Mitsubishi Chemical Corporation

Toshimitsu Inoue

Masaaki Miyamoto

Ryuji Uchimura

Yasuharu Mori

Kiyoji Kuma

Shin-ichi Sato

Takao Tayama

Yoshitaka Shiraishi

Motonori Ueda

Masaya Ueda

Shigeo Higashi

A polycarbonate composition excellent in both antistatic property and coloring matter coatability containing (a) a polycarbonate obtained by an ester exchange process, and (b) a compound having a molecular weight of from 300 to 8,000 and having any of ester bond, carbonate bond, amide bond and urethane bond in its molecule and an aromatic hydrocarbon group substituted by at least one alkyl group at the molecular end thereof, a write once read many optical disc substrate and a write once read many optical disc using the same and a process for the production of a write once read many optical disc are described.

Polycarbonate composition, write once read many optical disc substrate and write once read many optical disc using same and process for production of write once read many optical disc

Polycarbonate resin, optical information recording medium substrate comprising the same, and optical information recording medium

An improved process for producing N-vinylformamide including the steps of evaporating N-(.alpha.-substituted-ethyl)formamide or ethylidenebisformamide under reduced pressure and thermally decomposing the vapor at 150.degree.-600.degree. C., wherein the improvement comprises performing thermal decomposition by means of a pyrolysis reactor which is made up of two stages, the first being an unpacked tubular reactor constructed such that liquid flows down and the second being a packed tubular reactor, while keeping the vapor temperature at 200.degree.-400.degree. C. at the outlet of the unpacked tubular reactor and the inside temperature of the packed tubular reactor at 200.degree.-600.degree. C.

Production of N-vinylformamide

Growing community of inventors

Fukuoka, Japan

Toshimitsu Inoue