Multi-layer structure acrylic polymer composition

Abstract

A multi-layer structure polymer composition composed of an innermost layer (A), an elastomeric layer (B), an outermost layer (C), and at least one intermediate layer, said layer (A) having a glass transition temperature (Tg) of 10.degree. C. or higher and consisting of the reaction product of 51 to 100 parts by weight of an alkyl methacrylate whose alkyl group has 4 or less carbon atoms, 0 to 49 parts by weight of a copolymerizable monomer, 0 to 10 parts by weight of a polyfunctional monomer, and 0.1 to 5 parts by weight of a graftlinking agent; said layer (B) having a glass transition temperature (Tg) of 0.degree. C. or lower and consisting of the reaction product of 80 to 100 parts by weight of an alkyl acrylate whose alkyl group has 8 or less carbon atoms, 0 to 20 parts by weight of a copolymerizable monomer, 0 to 10 parts by weight of a polyfunctional monomer, and 0.1 to 5 parts by weight of a graftlinking agent; said layer (C) having a glass transition temperature (Tg) of 50.degree. C. or higher and consisting of the reaction product of 51 to 100 parts by weight of an alkyl methacrylate whose alkyl group has 4 or less carbon atoms, and 0 to 49 parts by weight of a copolymerizable monomer; and said intermediate layer consisting of the reaction product of 10 to 90 parts by weight of an alkyl methacrylate whose alkyl group has 4 or less carbon atoms, 90 to 10 parts by weight of an alkyl acrylate whose alkyl group has 8 or less carbon atoms, 0 to 10 parts by weight of a polyfunctional monomer, and 0.1 to 5 parts by weight of a graftlinking agent. The said polymer composition is excellent in transparency, gloss, and resistance to stress whitening and has good resistance to weather and impact.

Dependencies are inferred from the claim text.