Mitsubishi Rayon Company, Limited

Nobuo Kameda

Yoshio Nakai

Akira Oshima

Kazunori Abe

Mitsuru Takahashi

There is provided a polymer composition consisting essentially of 95-50 wt% of a methyl methacrylate homopolymer or copolymer component and 5-50 wt% of a cross-linked elastomer obtained by copolymerizing a mixture of stated amounts of (I) alkyl acrylate, (II) allyl acrylate and/or allyl methacrylate and (III) benzyl acrylate, the elastomer having a stated average particle size and a stated extent of cross-linking. The polymer composition comprises (1) a graft copolymer obtained by polymerizing methyl methacrylate or its mixture in the presence of the above elastomer; or (2) a blend of the above graft copolymer and a methyl methacrylate homopolymer or copolymer. The polymer composition provides shaped articles exhibiting good transparency over a broad range of temperature as well as good weather resistance and impact resistance.

Methyl methacrylate polymer composition

An improvement in a process for producing a synthetic resin cast article having an abrasion-resistant polymer surface layer integrated with the polymer body is provided. The improvement is characterized in that the abrasion-resistant polymer surface layer is formed by a two step polymerization procedure; in the first polymerization step, the polymerizable material is covered with a covering body such as a polymer film, closely adhered thereto, and in the second polymerization step, the polymerizable material is exposed to the air.

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Otake, Japan

Nobuo Kameda