JP2009143834A - Water-in-oil type emulsion cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-in-oil type emulsion cosmetic which is free of stickiness, excels in moisturizing properties with a moist feel, has good spreadability, and excels in storage stability. <P>SOLUTION: The water-in-oil type emulsion cosmetic comprises 3-7 mass% silicone compound having a specific structure, 10-20 mass% at least one kind selected from cyclic silicone tetra to hexamers, 4-8 mass% methylphenylpolysiloxane, 5-10 mass% hydrocarbon oil, 0.5-2 mass% organically modified clay mineral, and 5-20 mass% titanium oxide. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a water-in-oil emulsified cosmetic. More particularly, the present invention relates to a water-in-oil emulsified cosmetic that has no stickiness, is excellent in moisturizing and moisturizing properties, has a good spread, and has excellent storage stability.

  Conventionally, water-in-oil emulsified cosmetics have a structural characteristic that the oil phase is a continuous phase, leaving an oil film with low moisture permeability on the skin surface, protecting the skin from drying over a long period of time, and maintaining makeup durability. Is known to be good. However, water-in-oil emulsified cosmetics have restrictions on the amount of the inner aqueous phase in terms of storage stability, and a large amount of wax is added to the oil system that becomes the outer oil phase, It was necessary to increase the stability of the system by using a large amount of surfactant. As a result, when applied to the skin, when it is compared with an oil-in-water emulsified cosmetic having an aqueous phase as a continuous phase, such as when it is applied to the skin, it becomes sticky or oily, or the spread of spread is worsened. It was difficult to get. Many studies have been made so far to solve this problem.

  For example, water-in-oil emulsified cosmetics containing a specific nonionic surfactant and a specific mixed oil (see Patent Document 1), water-in-oil containing an organopolysiloxane elastomer spherical powder and a polyether silicone active agent Emulsified cosmetic (see Patent Document 2), water-in-oil emulsified cosmetic containing high molecular weight polydimethylsiloxane (see Patent Document 3), oil containing polyoxyalkylene-modified organopolysiloxane and water-swellable clay mineral A water-in-water emulsified cosmetic (see Patent Document 4) and the like are disclosed.

JP 2000-204276 A JP-A-9-95433 JP-A-10-139625 Japanese Patent Laid-Open No. 1-180237

  Various water-in-oil emulsified cosmetics have been studied so far, but they are not always sufficient in terms of usability and storage stability. Accordingly, an object of the present invention is to provide a water-in-oil emulsified cosmetic that has no stickiness, is excellent in moisturizing and moisturizing properties, has good elongation spread, and has excellent storage stability.

  As a result of intensive studies, the present inventors have confirmed that the following water-in-oil type emulsified cosmetics achieve the above object, and have completed the present invention.

That is, the present invention
The following components (A) to (F):
(A) 3 to 7% by mass of a specific silicone compound represented by the following general formula (1)
R ¹ _a R ² _b R ³ _c SiO _{(4-a-b-c) / 2} (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 —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 —C _m H _2m —O— (C ₂ H ₄ O) _f (C ₃ H ₆ O). _The polyoxyalkylene group represented by _g- R ⁵ , R ³ represents the following general formula (2)

R ⁴ is a hydrocarbon group having 4 to 30 carbon atoms or an organic group represented by R ^6- (CO)-, R ⁵ is a hydrogen atom or a hydrocarbon having 1 to 30 carbon atoms A group or an organic group represented by R ⁶ — (CO) —, R ⁶ 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, d and e are 0 ≦ d ≦ 50, An integer of 0 ≦ e ≦ 50, f and g are integers of 2 ≦ f ≦ 200, 0 ≦ g ≦ 200, and f + g is 3 to 200, respectively. M is an integer of 0 ≦ m ≦ 15, h is an integer of 0 ≦ h ≦ 500, and n is an integer of 1 ≦ n ≦ 5. ]
(B) One or more types selected from cyclic silicone tetramer to hexamer 10 to 20% by mass
(C) Methylphenylpolysiloxane 4-8% by mass
(D) 5-10% by mass of hydrocarbon oil
(E) Organically modified clay mineral 0.5-2% by mass
(F) Titanium oxide 5-20% by mass
The present invention relates to a water-in-oil type emulsified cosmetic comprising:

  According to the present invention, it is possible to provide a water-in-oil emulsified cosmetic that has no stickiness, is excellent in moisturizing moisture, has good elongation spread, and has excellent storage stability.

  The mass average molecular weight of the specific silicone compound (A) used in the present invention is not particularly limited, but is preferably 500 to 200,000, and particularly preferably 1000 to 100,000. As a commercial item, Shin-Etsu Chemical Co., Ltd. KF-6028 etc. are mentioned.

  As for the compounding quantity of a component (A), 3-7 mass% is preferable. If it is less than 3% by mass, the storage stability is lowered, and if it exceeds 7% by mass, an excellent feeling of use cannot be obtained.

  The cyclic silicone tetramer to hexamer (B) is represented by octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and one or a combination of two or more selected from these is used. . Examples of commercially available products include Silicon KF-995 manufactured by Shin-Etsu Chemical Co., Ltd.

  As for the compounding quantity of the component (B) used for this invention, 10-20 mass% is preferable. If it is less than 10% by mass, an excellent feeling of use cannot be obtained, and if it exceeds 20% by mass, the oily feeling increases and the feeling of use becomes worse.

  Methylphenylpolysiloxane (C) is usually used in cosmetics. Examples of commercially available products include Silicon KF-56 manufactured by Shin-Etsu Chemical Co., Ltd.

  As for the compounding quantity of a component (C), 4-8 mass% is preferable. If it is less than 4% by mass, an excellent feeling of use cannot be obtained, and a decrease in storage stability is also observed. Moreover, when it exceeds 8 mass%, the outstanding usability | use_condition cannot be obtained.

  The hydrocarbon oil (D) used in the present invention is usually used in cosmetics, and examples thereof include liquid paraffin and squalane.

  As for the compounding quantity of a component (D), 5-10 mass% is preferable. If it is less than 5% by mass, an excellent feeling of use cannot be obtained, and if it exceeds 10% by mass, the oily feeling increases and the feeling of use becomes worse.

  The organically modified clay mineral (E) used in the present invention is usually used in cosmetics, and dimethyl distearyl ammonium hectorite, dimethyl distearyl ammonium bentonite, benzyl dimethyl stearyl ammonium hectorite and the like are known. Examples of commercially available products include Benton 38VCG (dimethyl distearyl ammonium hectorite) manufactured by Elementis Japan.

  The blending amount of the component (E) is preferably 0.5 to 2% by mass. When the amount is less than 0.5% by mass, the storage stability is deteriorated, and when it exceeds 2% by mass, an excellent feeling of use cannot be obtained.

  The titanium oxide (F) used in the present invention is usually used in cosmetics, and if necessary, those treated with alumina, silica, or those treated with a silicone or the like are used.

  As for the compounding quantity of a component (F), 5-20 mass% is preferable. If it is less than 5% by mass, the concealing effect is low, the purpose as a makeup cosmetic or sunscreen cosmetic cannot be achieved, and if it exceeds 20% by mass, the feel becomes heavy.

  The water-in-oil emulsified cosmetic of the present invention contains, in addition to the above essential components, components used in ordinary cosmetics, such as pigments, oily components, moisturizers, emulsifiers, ultraviolet absorbers, preservatives, and fragrances. It can mix | blend in the range which does not impair the effect of this invention.

  The use of the water-in-oil emulsified cosmetic of the present invention is not particularly limited, and can be applied as a makeup cosmetic such as an emulsified foundation and a makeup base, and a sunscreen cosmetic such as a sunscreen.

  The dosage form can be applied to emulsions, creams and the like.

  Hereinafter, the present invention will be described in more detail with reference to examples. Note that these do not limit the present invention.

  Tables 1, 2 and 3 show the water-in-oil emulsified cosmetics of Examples 1 to 6 and Comparative Examples 1 to 16, respectively. A water-in-oil emulsified cosmetic was produced by the following method, and storage stability and usability evaluation were performed according to the following method.

Note 1: KF-6028 (manufactured by Shin-Etsu Chemical Co., Ltd.)
<Manufacturing method>
The oil phase components (1) to (7) are mixed, dissolved by heating at 75 ° C., the pigments (8) to (10) are added thereto, and the mixture is uniformly dispersed with a homomixer. On the other hand, the water phase components (11) to (14) are mixed, heated and dissolved at 75 ° C., and then added to the oil phase component to emulsify. After the emulsification, the mixture was cooled to 30 ° C. to obtain a water-in-oil emulsified cosmetic.

<Evaluation of storage stability>
The obtained sample was left still in each thermostat of 5 degreeC, 25 degreeC, and 50 degreeC, and the storage stability after 30 days was determined in accordance with the following reference | standard.
[Judgment]
○: No change △: Slight separation tendency ×: Clearly separated <Evaluation of feeling of use>
Ten professional evaluation panels evaluated the sticky feeling, moisturizing feeling, and stretch feeling in five levels, and determined from the average points according to the following criteria.
[Evaluation points]
5 points: very good 4 points: good 3 points: normal 2 points: slightly bad 1 point: bad [determination]
◯: Average score of 4.0 or more Δ: Average score of 2.0 or more and less than 4.0 ×: Average score of less than 2.0 .

  As is clear from the results of Tables 1, 2 and 3, Examples 1 to 6 according to the present invention were superior in both storage stability and usability compared to Comparative Examples 1 to 16.

[Example 7] Water-in-oil emulsified cosmetic (emulsion foundation 1)
(1) Silicone compound (Note 1) 5.0 (mass%)
(2) Octamethylcyclotetrasiloxane 15.0
(3) Methylphenylpolysiloxane 6.0
(4) Squalane 7.0
(5) Organically modified clay mineral (Note 2) 1.0
(6) Titanium oxide 10.0
(7) Bengala 0.5
(8) Yellow iron oxide 1.5
(9) Black iron oxide 0.2
(10) Talc 5.0
(11) 1,3-butylene glycol 5.0
(12) Methyl paraoxybenzoate 0.2
(13) Sodium chloride 1.0
(14) The balance of purified water 100 Note 1: KF-6028 (manufactured by Shin-Etsu Chemical Co., Ltd.)
Note 2: Benton 38VCG (made by Elementis Japan)
Production method: The oil phase components (1) to (5) are mixed, dissolved by heating at 75 ° C., the pigments (6) to (10) are added thereto, and the mixture is uniformly dispersed with a homomixer. On the other hand, the water phase components (11) to (14) are mixed, heated and dissolved at 75 ° C., and then added to the oil phase component to emulsify. After the emulsification, the mixture was cooled to 30 ° C. to obtain a water-in-oil emulsified cosmetic.

  Example 7 was a water-in-oil emulsified cosmetic with no stickiness, excellent moisturizing and moisturizing properties, good elongation spread, and excellent storage stability.

[Example 8] Water-in-oil emulsified cosmetic (emulsification foundation 2)
(1) Silicone compound (Note 1) 5.0 (mass%)
(2) Dodecamethylcyclohexasiloxane 15.0
(3) Methylphenylpolysiloxane 6.0
(4) Squalane 7.0
(5) Organically modified clay mineral (Note 2) 1.0
(6) Titanium oxide 10.0
(7) Bengala 0.5
(8) Yellow iron oxide 1.5
(9) Black iron oxide 0.2
(10) Talc 5.0
(11) 1,3-butylene glycol 5.0
(12) Methyl paraoxybenzoate 0.2
(13) Sodium chloride 1.0
(14) The balance of purified water 100 Note 1: KF-6028 (manufactured by Shin-Etsu Chemical Co., Ltd.)
Note 2: Benton 38VCG (made by Elementis Japan)
Production method: The oil phase components (1) to (5) are mixed, dissolved by heating at 75 ° C., the pigments (6) to (10) are added thereto, and the mixture is uniformly dispersed with a homomixer. On the other hand, the water phase components (11) to (14) are mixed, heated and dissolved at 75 ° C., and then added to the oil phase component to emulsify. After the emulsification, the mixture was cooled to 30 ° C. to obtain a water-in-oil emulsified cosmetic.

  Example 8 was a water-in-oil emulsified cosmetic with no stickiness, excellent moisturizing and moisturizing properties, good elongation spread, and excellent storage stability.

Claims (1)

The following components (A) to (F):
(A) 3-7% by mass of a specific silicone compound represented by the following general formula (1)
R ¹ _a R ² _b R ³ _c SiO _{(4-a-b-c) / 2} (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 —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 —C _m H _2m —O— (C ₂ H ₄ O) _f (C ₃ H ₆ O). _The polyoxyalkylene group represented by _g- R ⁵ , R ³ represents the following general formula (2)

R ⁴ is a hydrocarbon group having 4 to 30 carbon atoms or an organic group represented by R _6- (CO)-, R ⁵ is a hydrogen atom or a hydrocarbon having 1 to 30 carbon atoms A group or an organic group represented by R ⁶ — (CO) —, R ⁶ 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, d and e are 0 ≦ d ≦ 50, An integer of 0 ≦ e ≦ 50, f and g are integers of 2 ≦ f ≦ 200, 0 ≦ g ≦ 200, and f + g is 3 to 200, respectively. M is an integer of 0 ≦ m ≦ 15, h is an integer of 0 ≦ h ≦ 500, and n is an integer of 1 ≦ n ≦ 5. ]
(B) One or more types selected from cyclic silicone tetramer to hexamer 10 to 20% by mass
(C) Methylphenylpolysiloxane 4-8% by mass
(D) 5-10% by mass of hydrocarbon oil
(E) Organically modified clay mineral 0.5-2% by mass
(F) Titanium oxide 5-20% by mass
A water-in-oil type emulsified cosmetic comprising: