C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/2039
C08F 279/06 (2006.01) C08F 279/02 (2006.01) C08L 27/06 (2006.01) C08L 51/04 (2006.01)
Patent
CA 1201547
Abstract of the Disclosure A MBS resin useful as a reinforcement for vinyl chloride polymers and capable of improving the impact resistance of the vinyl chloride polymers without impairing the transparency thereof, which is prepared by graft- polymerizing a monomer mixture comprising an aromatic vinyl compound and an alkyl methacrylate onto a butadiene copolymer comprising styrene and butadiene, the butadiene copolymer being present in the polymerization system in a higher proportion as compared with a conventional MBS resin and present in the form of an aqueous latex of particles having a structure such that a portion formed in the last stage of a polymerization for the preparation of the butadiene copolymer amounting to 20 % by weight of the produced butadiene copolymer, has a very high butadiene content of 80 to 100 % by weight and moreover has at least 5 % by weight higher butadiene content than the average butadiene content of the produced butadiene copolymer.
431837
Hosoi Hideki
Takaki Akira
Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
Osler Hoskin & Harcourt Llp
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