Mitsubishi Chemical Industries Limited

Seiji Yoshida

Masayoshi Hasuo

Masahiro Nukui

Seiichi Mukai

Hiroshi Urabe

Atsushi Murakami

Nobuo Enokido

Toru Tanaka

Kazuo Yamaguchi

Natsuki Kanoh

A polycarbonate containing from 25 to 100% by weight, based on the total carbonate bond-constituting units, of carbonate bond-constituting units each containing at least one pendant aromatic group, and having an average molecular weight of from 9,500 to 14,000.

Polycarbonate and optical disc substrate

An optical disc substrate made of a polycarbonate containing from 5 to 100% by weight, based on the total carbonate bond-constituting units, of carbonate bond-constituting units having the formula: ##STR1## wherein each of Y and Z is a hydrogen atom or an aliphatic hydrocarbon group having from 1 to 6 carbon atoms, and each of X and W is an aliphatic hydrocarbon group having from 1 to 6 carbon atoms.

Optical disc substrate made of a copolycarbonate

A solid catalytic complex for the polymerization of an olefin has the formula:

Catalyst and process for polymerization of olefin

Growing community of inventors

Kawasaki, Japan

Seiji Yoshida