Plastic articles having improved surface characteristics

Claim 1

A plastic article having improved surface characteristics and comprising a plastic body having adhered thereon a cross-linked film of a composition consisting essentially of: A. 10 to 90 parts by weight of a crosslinking unsaturated compound having a molecular weight of M and containing in the molecule N polymerizable ethylenically unsaturated radicals, N being an integer of at least 2, and selected from the group consisting of allyl acrylate, allyl methacrylate; methallyl acrylate; di- and tetra-esters of α,β-unsaturated carboxylic acids with polyhydric alcohols; addition products of glycidyl acrylate or methacrylate with polybasic carboxylic acids; addition products of an epoxy resin with acrylic acid, methacrylic acid and crotonic acid; polyethylene glycol dimethacrylate and polypropylene glycol dimethacrylate; the ratio of said molecular weight M to said number N of ethylenically unsaturated radicals, M/N, being about 49 to about 600; B. 90 to 10 parts by weight of an unsaturated monomer selected from the group consisting of acrylic acid; methacrylic acid; itaconic acid; crotonic acid; unsaturated carboxylic acids represented by the formula: ##EQU8## wherein R 1 is a hydrogen atom or a methyl group, R 2 is an alkylene group having 1 to 8 carbon atoms, and R 3 is an alkylene group having 1 to 8 carbon atoms, --CH=CH-- or ##SPC2## unsaturated carboxylic acids represented by the formula: ##EQU9## wherein R 1 and R 3 are the same as defined above; styrenesulfonic acid; and monoallyl and monomethallylesters of dibasic carboxylic acids; and C. up to 20 parts by weight of other copolymerizable unsaturated compound selected from the group consisting of monoesters of acrylic acid, methacrylic acid and crotonic acid with polyhydric alcohols; diacetone acrylamide; diacetone methacrylamide; N-methylol acrylamide and N-methylol methacrylamide; the total of (A), (B), and (C) being 100 parts by weight, at least a part of the acid radicals being converted into alkali salts thereof, said cross-linked film having a thickness of 5 to 500 μ and said plastic body being composed of homopolymers or copolymers of monovinyl monomers selected from the group consisting of methyl methacrylate, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, lauryl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, styrene, acrylonitrile, methacrylonitrile, vinyl chloride, and vinylidene chloride; copolymers of said monovinyl monomers with small amounts of crosslinking agents selected from the group consisting of ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, trimethylol propane triacrylate, and glycerine triacrylate; and unsaturated polyesters cured by crosslinking.