Drug – bio-affecting and body treating compositions – Manicure or pedicure compositions
Reexamination Certificate
2000-08-23
2003-09-09
Venkat, Jyothsan (Department: 1615)
Drug, bio-affecting and body treating compositions
Manicure or pedicure compositions
C514S063000
Reexamination Certificate
active
06616920
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a nail-care composition such as a nail enamel, a nail enamel base coat and a nail enamel top coat, a method of coating nails and a kit for coating nails, in which the nail-care composition comprises a nail-care polymer recovered by copolymerizing a polysiloxane compound of a specific structure with a radical polymerizable monomer.
2. Description of the Related Art
Polymers prepared by copolymerization of monomers with polysiloxane group for use in nail-care products are described in Japanese Patent Laid-open Nos. 5-213719/1994, 8-143427/1996 and 9-183711/1997. In these nail-care polymers, great characteristic properties of polysiloxane are actively utilized. Therefore, these nail-care polymers can give great gloss and smooth touch to nail, owing to the great drying properties.
However, these polymers are all copolymers of silicone macromonomer with a radical polymerizable unsaturated bond on one end with other monomers, so the reactivity of silicone macromonomer is insufficient although the smoothness can be improved. Particularly when high-molecular silicone macromonomer is used, the macromonomer unreactive is likely to remain. When such unreactive macromonomer remains, the macromonomer exerts its action as a plasticizer of the coating film after drying, so that the film strength is decreased or the adhesion is decreased due to bleed out, which can disadvantageously cause peeling off or insufficient adhesion between coatings when used in lamination, leading to insufficient durability. As described above, no nail-care polymer with entirely satisfactory performance has been heretofore produced.
Hair-care products containing a copolymer containing a hydrophilic unsaturated monomer and an unsaturated monomer having a polysiloxane group, in which the polysiloxane group-containing monomer has at least one unsaturated group are disclosed in U.S. Pat. Nos. 5,166,276 and 5,480,634.
SUMMARY OF THE INVENTION
It is a purpose of the invention to provide a nail-care composition comprising a nail care polymer with great adhesion to nail, good surface smoothness and gloss and high coating durability when used in a nail-care product. Additionally, it is the other purpose of the invention to provide a nail-care composition comprising a nail-care polymer with excellent adhesion between layers when used as base coat and top coat.
It is another embodiment of the present invention to provide a method of coating nails with a nail-care composition.
It is another embodiment of the present invention to provide a kit comprising a nail-care composition and a brush for applying said nail care composition.
So as to attain the purposes, the present inventors have made various investigations. The inventors have found that a polymer with satisfactorily great performance for use in nail-care products can be produced by using a specific quantity of a specific polysiloxane compound with radical polymerizable unsaturated bonds at both the ends. Thus, the invention has been achieved.
In accordance with the invention, more specifically, it is provided a nail-care composition comprising a nail-care polymer of a weight average molecular weight of 30,000 to 1,500,000, comprising 0.5 to 90% by weight of a constitutive unit derived from a polysiloxane compound with radical polymerizable unsaturated bonds on both the ends of the molecular chain as represented by the following formula (1) (sometimes abbreviated as “Compound A” hereinbelow) and 10 to 99.5% by weight of a constitutive unit derived from a radical polymerizable monomer copolymerizable with the Compound A (sometimes abbreviated as “Compound B” hereinbelow):
where D and D′ may be the same or different and each independently represent an unsaturated bond-containing group represented by the following formula (2) or (3):
R
1
and R
3
may be the same or different and represent hydrogen atom, an alkyl group with one to 10 carbon atoms, aryl group, or a polyoxyalkylene group with the end substituted with hydroxyl group, alkoxyl group or alkylcarbonyloxy group; R
2
represents hydrogen atom or methyl group; X represents amino (—NH—) group or oxygen atom; n represents an integer of 4 to 500; p represents an integer of 1 to 4; q represents an integer of 0 to 4; and m represents an integer of 0 to 4.
In one preferable embodiment of the invention, it is provided the nail-care polymer wherein n is an integer of 50 to 500 in the compound of the formula (1) the nail-care polymer wherein the ratio of the content of the constitutive unit derived from the Compound A is within a range of 0.5 to 50% by weight; the nail-care polymer wherein the ratio of the content of the constitutive unit derived from the Compound B is within a range of 50 to 99.5% by weight; or the nail-care polymer wherein the constitutive unit derived from the Compound B comprises a constitutive unit derived from a hydrophilic unsaturated monomer (sometimes abbreviated as Compound BI hereinbelow) or a mixture comprising the aforementioned constitutive unit and a constitutive unit derived from a hydrophobic unsaturated monomer (sometimes abbreviated as Compound B2 hereinbelow) and the ratio in weight of the contents of the Compound B1 and the Compound B2 (sometimes abbreviated as B1/B2 hereinbelow) is within a range of preferably 0/100 to 75/25, more preferably 0/100 to 40/60.
In another preferable embodiment of the invention, it is provided the nail-care polymer wherein the Compound B1 is a monomer selected from the group consisting of a hydrophilic unsaturated monomer with a nonionic group, an anionic group, a cationic group or an amphoteric ion group; the nail-care polymer wherein the Compound B1 is a monomer selected from the group consisting of a hydrophilic unsaturated monomer with a cationic group (sometimes abbreviated as cationic monomer hereinbelow), a mixture of the cationic monomer and a hydrophilic unsaturated monomer with an anionic group, a hydrophilic unsaturated monomer with an amphoteric ion group (sometimes abbreviated as amphoteric ion monomer hereinbelow), and a mixture of the amphoteric ion monomer and the cationic monomer, or a mixture thereof; the nail-care polymer wherein the Compound B1 is at least one compound selected from the group consisting of acrylic acid, methacrylic acid, an acrylate salt and a methacrylate salt; the nail-care polymer wherein the Compound B1 is an amphoteric compound represented by the following formula (4)
where
R
6
represents hydrogen atom or methyl group; R
4
and R
5
independently represent an alkyl group with one to 4 carbon atoms; X represents amino (—NH—) group or oxygen atom; s represents an integer of 2 to 6; and t represents an integer of 1 to 4;
or the nail-care polymer wherein the Compound B1 is an amine oxide compound represented by the following formula (5):
where
R
7
represents hydrogen atom or methyl group; R
8
and R
9
independently represent an alkyl group with one to 4 carbon atoms; X represents amino (—NH—) group or oxygen atom; and v represents an integer of 2 to 6.
In accordance with another embodiment of the invention, kit comprising a nail-care composition comprising the nail-care polymer and an applicator for said nail-care composition is additionally provided, together with a nail-care method comprising coating the nail-care composition on a nail.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The nail-care polymer of the invention is a polymer of a weight average molecular weight of 30,000 to 1,500,000, comprising 0.5 to 90% by weight of a constitutive unit derived from a polysiloxane compound (Compound A) with radical polymerizable unsaturated bonds at both the ends of the molecular chain as represented by the formula (1), and 10 to 99.5% by weight of a constitutive unit derived from a radical polymerizable monomer (Compound B) copolymerizable with the Compound A.
Additionally, the Compounds A and B individually comprise only one type of each of such compounds or two or more types of each of such compounds in combination,
Hayama Kazuhide
Hiwatashi Tomoaki
Ito Kayo
Kawaguchi Shigeoki
Saito Yukio
Mitsubishi Chemical America, Inc.
Venkat Jyothsan
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