Claims
- 1. A core-shell polymer which comprises
- (a) a core having a rubbery polymer phase obtained by polymerizing an alkyl acrylate wherein the alkyl group has 2 to 8 carbon atoms or a mixture of such alkyl acrylates with a crosslinking monomer and/or a graft monomer, said rubbery polymer phase being covered with an outer phase containing epoxy groups and obtained by polymerizing a vinyl monomer containing an epoxy group or copolymerizing said vinyl monomer containing an epoxy group with an alkyl acrylate or alkyl methacrylate wherein the alkyl is of 2 to 4 carbon atoms, and
- (b) a shell on the core, composed of a polymer having neither epoxy groups nor functional groups that are reactive with epoxy groups, and obtained by polymerizing a vinyl monomer,
- wherein said core-shell polymer comprises 80 to 95 weight % of said core, per total amount of monomers of the core-shell polymer, and 5 to 20 weight % of said shell, per total amount of monomers of the core-shell polymer, said core comprising 0.1 to 40 weight % of monomers containing an epoxy group per total amount of monomers of the core, and wherein the glass transition temperature of the shell is 40.degree. C. or higher and the glass transition temperature of the rubbery polymer is -30.degree. C. or lower.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-254553 |
Oct 1988 |
JPX |
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Parent Case Info
This application is a continuation of now abandoned application, Ser. No. 07/644,731 filed on Jan. 17, 1992, which in turn is a divisional of U.S. application Ser. No. 07/418,632, filed Oct. 10, 1989 now U.S. Pat. No. 5,006,592.
Foreign Referenced Citations (1)
Number |
Date |
Country |
49-20628 |
May 1974 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
418632 |
Oct 1989 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
644731 |
Jan 1991 |
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