Surface-treatment agent for powder for use in cosmetic and cosmetic containing powder treated with the same

Patent metadata

Field	Value
Publication number	US-9260607-B2
Application number	US-201013516667-A
Country	US
Kind code	B2
Filing date	Dec 22, 2010
Priority date	Dec 24, 2009
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

The present invention relates to a surface-treatment agent for powders for use in cosmetics, including a specific polymer having a specified carbosiloxane dendrimer structure, as well as a cosmetic comprising a powder which has been treated with the above surface-treatment agent. The surface-treated powder does not generate hydrogen, and therefore is safe. Further the surface-treated powder can exhibits, good compatibility with other cosmetic raw materials, and thereby, the stability of the formulation in cosmetics can be improved. The surface-treated powder can provide cosmetics with good water resistance, good sebum resistance, good glossiness, a good tactile sensation, good adhesive properties to hair and/or skin, or the like. The cosmetic can also have superior surface protective properties, a superior outer appearance, and/or a superior sensation during use.

First claim

The invention claimed is:

1. A cosmetic comprising:
a powder surface-treated with a surface-treatment agent comprising a copolymer, the copolymer comprising:
a carbosiloxane dendrimer structure of the following formula (1):

wherein
Z is a divalent organic group;
p is 1;
each of R 1 and R 2 independently is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or an aralkyl group having 7 to 10 carbon atoms; and
L 1 is a silylalkyl group, in the case of i=1, as set forth by the following formula (2):

wherein
Z and p are the same as defined above;
R 1 and R 2 are the same as defined above;
i is an integer ranging from 1 to 10, which specifies the number of generations of the silylalkyl group;
L i+1 is a group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, an aralkyl group having 7 to 10 carbon atoms, and the silylalkyl group, with the proviso that in the case of i=c, in which c is an integer ranging from 1 to 10 and specifies the maximum generation of the silylalkyl group, L i+1 is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or an aralkyl group having 7 to 10 carbon atoms; and in the case of i<c, L i+1 is the silylalkyl group; and
a i is an integer ranging from 0 to 2; and
an unsaturated monomer having at least one silicon-bonded alkoxy group;
wherein the carbosiloxane dendrimer structure of formula (1) is the carbosiloxane dendrimer structure of formula (2) when the dendrimer structure has one generation; and at least one oil agent.

2. The cosmetic according to claim 1 , wherein the copolymer is obtained by copolymerizing (A) an unsaturated monomer having the carbosiloxane dendrimer structure of formula (1) and a group selected from the group consisting of:
(i) an acryl or methacryl group-containing organic group of the following general formula:

wherein R 4 is a hydrogen atom or a methyl group; and R 5 is an alkylene group having 1 to 10 carbon atoms,

(ii) an acryl or methacryl group-containing organic group of the following general formula:

wherein R 4 and R 5 are the same as defined above,

(iii) an alkenylaryl group-containing organic group of the following general formula:

wherein R 6 is a hydrogen atom or a methyl group; R 7 is an alkyl group having 1 to 10 carbon atoms; R 8 is an alkylene group having 1 to 10 carbon atoms; b is an integer ranging from 0 to 4; and c is 0 or 1, and
(iv) an alkenyl group having 2 to 10 carbon atoms; and
(B) an unsaturated monomer having at least one silicon-bonded alkoxy group.

3. The cosmetic according to claim 1 , wherein the copolymer is obtained by further copolymerizing (C) at least one unsaturated monomer having no silicon-bonded alkoxy group.

4. The cosmetic according to claim 3 , wherein (C) the at least one unsaturated monomer having no silicon-bonded alkoxy group has a C 1-6 alkyl group.

5. The cosmetic according to claim 3 , wherein the copolymer is obtained by copolymerizing
(A) an unsaturated monomer having the carbosiloxane dendrimer structure of formula (1),
(B) an unsaturated monomer having at least one silicon-bonded alkoxy group, and
(C) at least one of an unsaturated monomer having no silicon-bonded alkoxy group,
in a weight ratio satisfying conditions of {(weight of component (A))/(weight of all the monomers)}:{(weight of component (B))/(weight of all the monomers)}:{(weight of component (C))/(weight of all the monomers)} in the range of (0.02 to 0.7):(0.05 to 0.45):(0.01 to 0.75).

6. The cosmetic according to claim 3 , wherein the copolymer is obtained by copolymerizing
(A) an unsaturated monomer having the carbosiloxane dendrimer structure of formula (1),
(B) an unsaturated monomer having at least one silicon-bonded alkoxy group, and
(C) at least one of an unsaturated monomer having no silicon-bonded alkoxy group,
in a weight ratio satisfying conditions of {(weight of component (A))/(weight of all the monomers)}:{(weight of component (B))/(weight of all the monomers)}:{(weight of component (C))/(weight of all the monomers)} in the range of (0.02 to 0.7):(0.05 to 0.45):(0.01 to 0.75), and {(weight of component (A))/(weight of all the monomers)}>{(weight of component (B))/(weight of all the monomers)}.

7. The cosmetic according to claim 1 , wherein the oil agent is a silicone oil.

8. The cosmetic according to claim 7 , wherein the silicone oil is a hydrophobic silicone oil having a viscosity at 25° C. ranging from 0.65 to 100,000 mm 2 /s.

9. The cosmetic according to claim 7 , wherein the silicone oil is an organopolysiloxane of the following general formula (3) or (4):

wherein
R 9 is a hydrogen atom, a hydroxyl group or a group selected from monovalent non-substituted or fluorine- or amino-substituted C 1-30 alkyl groups, aryl groups, alkoxy groups and groups represented by (CH 3 ) 3 SiO{(CH 3 ) 2 SiO} 1 Si(CH 3 ) 2 CH 2 CH 2 —, wherein
1 is an integer ranging from 0 to 1,000;
a′ is an integer ranging from 0 to 3;
b′ is an integer ranging from 0 to 1,000; and
c′ is an integer ranging from 0 to 1,000, with the proviso that 1≦b′+c′≦2,000,

wherein
R 9 is the same as defined above;
d is an integer ranging from 0 to 8; and
e is an integer ranging from 0 to 8, with the proviso that 3≦d+e≦8.

10. The cosmetic according to claim 1 , further comprising at least one surfactant selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants and semi-polar surfactants.

11. The cosmetic according to claim 1 , further comprising at least one powder and/or at least one coloring agent.

12. The cosmetic according to claim 11 , wherein the at least one powder has an average particle size ranging from 1 nm to 20 μm, and is selected from the group consisting of inorganic pigment powders, organic pigment powders and resin powders.

13. The cosmetic according to claim 1 , further comprising at least one selected from the group consisting of water-soluble polymers, oil-soluble gelling agents and organo-modified clay minerals.

14. The cosmetic according to claim 1 , further comprising at least one selected from the group consisting of silicone resins, silicone elastomers and organo-modified silicones.

15. The cosmetic according to claim 1 , further comprising at least one UV-ray protective component.

16. A skin care product, a hair product, an antiperspirant product, a deodorant product, a makeup product or a UV-ray protective product comprising the cosmetic as recit

Assignees

• Iimura Tomohiro
• Furukawa Haruhiko
• Dow Corning Toray Co Ltd

Inventors

• Iimura Tomohiro
• Furukawa Haruhiko

Classifications

• C08L83/10 Primary

  Block- or graft-copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00) · CPC title

• C08G77/442 Primary

  containing vinyl polymer sequences · CPC title

• A61K8/895

  containing silicon bound to unsaturated aliphatic groups, e.g. vinyl dimethicone · CPC title

• A61Q17/04

  Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations · CPC title

• A61K2800/412

  Microsized, i.e. having sizes between 0.1 and 100 microns · CPC title