Copolymer for cosmetic preparation

Details Copolymer for cosmetic preparation Copolymer for cosmetic preparation

2000-11-01

2003-11-04

Venkat, Jyothsan (Department: 1615)

Drug, bio-affecting and body treating compositions

Topical body preparation containing solid synthetic organic...

Skin cosmetic coating

C424S069000, C424S401000, C514S063000, C526S243000, C526S245000, C528S026000

Reexamination Certificate

active

06641805

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a copolymer for cosmetics which can be blended easily in a cosmetics preparation and is excellent in a waterproofing property, a water- and oil-repellency, feelings in use and safety, and to cosmetics characterized by containing the copolymer. The copolymer functions as a film-forming agent for cosmetics, a compatibilizer and emulsifier for a fluorine-containing raw material and a fluorine-free raw material, and a surface-treatment agent for fluorine compound-treated powders and silicone-treated powders.
RELATED ART
Heretofore, hydrocarbon-based emulsion resins have been used as film-forming agents for cosmetics. These are blended for the purpose of holding pigments or effective components in preparations on the skin for a long period of time by forming films after their application. However, because of their insufficient waterproofing properties and water- and oil-repellency, they are disadvantageous in that the films are broken by the contact with water or by sweat or sebum excreted from the skin. In addition, an acryl-silicone copolymer which has improved the drawbacks in the waterproofing property and the water-repellency of the hydrocarbon-based emulsion resins is in use recently (Japanese Patent Kokai Publication No. 2-247110 (247110/1990)). This is a copolymer of hydrocarbon-based acrylate and a silicone macromonomer, a film thereof being excellent in the waterproofing property and the water-repellency.
However, since the acryl-silicone copolymer also has low oil-repellency, it can not prevent the coming off of make-up caused by sebum. On the other hand, there is known a technique which contains a copolymer of an alkyl (meth)acrylate having a long-chain alkyl group having 8 or more carbon atoms and a polyfluoroalkyl (meth)acrylate having a polyfluoroalkyl group having 4 or more carbon atoms as a film-forming component in order to imparting the oil-repellency (Japanese Patent Kokoku Publication No. 3-46444 (46444/1991)). However, since this copolymer has a higher softening temperature than the skin temperature, it does not form any film in the form of emulsion dispersing in water. A copolymer having such a reduced molecular weight that the copolymer can dissolve in a solvent in order to form a film has no oil-repellency.
On the other hand, fluorine-containing raw materials such as a fluorine compound-treated powder and perfluoropolyether have recently come to be blended in cosmetic preparations. Since these fluorine-containing raw materials have poor affinities with fluorine-free raw materials such as those of hydrocarbon type and of silicone type which have been used widely, it is very difficult to blend them in preparations with stability. Therefore, the development of compatibilizers for the improvement in affinities between fluorine-containing raw materials and fluorine-free raw materials has been demanded.
SUMMARY OF THE INVENTION
According to the present invention, an intensive study for solving the above problems has made clear that when a fluorine-containing (meth)acrylate copolymer having a specific composition is dissolved or dispersed in water or solvents, the copolymer exhibits excellent properties as a copolymer for cosmetics. The copolymer for cosmetics of the present invention can be blended easily in conventional cosmetic preparations, and the cosmetics in which the copolymer is blended can form films excellent in waterproofing properties, water- and oil-repellency, feelings in use and safety after their application on the skin.
Furthermore, this copolymer for cosmetics serves as a compatibilizer between fluorine-containing raw materials and fluorine-free raw materials, whereby having the effect of stabilizing cosmetic preparations.
The present invention provides a copolymer for cosmetics comprising
(A) 5 to 99 parts by weight of repeating units derived from a fluorine-containing (meth)acrylate, and
(B) 95 to 1 parts by weight of repeating units derived from at least one silicon-containing polymerizable compound selected from the group consisting of a mercapto-modified silicone, an azo group-containing silicone and a polymerizable silane.
DETAILED DESCRIPTION OF THE INVENTION
The copolymer of the present invention may comprise (C) 1 to 50 parts by weight of repeating units derived from at least one fluorine-free monomer selected from the group consisting of a polylakyleneglycol (meth)acrylate, an alkyl (meth)acrylate macromonomer and an alkyl (meth)acrylate, in addition to the repeating units (A) and (B).
The copolymer may be:
(i) a copolymer comprising the fluorine-containing (meth)acrylate and the mercapto-modified silicone;
(ii) a copolymer comprising the fluorine-containing (meth)acrylate and the azo group-containing silicone;
(iii) a copolymer comprising the fluorine-containing (meth) acrylate and the polymerizable silane;
(iv) a copolymer comprising the fluorine-containing (meth) acrylate, at least one silicon-containing polymerizable compound selected from the group consisting of mercapto-modified silicone, azo group-containing silicone and polymerizable silane, and the polyalkyleneglycol (meth)acrylate;
(v) a copolymer comprising the fluorine-containing (meth)acrylate, at least one silicon-containing polymerizable compound selected from the group consisting of the mercapto-modified silicone, the azo group-containing silicone and the polymerizable silane, and the alkyl (meth)acrylate macromonomer; or
(vi) a copolymer comprising the fluorine-containing (meth)acrylate, at least one silicon-containing polymerizable compound selected from the group consisting of the mercapto-modified silicone, the azo group-containing silicone and the polymerizable silane, and the alkyl (meth)acrylate.
The fluorine-containing (meth)acrylate used for the copolymer for cosmetics has, for example, the following structural formula (I-1):
wherein Rf is a polyfluoroalkyl or perfluoropolyether group having 6 to 16 carbon atoms,
A is an alkylene group having 1 to 4 carbon atoms or
wherein R
1
is an alkyl group having 1 to 4 carbon atoms and R
2
is an alkylene group having 1 to 4 carbon atoms, or
and X is a hydrogen atom or a methyl group.
The fluorine-containing (meth)acrylate may be, for example, a fluorine-containing (meth)acrylate macromonomer having the following structural formula (I-2):
wherein Rf is a polyfluoroalkyl or perfluoropolyether group having 6 to 16 carbon atoms, A
1
is an alkylene group having 1 to 4 carbon atoms or
wherein R
1
is an alkyl group having 1 to 4 carbon atoms and R
2
is an alkylene group having 1 to 4 carbon atoms, or
and X
11
is a hydrogen atom or a methyl group, Y
11
is a hydrogen atom or a methyl group and m is from 5 to 100.
The polyfluoroalkyl group (Rf group) may be a perfluoroalkyl group.
The perfluoropolyether group is specifically as follows:
F(CF(CF
3
)CF
2
O)
n
CF
2
CF
2
—
wherein n is an integer of from 3 to 30,
CF
3
O(CF(CF
3
)CF
2
O)
n
(CF
2
O)
m
CF
2
—
wherein n is an integer of from 2 to 30 and m is an integer of from 3 to 70,
CF
3
O(CF
2
CF
2
O)
n
(CF
2
O)
m
CF
2
—
wherein n is an integer of from 2 to 40 and m is an integer of from 4 to 70, and
F(CF
2
CF
2
CF
2
O)
n
CF
2
CF
2
—
wherein n is an integer of from 3 to 30.
The number average molecular weight (determined by
19
F-NMR) of the perfluoropolyether group is preferably in the range of from 500 to 5,000.
Examples of the fluorine-containing (meth)acrylate are as follows:
CF
3
(CF
2
)
7
(CH
2
)OCOCH═CH
2
,
CF
3
(CF
2
)
6
(CH
2
)OCOC(CH
3
)═CH
2
,
(CF
3
)
2
CF(CF
2
)
6
(CH
2
)
2
OCOCH═CH
2
,
CF
3
(CF
2
)
7
(CH
2
)
2
OCOC(CH
3
)═CH
2
,
CF
3
(CF
2
)
7
(CH
2
)
2
OCOCH═CH
2
,
HCF
2
(CF
2
)
7
(CH
2
)
2
OCOCH═CH
2
,
CF
3
(CF
2
)
5
(CH
2
)
2
OCOCH═CH
2
,
CF
3
(CF
2
)
7
SO
2
N(CH
3
)(CH
2
)
2
OCOCH═CH
2
,
CF
3
(CF
2
)
7
SO
2
N(C
2
H
5
)(CH
2
)
2
OCOC(CH
3
)═CH
2
,
(CF
3
)
2
CF(CF
2
)
6
CH
2
CH(OCOCH
3
)CH
2OCOC(CH
3
)═CH
2
,
(CF
3
)
2
CF(CF
2
)
6
CH
2
CH(OH)CH
2
OCOCH═CH
2
,
F(CF(CF
3
)CF
2
O)
10
CF
2
CF
2
—COOCH
2
CH
2
CH═CH
2
,
These fluorine-containing (

Affiliated with

Also associated with

Rating

Copolymer for cosmetic preparation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Copolymer for cosmetic preparation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Copolymer for cosmetic preparation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3182946