JP2007230923A - Water-in-oil emulsified cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-in-oil emulsified cosmetic giving refreshing and light feeling and having excellent storage stability. <P>SOLUTION: The water-in-oil emulsion cosmetic contains (A) 0.3-4.0 mass% branched polyether-modified silicone expressed by general formula (1), (B) 65.0-80.0 mass% aqueous phase component, (C) an oil phase component containing a silicone oil as ≥50.0 mass% of the oil phase component and (D) sodium citrate and has viscosity of ≥20,000 mPa s at 30°C. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a water-in-oil emulsified cosmetic, and more particularly, to a water-in-oil emulsified cosmetic having a fresh and light feel and excellent storage stability.

A water-in-oil emulsion composition containing a branched polyether-modified silicone as an emulsifier and containing 65.0% by mass or more of an aqueous phase component is known for its advantages such as non-stickiness and refreshing feeling (for example, patents). References 1 and 2). However, among these, those having too many water phase components and those having a low viscosity do not provide satisfactory results in terms of storage stability.
JP 2003-81758 A JP 2003-286125 A

Accordingly, an object of the present invention is to provide a water-in-oil emulsified cosmetic having a fresh and light feel and excellent storage stability.

  The above object is achieved by (A) 0.3 to 4.0% by mass of a branched polyether-modified silicone represented by the following general formula (1),

[Wherein, R ¹ represents an alkyl group having 1 to 30 carbon atoms, an aryl group, an aralkyl group, a fluorine-substituted alkyl group, or a general formula (2) -C _m H _2m —O— (C ₂ H ₄ O) _d ( C ₃ H ₆ O) _e R ⁴ is the same or different organic group selected from organic groups represented by R ⁴ , and R ² is represented by the general formula (3) —C _n H _2n —O— (C ₂ H ₄ O _{) f (C 3 H 6 O} ) a polyoxyalkylene group represented by g -R ^{5, R 3} is represented by the following general formula (4)

Wherein R ⁴ is a hydrocarbon group having 4 to 30 carbon atoms or an organic group represented by R ⁷ — (CO) —, and R ⁵ is a hydrogen atom or a carbon atom having 1 to 30 carbon atoms. hydrogen radical or ^R 8 - (CO) - organic group represented by, ^{R 6} is an alkyl group having 1 to 30 carbon atoms, an aryl group, an aralkyl group, fluorine-substituted alkyl group or the general formula ₍₅₎ -C _{q H 2q,} —O— (C ₂ H ₄ O) _i (C ₃ H ₆ O) _j R ⁹ is the same or different organic group selected from the organic groups represented by R ⁹ , and R ⁷ and R ^{8 each} have 1 to a 30 hydrocarbon group, ^{R 9} is a hydrocarbon group or ^R 10 4 to 30 carbon atoms - (CO) - organic group represented ^{by, R 10} is a hydrocarbon group having 1 to 30 carbon atoms.
a, b, and c are 1.0 ≦ a ≦ 2.5, 0.001 ≦ b ≦ 1.5, and 0.001 ≦ c ≦ 1.5, respectively, and d, e, i, and j are each 0 ≦ d ≦ 50, 0 ≦ e ≦ 50, 0 ≦ i ≦ 50, 0 ≦ j ≦ 50, f and g are 2 ≦ f ≦ 200, 0 ≦ g ≦ 200, and f + g is 3 to 200, respectively. It is an integer.
M, n, and q are integers of 0 ≦ m ≦ 15, 0 ≦ n ≦ 15, and 0 ≦ q ≦ 15, h is an integer of 0 ≦ h ≦ 500, and p is an integer of 1 ≦ p ≦ 5. It is. ]
(B) The water phase component is 65.0-80.0% by mass, (C) 50.0% by mass or more of the oil phase component is silicone oil, (D) contains sodium citrate, and has a viscosity at 30 ° C. It is achieved by a water-in-oil emulsified cosmetic that is 20,000 mPa · s or more.

  The water-in-oil emulsified cosmetic of the present invention has a fresh and light touch and is particularly excellent in storage stability, but also has the advantages of long lasting makeup, uniform finish, and safety.

  The branched polyether-modified silicone (A) used in the present invention is a known substance, and among them, those having the following structures are particularly preferable.

[Wherein, r is an integer of 1 to 20, and x, y and z each independently represents an integer of 1 to 500. ]
As a branched-type polyether modified silicone of (A), KF-6028 (made by Shin-Etsu Chemical Co., Ltd.) is mentioned as a commercial item, for example, The display name is PEG-9 polydimethylsiloxyethyl dimethicone. A compounding quantity is 0.3-4.0 mass%, and 0.5-3.0 mass% is especially preferable.

  In the present invention, in addition to the branched polyether-modified silicone, a nonionic surfactant can be used alone or in combination of two or more as an emulsifier / dispersant if necessary. Particularly preferred are fatty acid polyhydric alcohol esters and polyether-modified silicones.

  The (B) aqueous phase component used in the present invention is 65.0 to 80.0% by mass. When the water phase component is less than 65%, a fresh feeling cannot be obtained, and when the water phase component is more than 80.0% by mass, the result is not satisfactory in terms of storage stability.

  In the present invention, ethanol can be blended if necessary. This compounding quantity is 1.0-30.0 mass%, Most preferably, it is 5.0-15.0 mass%. This amount of ethanol is contained in the (B) aqueous phase component.

  In the oil phase component (C) used in the present invention, it is essential that 50.0% by mass or more of the oil phase component is silicone oil for light feel and excellent storage stability.

  The sodium citrate (D) used in the present invention can improve the storage stability, particularly among various electrolytes, in the intended water-in-oil emulsion cosmetic.

  The water-in-oil emulsified cosmetic of the present invention must have a viscosity at 30 ° C. of 20,000 mPa · s or more. And preferably, 100,000 mPa * s or less is preferable. If the viscosity is less than 20,000 mPa · s, the required storage stability cannot be obtained.

  In addition to the above essential components, the water-in-oil emulsified cosmetic of the present invention contains an oil component, a moisturizer, an emulsifier, a fragrance, an ultraviolet absorber, an antiseptic, a plant extract, a pigment and the like as necessary. be able to.

EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is further explained in full detail, this invention is not limited by this.
Example 1 (skin care cream)
(mass%)
1. Branched polyether-modified silicone * 1 0.5
2.5-mer cyclic silicone 20.0
3. Vaseline 1.0
4). Liquid paraffin 5.0
5). Dipropylene glycol 2.0
6). Sorbitol 3.0
7). Methyl paraoxybenzoate 0.2
8). Phenoxyethanol 0.2
9. Sodium citrate 0.5
10. Carrot extract 0.1
11. Hypericum extract 0.1
12 Purified water 67.4
* 1; KF-6028 (manufactured by Shin-Etsu Chemical Co., Ltd.)
Production method Oil phase components 1 to 4 were dissolved by heating, and water phase components 5 to 12 were dissolved by heating, and then dispersed and cooled to room temperature.
Comparative Example 1
A skin care cream was prepared in the same manner as in Example 1 except that KF-6017 (manufactured by Shin-Etsu Chemical Co., Ltd.), which is a linear polyether-modified silicone, was used instead of the branched polyether-modified silicone in Example 1. Prepared.
Example 2 (make-up base)
(mass%)
1. Branched polyether-modified silicone * 2 1.5
2.5-mer cyclic silicone 14.0
3. Dimethyl silicone 4.0
4). Dipropylene glycol 5.0
5). Maltitol 2.0
6). Sodium citrate 0.3
7). Apple extract 0.1
8). Purified water 62.1
9. Methylsiloxane network polymer * 3 1.0
10. Ethanol 10.0
* 2; KF-6028 (manufactured by Shin-Etsu Chemical Co., Ltd.)
* 3; Tospearl 145 (GE Toshiba Silicone)
Production method Oil phase components 1 to 3 were heated and dissolved, and component 9 was mixed therewith. A solution obtained by heating and dissolving aqueous phase components 4 to 8 was added to the mixture and dispersed, cooled to room temperature, and component 10 was added and dispersed.
Comparative Example 2
A makeup base was prepared in the same manner as in Example 2 except that 10.0% by mass of the pentameric cyclic silicone of Example 2 was replaced with purified water.
Comparative Example 3
A makeup base was prepared in the same manner as in Example 2 except that 30.0% by mass of the purified water of Example 2 was replaced with pentamer cyclic silicone.
Example 3 (Foundation)
(mass%)
1. Branched polyether-modified silicone * 4 2.0
2. Dimethyl silicone 5.0
3.4-mer branched silicone * 5 14.0
4). Octyl paramethoxycinnamate 2.0
5). Dipropylene glycol 2.0
6). Glycerin 1.0
7). Sodium citrate 0.5
8). Olive leaf extract 0.1
9. Purified water 53.4
10. Silicone-treated titanium oxide 7.0
11. Silicone treatment Bengala 0.4
12 Silicone-treated yellow iron oxide 1.5
13. Silicone-treated black iron oxide 0.2
14 Silicone-treated talc 0.9
15. Ethanol 10.0
* 4; KF-6028 (manufactured by Shin-Etsu Chemical Co., Ltd.)
* 5: TMF-1.5 (Shin-Etsu Chemical Co., Ltd.)
Production method Components 10 to 14 were mixed and pulverized, and oil phase components 1 to 4 were added to and dispersed in the heated solution. Water phase components 5 to 9 were added to the solution after warming, dispersed, cooled to room temperature, and component 15 was added and dispersed.
Comparative Example 4
A foundation was prepared in the same manner as in Example 3 except that sodium citrate in Example 3 was not added.

The test methods used in the present invention (1) use characteristic evaluation test and (2) storage stability test are as follows.
(1) Use characteristics evaluation test Twenty female panel members applied each sample of Examples and Comparative Examples, and the use characteristics were evaluated according to the number of respondents who replied "It is fresh and light."
(2) Storage stability test A sample was stored in a thermostatic bath at 0 ° C, 25 ° C and 45 ° C for 3 months, and it was examined whether or not separation of the water phase component and the oil phase component occurred.
No separation when stored at any temperature: ◎
Not separated when stored at 25 ° C or lower, separated when stored at 45 ° C: ○
Separate even when stored at 25 ° C or lower: ×
The result of having performed the said test to each sample of Examples 1-3 and Comparative Examples 1-4 is shown below.

Examples Comparative examples
1 2 3 1 2 3 4
―――――――――――――――――――――――――――――――――――
Service characteristics evaluation test 17 19 18 3 18 8 12
Storage stability test ◎ ◎ ◎ × × ◎ ○
The samples of Examples 1 to 3 of the present invention were superior to the samples of Comparative Examples 1 to 4 in the comprehensive evaluation of usage characteristics and storage stability.

  The water-in-oil emulsified cosmetic of the present invention has a fresh and light touch and is particularly excellent in storage stability, but also has the advantages of long-lasting makeup, uniform finish, and safety. Therefore, it can be applied in the field of pharmaceuticals, quasi-drugs and cosmetics used for skin conditioning and beauty, and is extremely useful in industry.

Claims (1)

(A) 0.3 to 4.0% by mass of a branched polyether-modified silicone represented by the following general formula (1),

[Wherein, R ¹ represents an alkyl group having 1 to 30 carbon atoms, an aryl group, an aralkyl group, a fluorine-substituted alkyl group, or a general formula (2) -C _m H _2m —O— (C ₂ H ₄ O) _d ( C ₃ H ₆ O) _e R ⁴ is the same or different organic group selected from organic groups represented by R ⁴ , and R ² is represented by the general formula (3) —C _n H _2n —O— (C ₂ H ₄ O _{) f (C 3 H 6 O} ) a polyoxyalkylene group represented by g -R ^{5, R 3} is represented by the following general formula (4)

Wherein R ⁴ is a hydrocarbon group having 4 to 30 carbon atoms or an organic group represented by R ⁷ — (CO) —, and R ⁵ is a hydrogen atom or a carbon atom having 1 to 30 carbon atoms. hydrogen radical or ^R 8 - (CO) - organic group represented by, ^{R 6} is an alkyl group having 1 to 30 carbon atoms, an aryl group, an aralkyl group, fluorine-substituted alkyl group or the general formula ₍₅₎ -C _{q H 2q,} —O— (C ₂ H ₄ O) _i (C ₃ H ₆ O) _j R ⁹ is the same or different organic group selected from the organic groups represented by R ⁹ , and R ⁷ and R ^{8 each} have 1 to a 30 hydrocarbon group, ^{R 9} is a hydrocarbon group or ^R 10 4 to 30 carbon atoms - (CO) - organic group represented ^{by, R 10} is a hydrocarbon group having 1 to 30 carbon atoms.
a, b and c are 1.0 ≦ a ≦ 2.5, 0.001 ≦ b ≦ 1.5 and 0.001 ≦ c ≦ 1.5, respectively, and d, e, i and j are 0 ≦ d ≦ 50, 0 ≦ e ≦ 50, 0 ≦ i ≦ 50, 0 ≦ j ≦ 50, f and g are 2 ≦ f ≦ 200, 0 ≦ g ≦ 200, and f + g is 3 to 200, respectively. It is an integer.
M, n, and q are integers of 0 ≦ m ≦ 15, 0 ≦ n ≦ 15, and 0 ≦ q ≦ 15, h is an integer of 0 ≦ h ≦ 500, and p is an integer of 1 ≦ p ≦ 5. It is. ]
(B) 65.0-80.0 mass% of water phase components,
(C) an oil phase component in which 50.0% by mass or more is silicone oil,
(D) A water-in-oil emulsified cosmetic containing sodium citrate and having a viscosity at 30 ° C. of 20,000 mPa · s or more.