JPH11180831A - Powder compounded cosmetics - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide cosmetics excellent in dispersibility of powder and having a favorable usability. SOLUTION: This cosmetics is compounded with the following (A) and (B) as the essential components: (A) an alkyl modified dimethylpolysiloxane expressed by the general formula I or II [in the formula, R<1> -R<4> are each the same or different, Cn H2n+1 O- or Cn H2n+1 O- ((n) is an integer of 1-26), (p) and (q) an (r) are each an integer of 1-1,500, q+r is 2-2,000, with the proviso that CH3 - is excluded when R<1> =R<2> and R3 =R<4> .]; and (B) an inorganic powder. The weight ratio of the component (A)/component (B) is at least 0.5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic which is characterized by blending a specific alkyl-modified dimethylpolysiloxane with a powder, has excellent powder dispersibility, and has good usability.

[0002]

2. Description of the Related Art At present, cosmetics containing powder are:
It is classified into a wet dispersion and a dry dispersion according to the dispersion method. Wet dispersions further include those in which powder is dispersed in an oily base (eg, an oily foundation, lipstick, etc.) and those in which the powder is dispersed in an aqueous base (eg, calamine lotion, peel-off pack, etc.), Oil-in-water type (O / W type)
Powders dispersed in an aqueous emulsifying base (for example, O /
W-type liquid foundation, etc.), O / W type emulsifying base in which powder is dispersed in an oil system (for example, O / W type sunscreen cosmetics, mascara, eyeliner, etc.), water-in-oil type ( (W / O-type) emulsified base in which powder is dispersed in an aqueous system (for example, W / O-type sunscreen cosmetics, etc.), and W / O-type emulsified base in which powder is dispersed in an oil-based (For example, W / O type liquid foundation, W / O type sunscreen cosmetics, etc.).

[0003] Dry dispersions include those in which powder is dispersed in the gas phase (the dispersion medium is air). Specific examples include powder foundation, powder eyeshadow, white powder, antiperspirant powder and the like. No.

[0004] In the case of a wet dispersion, in consideration of its usability, it is preferable to disperse the powder in an oil system, regardless of the emulsified or non-emulsified one, because the powder does not have a feeling of creaking due to the powder. In this case, a low HLB surfactant or a high molecular compound is used as a dispersant for the oil-based dispersion. However, if a large amount of the surfactant is used, safety problems such as skin irritation and stickiness may be caused. There is a concern about usability issues. Conversely, if the blending amount is small, the dispersibility of the powder is not good, and it may be necessary to blend an excessive amount of powder in order to obtain the desired effect.

[0005] For example, in the case of a foundation, if the dispersibility of the powder is poor, the difference between the appearance color and the application color becomes large, or the powder that is agglomerated during application is further dispersed on the skin. , The coating color may change rapidly,
There is a problem that powder is used more than necessary in order to obtain a predetermined coloring, thereby impairing usability.

[0006] In recent years, sunscreen cosmetics have recently had a high SPF value (SUN PRO) having a more sunscreen effect.
TECTION FACTOR; index of sunscreen effect)
Things are desired. In order to increase the SPF value, a method of adding a large amount of an organic ultraviolet absorber or a large amount of an ultraviolet scattering agent such as a fine particle powder of a metal oxide may be used. In recent years, it has been avoided to mix organic UV absorbers in large amounts due to their skin irritation and unique raw material odor, and there is a tendency for a large amount of UV scattering agents, such as fine particles of metal oxides, to be compounded. . However, when these metal oxides are compounded in a large amount, the compounding amount of the powder dispersant also increases, which causes safety and usability problems.
In addition, when the compounding amount of the powder dispersant is small, the dispersibility of the powder is reduced, and the ultraviolet protection ability is reduced,
There are problems such as that the color of the cosmetic applied to the skin becomes white.

[0007]

Accordingly, it has been desired to develop a cosmetic containing a powder, which has excellent dispersibility of the powder and good usability.

[0008]

Means for Solving the Problems In view of such circumstances, the present inventors have conducted intensive studies and as a result, have found that in cosmetics in which powder is blended, a specific amount of an alkyl-modified dimethylpolysiloxane is specified relative to inorganic powder. It has been found that by using such a composition, it is possible to obtain a cosmetic having improved powder dispersibility and improved usability such as stickiness and the like, and completed the present invention. That is, the present invention provides the following components (A) and (B): (A) an alkyl-modified dimethylpolysiloxane represented by the following general formula (1) or (2)

[0009]

Embedded image

[0010]

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[Wherein, R ^{1 to} R ⁴ may be the same or different, and C _n H _{2n + 1} O- or C _n H _{2n + 1-} (n is _{1 to} 26
Where p, q, and r are each an integer of 1 to 1500, and q + r is a range of 2 to 2000. However, when R ¹ = R ² and R ³ = R ⁴ , CH ₃ −
Except for [B] Inorganic powder is blended as an essential component, and the weight ratio (A) / (B) of the component (A) to the component (B) is 0.5 or more. Provide cosmetics.

[0012]

Alkyl-modified dimethylpolysiloxane (A) component used in the Detailed Description of the Invention The present invention is those represented by the general formula (1) or (2), among them, R ¹ to R ⁴ is _{C 16 H 33 O-, C 18} H 37 O-, C 20 H 41
_{O-, C 22 H 45 O-,} CH 3 -, C 16 H 33 -, C 18 H 37
−, C ₂₀ H ₄₁ −, C ₂₂ H ₄₅ − (where R ¹ = R ² , R ³ =
In the case of R ⁴ , it is more preferable to use any of those which are CH ₃ —). Commercially available products thereof include, for example, Avil wax 2434, Avil wax 2440, Avil wax 9800, Avil wax 9801, Avil wax 9840 (all manufactured by Goldschmidt). These alkyl-modified dimethylpolysiloxanes can be used alone or in combination of two or more.

As the inorganic powder of the component (B) used in the present invention, those commonly used in cosmetics can be used. For example, titanium oxide, zinc oxide, cerium oxide, barium oxide, talc, mica, Iron oxide and the like can be mentioned, but metal oxides are preferable, and titanium oxide, zinc oxide, cerium oxide and iron oxide are more preferable. These powders can be used alone or in combination of two or more, and may be used as they are or may be subjected to a surface treatment such as a hydrophobic treatment or a hydrophilic treatment.

The weight ratio (A) / (B) of the alkyl-modified dimethylpolysiloxane (A) and the inorganic powder (B) used in the present invention is 0.5 or more, preferably (A). ) / (B) is 0.5 to 2.5. (A) /
When (B) is less than 0.5, a sufficient powder dispersion effect cannot be obtained.

In the powder-containing cosmetic composition of the present invention, in addition to the above-mentioned essential components, if necessary, components generally used in cosmetics can be added as long as the effects of the present invention are not impaired. Examples of such components include oils and raw materials such as oils and fats, waxes, hydrocarbons, fatty acids, alcohols, ester oils, ether oils, silicone oils, fluorine compounds, powder raw materials other than the inorganic powder of component (B), Metal soap, surfactant,
Examples include silicone-based surfactants, polyhydric alcohols, polymer compounds, preservatives, antioxidants, ultraviolet absorbers, cosmetic ingredients, pigments, fragrances, and the like.

The powder-containing cosmetic composition of the present invention includes an emulsion,
Essences, creams, lotions, packs, sunscreen cosmetics, liquid foundations, stick foundations, concealers, solid foundations, lipsticks, eyeliners, mascaras, eye shadows, and the like.

[0017]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the present invention.

Examples 1 to 4 and Comparative Examples 1 to 3 Oil-based sunscreen cosmetics Oil-based sunscreen cosmetics were prepared according to the composition shown in Table 1 and by the following production method. Goodness, no stickiness, natural finish) and dispersibility were evaluated. The results are also shown in Table 1.

[0019]

[Table 1]

(Production method) A. Components (5) to (9) are heated and uniformly mixed with a roller. B. A is added to the components (1) to (4) and (10), mixed uniformly, and defoamed to obtain an oily sunscreen cosmetic.

(Evaluation method) (a) Usability test Using oily sunscreen cosmetics of Examples 1 to 4 and Comparative Examples 1 to 3, a use test was conducted by 30 female panels to obtain good spreadability and stickiness. Noness, naturalness of the finish (does not turn pale) is evaluated according to the following evaluation criteria (a),
Based on the average score, the following criterion (a) was used. <Evaluation criteria (a)> (Evaluation) (Evaluation points) Very good: 5 points Good: 4 points Normal: 3 points Bad: 2 points Very bad: 1 point <Judgment criteria (a)> (Evaluation points) ( Judgment) 4.0 points or more: ◎ 3.0 points or more and less than 4.0 points: ○ 2.0 points or more and less than 3.0 points: △ less than 2.0 points: ×

(B) Dispersibility test In general, it is known that, when the dispersibility of the fine particle powder is improved, the transparency increases and the hiding power decreases. Therefore, in the present invention, the dispersibility was evaluated based on “low hiding power”. Using the oil-based sunscreen cosmetics of Examples 1 to 4 and Comparative Examples 1 to 3 as samples, each sample was tested for hiding power test paper (JIS
K5101) was spread using a 4 mil doctor blade, and the hiding power was visually evaluated according to the following criterion (b). <Judgment Criteria (b)> (Evaluation) (Judgment) Little hiding power: ◎ Some hiding power: ○ Some hiding power: △ Very hiding power: ×

As is clear from the results shown in Table 1, Examples 1 to 4 according to the present invention satisfied all the evaluation items having good usability and excellent powder dispersibility.
On the other hand, in Comparative Examples 1 to 3, none satisfying all the evaluation items was obtained.

Example 5 W / O type sunscreen cosmetic (component) (% by weight) Fine particle titanium oxide 20.0 2. 2. Decamethylpentacyclopolysiloxane 10.0 3. dibehenoxydimethylpolysiloxane 15.0 4. Dimethylpolysiloxane / cetylmethyl 3.0 Polysiloxane / poly (oxyethylene / oxypropylene) methylpolysiloxane copolymer 5. Propylene glycol dicaprate 10.0 6. Remaining purified water Sodium chloride 0.5 8.1 1,3-butylene glycol 10.0 9. 9. Methyl paraoxybenzoate 0.2 Appropriate amount of fragrance

(Production method) A. Heat components (1) and (3) and mix uniformly with a roller. B. Add A to components (2), (4), (5) and (10) and mix uniformly. C. The components (6) to (9) are uniformly mixed. D. C is added to B, emulsified, cooled, and defoamed to W / O
Obtain type sunscreen cosmetics. In Example 5, W was excellent in powder dispersibility and excellent in usability.
/ O type sunscreen cosmetics.

Example 6 O / W-type base emulsion (component) (% by weight) Stearic acid 1.0 2. Cetyl alcohol 1.5 3. Liquid paraffin 5.0 4. Dicetyl dimethyl polysiloxane 1.55. 5. Pigment grade titanium oxide 3.0 Propylene glycol 15.0 7. Purified water balance 8. Carboxyvinyl polymer 0.19. 9. Methyl paraoxybenzoate 0.2 Triethanolamine 1.0 11. Appropriate amount of fragrance

(Production method) A. The components (4) and (5) are uniformly mixed with a roller. B. Heat components (1)-(3) and (11) to 70 ° C., add A and mix uniformly. C. Heat components (6)-(10) to 70 ° C. and mix uniformly. D. Add B to C, emulsify, cool, defoam and O / W
A mold base emulsion is obtained. Example 6 is excellent in powder dispersibility,
It was an O / W type base emulsion having good usability.

Example 7 W / O Type Liquid Foundation (Component) (% by Weight) 1. Decamethylpentacyclopolysiloxane 15.0 2. Cetyl isooctanoate 5.0 3. Polyoxyethylene-modified dimethyl poly 2.0 siloxane Distearoxydimethylpolysiloxane 10.0 5. Titanium oxide 4.0 6. Talc 5.0 7. Bengara 0.58. Yellow iron oxide 0.89. Black iron oxide 0.1 10. Purified water Remaining amount 11.1,3-butylene glycol 15.0 12. 12. Methyl paraoxybenzoate 0.2 Appropriate amount of fragrance

(Production method) The components (4) to (9) are heated and uniformly mixed with a roller. B. Add A to components (1) to (3) and (13) and mix uniformly. C. The components (10) to (12) are uniformly mixed. D. C is added to B, emulsified, cooled, and defoamed to W / O
Obtain a mold liquid foundation. Example 7 was a W / O type liquid foundation having excellent powder dispersibility and good usability.

[0030]

As described in detail above, the cosmetic of the present invention is excellent in powder dispersibility, has good usability, and is useful as a powder-containing cosmetic.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI A61K 7/42 A61K 7/42

Claims (4)

[Claims] 1. The following components (A) and (B): (A) an alkyl-modified dimethylpolysiloxane represented by the following general formula (1) or (2): Embedded image Wherein, R ¹ to R ⁴ may be the same or different, C _n
H _{2n +} 1 O- or _{C n H 2n + 1 - (} n is an integer of 1 to 26) are those represented by, p, q, r each 1-1
An integer of 500, q + r ranges from 2 to 2000. However, when R ¹ = R ² and R ³ = R ⁴ , those of CH _3- are excluded. [B] Inorganic powder is blended as an essential component, and the weight ratio (A) / (B) of the component (A) to the component (B) is 0.5 or more. Cosmetics. 2. The composition according to claim 1, wherein R ¹ to
R ⁴ is _{C 16 H 33 O-, C 18} H 37 O-, C 20 H 41 O-, C
₂₂ H ₄₅ O-, CH _3- , C ₁₆ H _33- , C ₁₈ H _37- , C _{20
H 41 -, C 22 H 45} - ( where, R ¹ = For ^{R 2, R 3 = R 4} , CH 3 - excluding those) according to claim 1 is either
The powder-containing cosmetic according to the above. 3. The powder-blended cosmetic according to claim 1, wherein the inorganic powder of the component (B) is a metal oxide. 4. The metal oxide of the inorganic powder of the component (B),
The powdered cosmetic according to claim 3, wherein the cosmetic is selected from one or more of titanium oxide, zinc oxide, cerium oxide, and iron oxide.