公开(公告)号：US4690977A

公开(公告)日：1987-09-01

申请号：US897968

申请日：1986-08-20

申请人： Hideki Hosoi ,  Toshihiko Hasegawa ,  Taizo Aoyama

发明人： Hideki Hosoi ,  Toshihiko Hasegawa ,  Taizo Aoyama

IPC分类号： C08L27/00 ,  C08F285/00 ,  C08L1/00 ,  C08L27/06 ,  C08L33/00 ,  C08L33/02 ,  C08L51/00 ,  C08L51/02 ,  C08L51/04 ,  C08L57/08

CPC分类号： C08L27/06 ,  C08L51/00

摘要： A vinyl chloride polymer composition comprising(A) 3 to 50 parts by weight of a grafted copolymer and(B) 97 to 50 parts by weight of a vinyl chloride polymer, a total amount of the copolymer (A) and the polymer (B) being 100 parts by weight; the grafted copolymer (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 of alkyl acrylate having an alkyl group of 2 to 8 carbon atoms, 1 to 15% by weight of conjugated 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% by weight of alkyl acrylate having an alkyl group of 2 to 8 carbon atoms, 2 to 30% by weight of conjugated diolefin and 0 to 5% by weight of polyfunctional cross-linking agent and being 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 the core rubber copolymer (a), and a ratio of conjugated diolefin to acrylate in the surface rubber copolymer (b) is larger than a ratio of conjugated diolefin to acrylate in the core rubber copolymer (a) and the component (2) comprising(i) 30 to 95% by weight of methyl methacrylate and(ii) 70 to 5% by weight of at least one monomer selected from the group consisting of unsaturated nitrile, aromatic vinyl compound, alkyl acrylate having an alkyl group of 1 to 8 carbon atoms and alkyl methacrylate having an alkyl group of 2 to 4 carbon atoms. The vinyl chloride polymer composition has excellent impact resistance, weatherability and processability.