.7
(5) (Styrene / Butadiene) Copolymer 3.0
(6) Squalane 2.0
(7) Diparamethoxycinnamic acid mono-2-ethylhexanoate glyceryl 0.05
(8) Macadamia nut oil 2.0
(9) Tocopherol acetate 0.05
Phase B (10) Purified water Appropriate amount (11) 1,3-butylene glycol 5.0
(12) edetate trisodium 0.05
(13) Glycerin 5.0
(14) Preservative appropriate amount (15) Sodium chondroitin sulfate 0.1
(16) Sodium hyaluronate 0.1
(17) Maltitol solution 2.0
(18) L-ascorbic acid sulfate disodium 0.1
(19) α-Tocopherol 2-L-ascorbic acid phosphate diester potassium 0.1
(Manufacturing method)
After the A phase and the B phase are each heated to 70 ° C. and dissolved, the B phase is added to the A phase and emulsified using an emulsifier to obtain the desired emulsion.

Formulation Example 2: Emulsion A phase (1) Liquid paraffin Residue (2) Glyceryl tri-2-ethylhexanoate 14.0
(3) Methylphenylpolysiloxane 4.0
(4) Polyglyceryl diisostearate 0.6
(5) (Styrene / Butadiene) Copolymer 2.5
(6) Diparamethoxycinnamic acid mono-2-ethylhexanoate glyceryl 0.05
(7) Olive oil 2.0
(8) Tocopherol acetate 0.05
Phase B (9) Purified water Appropriate amount (10) Dipropylene glycol 5.0
(11) Edetate disodium 0.05
(12) Glycerin 5.0
(13) Preservative appropriate amount (14) sodium chondroitin sulfate 0.1
(15) Erythritol 0.2
(16) Sodium hyaluronate 0.1
(17) Maltitol solution 2.0
(18) L-ascorbic acid sulfate disodium 0.1
(Manufacturing method)
After the A phase and the B phase are each heated to 70 ° C. and dissolved, the B phase is added to the A phase and emulsified using an emulsifier to obtain the desired emulsion.

Formulation Example 3: Cream A phase (1) Liquid paraffin Residue (2) Cetyl 2-ethylhexanoate 14.0
(3) Methylphenylpolysiloxane 2.0
(4) Polyglyceryl diisostearate 0.6
(5) (Styrene / Butadiene) Copolymer 5.0
(6) Squalane 2.0
(7) Grape seed oil 1.0
(8) Tocopherol acetate 0.05
Phase B (9) Purified water Appropriate amount (10) 1,3-butylene glycol 5.0
(11) Trisodium edetate 0.05
(12) Glycerin 3.0
(13) Preservative appropriate amount (14) sodium chondroitin sulfate 0.1
(15) Sodium hyaluronate 0.1
(16) Maltitol solution 2.0
(17) L-ascorbic acid sulfate disodium 0.1
(Manufacturing method)
After the A phase and the B phase are each heated to 70 ° C. and dissolved, the B phase is added to the A phase and emulsified using an emulsifier to obtain the desired emulsion.

Formulation Example 4: Sunscreen cream A phase (1) Decamethylcyclopentasiloxane Residue (2) 2-Ethylhexyl paramethoxycinnamate 7.0
(3) Squalane 5.0
(4) Polyoxyethylene / methylpolysiloxane copolymer 2.0
(5) Trimethylsiloxysilicic acid 1.0
(6) (Styrene / Butadiene) Copolymer 2.5
(7) Diparamethoxycinnamic acid mono-2-ethylhexanoate glyceryl 0.5
(8) 4-t-butyl-4′-methoxydibenzoylmethane 0.1
(9) Silicone-coated fine particle titanium oxide (20 nm) 10.0
(10) Talc (hydrophobized product) 6.0
(11) Spherical polyethylene powder 5.0
(12) Perfume Appropriate amount (13) Preservative Appropriate amount Phase B (14) Dipropylene glycol 4.0
(15) edetate trisodium 0.02
(16) Purified water appropriate amount (production method)
After the A phase and the B phase are heated to 70 ° C. and dissolved, the A phase is added to the B phase and emulsified using an emulsifier. The obtained emulsion is cooled using a heat exchanger to obtain the desired cream.

Formulation Example 5: Sunscreen cream A phase (1) Decamethylcyclopentasiloxane Residue (2) Isododecane 5.0%
(3) 2-ethylhexyl paramethoxycinnamate 7.0
(4) Squalane 5.0
(5) Polyoxyethylene / methylpolysiloxane copolymer 2.0
(6) Trimethylsiloxysilicic acid 1.0
(7) (Styrene / Butadiene) Copolymer 4.5
(8) Diparamethoxycinnamic acid mono-2-ethylhexanoate glyceryl 0.5
(9) 4-t-butyl-4′-methoxydibenzoylmethane 0.1
(10) Silicone-coated fine particle titanium oxide (20 nm) 10.0
(11) Talc (hydrophobized product) 6.0
(12) Spherical polyethylene powder 5.0
(13) Perfume Appropriate amount (14) Preservative Appropriate amount Phase B (15) Dynamite glycerin 4.0
(16) Trisodium edetate 0.02
(17) Appropriate amount of purified water (production method)
After the A phase and the B phase are heated to 70 ° C. and dissolved, the A phase is added to the B phase and emulsified using an emulsifier. The obtained emulsion is cooled using a heat exchanger to obtain the desired cream.

Formulation Example 6: Foundation A phase (1) Decamethylcyclopentasiloxane Residue (2) Dodecamethylcyclohexasiloxane 5.0
(3) Dimethylpolysiloxane 3.0
(4) Polyoxyethylene / methylpolysiloxane copolymer 2.0
(5) (Styrene / Butadiene) Copolymer 4.0
(6) Palmitic acid 0.5
(7) Metal soap treated talc 2.0
(8) Cross-linked silicone powder (Trefil E-506) 0.1
(9) Bengala-coated mica titanium 0.5
(10) Dextrin fatty acid-treated talc 3.0
(11) Dextrin fatty acid-treated titanium dioxide 15.0
(12) Dextrin fatty acid-treated yellow iron oxide 3.0
(13) Dextrin fatty acid-treated black iron oxide 0.5
(14) Spherical nylon powder 1.0
(15) Spherical polyalkyl acrylate powder 3.0
(16) Tocopherol acetate 0.1
(17) δ-Tocopherol 0.1
(18) N-lauroyl-L-lysine 2.0
(19) Preservative appropriate amount phase B (20) purified water appropriate amount (21) 1 3-butylene glycol 5.0
(22) Glycerin 4.0
(23) Sodium L-glutamate 2.0
(24) Merirot extract 2.0
(Manufacturing method)
The A phase and the B phase were each heated to 70 ° C. and dissolved, and then the A phase was added to the B phase and emulsified using an emulsifier. The obtained emulsion is cooled using a heat exchanger to obtain the desired foundation.

Formulation Example 7: Makeup Cleansing Gel (1) (Styrene / Butadiene) Copolymer 6.5
(2) High oleic safflower oil Residue (3) Cetyl 2-ethylhexanoate 25.0
(4) Isododecane 10.0
(5) Methylphenylpolysiloxane 2.0
(6) Polyethylene glycol (20) triisostearate 10.0
(7) Dynamite Glycerin 1.5
(8) Alcohol 0.5
(9) Preservative appropriate amount (10) Purified water Appropriate amount (11) Fragrance Appropriate amount (Production method and evaluation)
(1) to (8) are mixed with stirring, and (9) and (10) are added. (11) is added to obtain a make-up cleansing gel.

Formulation Example 8: Makeup Cleansing Gel (1) (Styrene / Butadiene) Copolymer 7.0
(2) Liquid paraffin Residue (3) Glyceryl tri-2-ethylhexanoate 15.0
(4) Isododecane 10.0
(5) Methylphenylpolysiloxane 4.0
(6) Polyethylene glycol (8) diisostearate 3.5
(7) Polyethylene glycol (12) diisostearate 2.5
(8) Polyethylene glycol (10) monoisostearate 3.5
(9) 1,3-butylene glycol 1.5
(10) Alcohol 0.5
(11) Preservative appropriate amount (12) purified water appropriate amount (13) perfume appropriate amount (production method and evaluation)
(1) to (8) are mixed with stirring, and the mixture of (9) to (12) is added. (13) is added to obtain a make-up cleansing gel.

Formulation Example 9: Makeup Cleansing Cream
Phase A Ingredient (1) Liquid paraffin Residue (2) Cetyl 2-ethylhexanoate 10.0
(3) Isohexadecane 5.0
(4) Methylphenylpolysiloxane 5.0
(5) Diisostearin sun polyglyceryl 0.5
(6) (Styrene / Butadiene) Copolymer 5.0
(7) Lavender oil 0.05
(8) Preservative appropriate amount (9) Tocopherol acetate 0.05
Phase B (10) Purified water Appropriate amount (11) 1,3-butylene glycol 6.0
(12) Glycerin 8.0
(13) Trisodium edetate 0.05
(14) Erythritol 4.0
(15) Sodium hyaluronate 0.05
(Manufacturing method)
After the A phase and the B phase are each heated to 70 ° C. and dissolved, the B phase is added to the A phase and emulsified using an emulsifier to obtain the desired emulsion.

Formulation Example 10: Makeup Cleansing Cream
Phase A (1) Liquid paraffin Residue (2) Glyceryl tri-2-ethylhexanoate 4.0
(3) Pentaerythrityl tetra-2-ethylhexanoate 5.0
(4) Isohexadecane 5.0
(5) Methylphenylpolysiloxane 5.0
(6) Diisostearin sun polyglyceryl 0.5
(7) (Styrene / Butadiene) Copolymer 6.5
(8) Orange oil 0.05
(9) Preservative appropriate amount (10) Tocopherol acetate 0.05
Phase B (11) Purified water Appropriate amount (12) 1,3-butylene glycol 6.0
(13) Dipropylene glycol 8.0
(14) Trisodium edetate 0.05
(15) Erythritol 4.0
(16) Sodium hyaluronate 0.05
(Manufacturing method)
After the A phase and the B phase are each heated to 70 ° C. and dissolved, the B phase is added to the A phase and emulsified using an emulsifier to obtain the desired emulsion.

According to the present invention, by blending a (styrene / butadiene) copolymer into a water-in-oil emulsion, the stability, feel in use, particularly good spreadability, no stickiness, and familiarity were excellent. Cosmetics can be obtained.

Claims (2)

  A water-in-oil cosmetic containing a (styrene / butadiene) copolymer.   The water-in-oil cosmetic according to claim 1, wherein the content of the (styrene / butadiene) copolymer is 1.0 to 10.0% by weight.