Sumitomo Chemical Company, Limited

Masataka Yanase

Takuzo Okumura

Hitoshi Kikui

Hiroyuki Kanazawa

Takaki Hamada

A light-polarizing plate for display use is improved in its humid, thermal and weather durabilities by controlling moisture content of a light-polarizing film made of polyvinylalcohol prior to be laminated with protector film and also by using as protector film a hydrophobic polymer film having low water vapor transmission.

Method of making a light-polarizing plate

Light-polarizing plate having excellent durability and production of the

In the production of a casting syrup, useful in a continuous casting process for manufacture of cast plates, by partial polymerization of methyl methacrylate or its mixture with at least one unsaturated vinyl compound copolymerizable therewith in an amount of not more than about 20% by weight based on methyl methacrylate, an improved method wherein the partial polymerization is carried out in the presence of a thiodicarboxylic acid ester of the formula:

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Tokyo, Japan

Masataka Yanase