Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2000-10-05
2002-01-29
Spear, James M. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S078030, C424S070120, C424S070122, C424S060000, C424S069000, C424S064000, C514S844000, C514S846000
Reexamination Certificate
active
06342239
ABSTRACT:
DETAILED DESCRIPTION OF THE INVENTION
1. Background of the Invention
This invention relates to a powder composition having good dispersing ability treated by a copolymer containing (A) an organopolysiloxane monomer and (B) one or more kinds of monomer selected from a group composed by a monomer containing nitrogen group, a monomer possessing a polyoxyalkylene group, a monomer possessing a polylactone group, a monomer possessing a hydroxyl group and a monomer possessing an anionic group, and a powder dispersion in oil comprising a said copolymers, powder and oil, further relates to a cosmetic composition containing a said powder composition and powder dispersion in oil.
2. Description of the Prior Art
Occasionally, powder which is not treated has problems such as cohesion based on electric charge or polar which powder surface has or deterioration of affinity to solvent based on interfacial tension of powder. To solve these problems and to improve dispersing ability, dispersion stability and feeling at actual use, various methods for surface treatment of powder by various kinds of improving agent are proposed.
Treating agents and methods which are used for the surface treatment are different according to each purpose, and are selected considering the surface property or the affinity to solvents. For example, lipophilic treatment by oil or metallic soap, hydrophilic treatment by surface active agent or aqueous polymer, water repellent or oil repellent treatment by silicone oil or others are well known.
OBJECT OF THE INVENTION
However, although these surface treated powder are improved by above mentioned methods, effects to avoid cohesion and sedimentation are not sufficient. And when the treating agent or treating method is not suited, various troubles occur, for example, powder and treating agent are dissociated in a cosmetic composition and the powder coheres and sediments by aging, or re-dispersing ability is deteriorated and the quality of products and the feeling at use are spoiled.
The object of the present invention is to provide a powder composition and a powder dispersion in oil which have less cohesiveness and is superior at dispersing ability, further a cosmetic composition which has an excellent sensation upon use and a good stability by containing a said powder composition and powder dispersion in oil.
BRIEF SUMMARY OF THE INVENTION
The inventors of this invention have conduced earnest study and found that the above mentioned problems can be solved by using a copolymer which has a specific construction and feature, and accomplished the present invention.
That is, the present invention is, a powder composition comprising a copolymer containing (A) an organopolysiloxane monomer, and one or more kinds of monomer selected from a group composed by (B) a monomer containing nitrogen group, a monomer possessing a polyoxyalkylene group, a monomer possessing a polylactone containing group, a monomer possessing a hydroxyl group and a monomer possessing an anionic group, and a powder dispersion in oil composed by a said copolymers, powder and oil, further relates to a cosmetic composition containing a said powder composition and powder dispersion in oil.
DISCLOSURE OF THE INVENTION
A copolymer which can be used in this invention is the copolymer which contains (A) an organopolysiloxane monomer and (B) a monomer containing nitrogen group or a monomer possessing a polyoxyalkylene group, a monomer possessing a polylactone containing group, a monomer possessing a hydroxyl group and a monomer possessing an anionic group as the construction component.
As an organopolysiloxane monomer of (A), it is desirable to be an organopolysiloxane monomer having radical polymerization group which can copolymerize with (B) monomer, concretely vinyl group, and organopolysiloxane monomer represented by following general formula (I) can be mentioned.
W(X)
a
Si(Y)
b
(Z)
c
(1)
In this formula, W represents a vinyl group, X represents a divalent bonding group, Y represents a hydrogen atom, an alkyl group of carbon number 1~10, an aryl group or an alkoxy group and Z represents a monovalent siloxane polymer, further, a is an integer of 0 or 1, b is an integer of 0~2, and c is an integer of 1~3, wherein said vinyl group can possess a substitution group and b+c=3.
Among the monomer (A), as the concrete example which can be preferably used, compounds represented by following chemical formula can be mentioned.
As the (B) monomer containing nitrogen group, a nitrogen containing group possessing radical polymerization group such as vinyl monomer which has nitrogen containing group can be mentioned. for example, N,N-dimethylaminoethylacrylate, N,N-diethylaminoethyl acrylate, N,N-dimethylaminoethylmethacrylate, N,N-diethyl aminoethylmethacrylate and a quaternary salt of them; acrylamide, N-methylacrylamide, N-ethylacrylamide, N-n-propylacrylamide, N-isopropylacrylamide, N-n-butyl acrylamide, N-isobutylacrylamide, N-t-butylacrylamide, N-octylacrylamide, N-octadecylacrylamide, N-phenyl-acrylamide, N-methylolacrylamide, N-allylacrylamide, N-diacetoneacrylamide; methacrylamide, N-methylmethacrylamide, N-ethyl methacrylamide, N-n-propylmethacrylamide, N-iso propylmethacrylamide, N-n-butylmethacrylamide, N-iso butylmethacrylamide, N-t-butylmethacrylamide, N-octyl methacrylamide, N-octadecylmethacrylamide, N-dodecylmethacrylamide, N-phenylmethacrylamide, N-methylolmethacrylamide, N-allylmethacrylamide; &agr;-ethylacrylamide; N,N-dimethylacrylamide, N,N-diethylacrylamide, N,N-diisopropylacrylamide, N,N-di-n-butylacrylamide, N,N-dimethylmethacrylamide, N,N-diethylmethacrylamide, N,N-diisopropylmethacrylamide, N,N-di-n-butylmethacrylamide; N,N-dimethylaminoethylacrylamide, N,N-dimethylaminoethylmethacrylamide, N,N-dimethylaminopropylacrylamide, N,N-dimethylaminopropylmethacrylamide and a quaternary salt of them, N-vinyl-N,N-dimethylamine, N-vinyl-N-ethyl-N-butylamine and a quaternary salt of them; o-aminostyrene, m-aminostyrene, p-aminostyrene, o-N,N-dimethylaminostyrene, m-N,N-dimethylaminostyrene, p-N,N-dimethylaminostyrene; N-vinylpyrrolidone, N-vinyl-3-methylpyrrolidone, N-vinyl-5-methylpyrrolidone, N-vinyl-3,3,5-trimethylpyrrolidone, N-vinylpiperidone, N-vinylcaprolactam, N-vinylcaprylolactam, N-vinylformamide, N-vinylacetoamide, N-vinylpropionic acid amide, N-vinylbenzoic acid amide, N-methyl-N-vinylbenzoic acid amide, N-phenyl-N-vinylacetoamide; N-phenyl-N-vinylbenzoic acid amide, diallyldimethylammoniumchloride, N-vinylmaleicimide, vinylpyridine, N-vinylimidazole, N-vinylcarbazole, N-acylalkyleneimine whose end group is sealed and N-alkylenecarbobetaine can be mentioned, and one or more kinds selected from these compounds can be used. Especially, acrylamide, methacrylamide, N-vinylpyrrolidone and N-vinylacetoamide are preferably used.
As the (B) monomer containing polyoxyalkylene group, a monomer possessing radical polymerization group and polyoxyalkylene group, concretely a monomer possessing vinyl group and polyoxyalkylene group can be mentioned. For example a monomer possesses polyoxyalkylene group represented by following general formula (2) can be mentioned.
J(K)
p
(Q)
s
T (2)
In the formula, J represents a vinyl group (can possess substitution group), K represents a divalent bonding group, Q represents a polyoxyalkylene group represented by —(CH
2
)
t
O— and T represents a hydrogen atom, an alkyl group of carbon number 1~10 or an organic group represented by R′—(CO)—, further,
p
is an integer of 0 or 1,
s
is an integer bigger than 1,
t
is an integer of 1~50 and R′ represents alkyl group of carbon number 1~5.
Concretely, compounds represented by following chemical formula can be mentioned. These compounds can be used alone or can be used together with. Among these compounds, a monomer containing polyoxyalkylene group whose
t
is an integer bigger than 3 is desirably used, especially a monomer contains
t
=3 polyoxypropylene group is more desirable.
CH
2
═C(CH
3
)COO(C
2
H
4
O)
2
H
CH
2
═C(CH
3
)COO(C
2
H
4
O)
4
CH
3
CH
2
═CHCOO(
Shimizu Toru
Tachibana Kiyomi
KoséCorporation
Spear James M.
LandOfFree
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