Graft copolymers of alkyl methacrylates onto cross- linked...

Details Graft copolymers of alkyl methacrylates onto cross- linked... Graft copolymers of alkyl methacrylates onto cross- linked...

C - Chemistry, Metallurgy

08

F

400/2030, 400/30

C08F 265/06 (2006.01) C08L 27/06 (2006.01) C08L 51/04 (2006.01)

Patent

CA 1234440

ABSTRACT OF THE DISCLOSURE The impact resistance of resin compositions consisting of a thermoplastic polymer, particularly a homopolymer or copolymer of vinyl chloride, can be improved by an impact additive of the graft copolymer type. The graft copolymer impact additive consists of a backbone composed of a statistical copolymer of butadiene or isoprene, an alkyl acrylate of a C2 to C12 alkyl, and a polyfunctional cross-linking agent, onto which are grafted the chains of a polymer of an alkyl methacrylate of a C1 to C4 alkyl, particularly methyl methacrylate. The backbone of the graft copolymer impact additive comprises 0.5-35% by weight butadiene or isoprene, and up to 10 mole % of the cross-linking agent, while the weight ratio of grafted chains to the backbone can range from 10 to 200%. The resin compositions are particularly useful to improve impact strength at low temperatures.

461912

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