C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/12 (2006.01) C08L 33/10 (2006.01) C08L 51/04 (2006.01)
Patent
CA 2064173
PROCESS FOR THE PREPARATION OF RUBBER-CONTAINING GRAFT COPOLYMER PARTICLES ABSTRACT OF THE DISCLOSURE Rubber-containing graft copolymer particles excellent in powder properties are prepared by a process comprising mixing, with 100 parts by weight (as solid content) of rubber-containing graft copolymer (A) in a state of slurry, 0.1 to 10 parts by weight of a rigid non-elastic multi-stage polymer (B), in a state of slurry, consisting of 30 to 80% by weight of a (co)polymer component comprising 40 to 100% by weight of methyl methacrylate and 0 to 60% by weight of one or more other monomers copolymerizable therewith being polymerized at least in the first stage and 5 to 70% by weight of a (co)polymer component comprising 70 to 100% by weight of methyl methacrylate and 0 to 30% by weight of one or more other monomers copolymerizable therewith being polymerized in the final stage, the total amount of the (co)polymer components in the respective stages being 100% by weight and the content of polymeric units derived from an acrylic ester in the multi-stage polymer (B) being from 5 to 30% by weight.
Matsumoto Koji
Morimoto Masaru
Finlayson & Singlehurst
Mitsubishi Rayon Company Ltd.
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