Vinyl chloride polymer composition

专利名称：Vinyl chloride polymer composition发明人：Hideki Hosoi,Toshihiko Hasegawa,Taizo

Aoyama

申请号：US06/721001申请日：19850408公开号：US04645795A公开日：19870224

摘要：A vinyl chloride polymer composition comprising (A) 3 to 50 parts by weight of agrafted copolymer and (B) 97 to 50 parts by weight of a vinyl chloride polymer, a totalamount of the copolymer (A) and the polymer (B) being 100 parts by weight; the graftedcopolymer (A) comprising

(1) 50 to 80 parts by weight of a rubber copolymer and

(2) 50 to 20 parts by weight of a grafting monomer, a total amount of the component(1) and the component (2) being 100 parts by weight;

the component (1) comprising

(a) 60 to 90% by weight of the rubber copolymer comprising 99 to 85% by weight ofalkyl acrylate having an alkyl group of 2 to 8 carbon atoms, 1 to 15% by weight ofconjugated diolefin and 0 to 5% by weight of polyfunctional cross-linking agent and

(b) 40 to 10% by weight of a surface rubber copolymer comprising 98 to 70% byweight of alkyl acrylate having an alkyl group of 2 to 8 carbon atoms, 2 to 30% by weightof conjugated diolefin and 0 to 5% by weight of polyfunctional cross-linking agent andbeing obtained by polymerizing the component (a) to give a core rubber copolymer and

then polymerizing the surface rubber copolymer component (b) in the presence of thecore rubber copolymer (a), and a ratio of conjugated diolefin to acrylate in the surfacerubber copolymer (b) is larger than a ratio of conjugated diolefin to acrylate in the corerubber copolymer (a)

and the component (2) comprising

(i) 30 to 95% by weight of methyl methacrylate and

< P>(ii) 70 to 5% by weight of at least one monomer selected from the groupconsisting of unsaturated nitrile, aromatic vinyl compound, alkyl acrylate having an alkylgroup of 1 to 8 carbon atoms and alkyl methacrylate having an alkyl group of 2 to 4carbon atoms. The vinyl chloride polymer composition has excellent impact resistance,weatherability and processability.

申请人：KANEGAFUCHI KAGAKU KOGYO KABUSHIKI KAISHA

代理机构：Armstrong, Nikaido, Marmelstein & Kubovcik

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