Tokuyama Soda Kabushiki Kaisha

Kazuo Shikata

Yasuji Kida

Shunichi Nakamura

Yukio Mizutani

Michio Yoshimizu

Toshiaki Shigemune

Yoshinori Mizumoto

A solid state track detector composed of a crosslinked copolymer, said copolymer consisting essentially of

Solid state track detector composed of copolymer of alkylene glycol

A cured resin consisting substantially of a first polymer unit derived from an unsaturated compound having two terminal vinyl groups consisting of bis(alkyleneoxyphenyl)-diacrylates or dimethacrylates, bis(alkyleneoxyphenyl)diallyl ethers, and bis(alkyleneoxyphenyl)diallyl carbonates, and a second polymer unit derived from another unsaturated compound radical-polymerizable with the first-mentioned unsaturated compound, said polymer units being bonded to each other at random. The aforesaid cured resin can be producted by copolymerizing an intimate mixture consisting substantially of at least one compound selected from the first-mentioned unsaturated compounds having two terminal vinyl groups and prepolymers thereof and at least one compound selected from other unsaturated compounds radical-copolymerizable with the first-mentioned unsaturated compounds and prepolymers thereof in the presence of a radical polymerization initiator. A lens composed of the aforesaid cured resin has a high refractive index, excellent transparency and excellent fire retardancy.

Novel cured resin, process for production thereof, and lens composed of

A process for producing an organic carbonate, which comprises reacting an alkali metal carbonate, carbon dioxide gas, an alcohol and an organic halide in the presence of a catalyst.

Process for preparing organic carbonates

A process for producing flame-retardant shaped articles of thermoplastic synthetic resins is disclosed which process comprises dispersing homogeneously in a thermoplastic synthetic resin an inorganic metal compound and a surfactant, said inorganic metal compound being one capable of forming a hydrate by reacting with a member of the group consisting of water and an aqueous acid solution, forming the resulting composition into a desired shaped article, and thereafter contacting the thus obtained shaped article with a member selected from the group consisting of water and an aqueous acid solution, thereby converting said inorganic metal compound contained in said shaped article to a hydrate.

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Tokuyama, Japan

Kazuo Shikata