Kanegafuchi Kagaku Kogyo Kabushiki Kaisha

Hideki Hosoi

Toshihiko Hasegawa

Kuniyoshi Matsuba

A vinyl chloride resin composition including: (1) 100 parts by weight of a vinyl chloride resin and (2) 0.1 to 30 parts by weight of a two-stage polymer, said polymer (2) being prepared by emulsion-polymerizing 60 to 95 parts by weight of a monomer mixture (A) of 50 to 95% by weight of methyl methacrylate, 5 to 50% by weight of an alkyl methacrylate with a C.sub.2 to C.sub.8 alkyl group and 0 to 20% by weight of a vinyl monomer to give a polymer latex and then polymerizing 40 to 5 parts by weight of a monomer mixture (B) of 20 to 80% by weight of an alkyl acrylate and/or an alkyl methacrylate other than methyl methacrylate, 80 to 20% by weight of methyl methacrylate and 0 to 20% by weight of a vinyl monomer in the presence of said polymer latex, said polymer (2) having a particle size of not more than 1000 .ANG. in the latex, and a specific viscosity at 30.degree. C. of the solution wherein 0.4 g of said polymer (2) is dissolved in 100 ml of benzene of 1 or more. The composition is excellent in transparency and secondary processability as well as in processability. Thus, a composition having excellent properties can be prepared by admixing a small amount, such as 0.1 to 30 parts by weight of the two-stage polymer as the agent for improving the processability with 100 parts by weight of the vinyl chloride resin.

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Kakogawa, Japan

Kuniyoshi Matsuba