Mitsubishi Rayon Company, Limited

Katsumi Tamai

Kazumasa Kamada

Kazunori Abe

Yoshio Nakai

Tetsuji Kato

Yoshinobu Shiraishi

Haruyoshi Kitahara

Yasunori Shimomura

Isao Kamada

Tadaomi Ueno

Yasuhiko Iwaoka

Hiroshi Kichiji

Kiyonori Okajima

A novel methacrylic resin shaped article is made of novel compositions comprising (A) 80 to 99.9% by weight of methyl methacrylate polymer or copolymer, which forms continuous phase, and (B) 0.1 to 20% by weight of a polymer obtained from at least one unsaturated monomer of the general formula ##STR1## wherein R.sub.1 is H or methyl group and R.sub.2 is a hydrocarbon radical of at least two carbon atoms, a derivative or monomer mixture thereof, the respective refractive indexes (n.sub.A) and (n.sub.B) of said (A) and (B) polymers satisfying the relation of 0.998.ltoreq.n.sub.B /n.sub.A .ltoreq.1.002. The above shaped article has a latent mat surface, which therefore may be converted to a mat surface merely by means of stretching at a temperature above heat distortion temperature.

Methacrylic resin shaped article, process for producing the same and

A methacrylic resin having reduced water absorption properties, useful in optical instruments and as information recording substrates, is produced by polymerizing a mixture consisting of (A) 50 to 85% by weight of a methyl methacrylate, (B) 15 to 50 by weight of a cyclohexyl methacrylate and (C) 0 to 30% by weight of the other copolymerizable with said monomer (A) and (B), or partially polymerized product thereof.

Process for producing a low hygroscopic methacrylic resin and

A process for continuously casting a sheet and the like, comprising, running two feed belts positioned in face-to-face relationship to each other, opposed belt surfaces of said belts being in the same direction without relatively displacement; running at least two gaskets together with the two belt surfaces at the both edges thereof; maintaining the opposed surfaces in any position rigid in the direction perpendicular to the running one and flexible in the running direction; supplying material between the belts from one side thereof; supporting the opposed belt surfaces by pressure of the material and retaining a gap in desired thicknesses between the belt surfaces in desired positions thereof; treating continuously the material between the belt surfaces and delivering treated sheet from the other side of the belts.

Apparatus for continuously casting a sheet and the like

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Ohtake, Japan

Katsumi Tamai