Idemitsu Kosan Company, Limited

Idemitsu Petrochemical Co., Ltd.

Hajime Shouzaki

Norio Tomotsu

Mizutomo Takeuchi

Masahiko Kuramoto

Masanori Sera

Styrene polymer and molded object obtained by molding the polymer

A styrene type monomer is polymerized by use of a catalyst consisting of (a) a transition metal compound, (b1) a compound capable of forming an ionic compound by reacting with the transition metal compound, and if necessary (d) an alkylating agent, which comprises subjecting to a polymerization reaction a monomer to which (c) an oxygen-containing compound having a branched alkyl group, or (c) said oxygen-containing compound and (d) all or a part of an alkylating agent have previously been added, or by a process for producing a polymer in which a monomer particularly a styrene type monomer is polymerized by use of a catalyst consisting of (a) a transition metal compound, (b1) a compound capable of forming an ionic compound by reacting with the transition metal compound, (b2) a specific oxygen-containing compound, and if necessary (d) an alkylating agent, which comprises subjecting to a polymerization reaction a monomer to which (c) an oxygen-containing compound having a branched alkyl group, or (c) said oxygen-containing compound and (d) all or a part of an alkylating agent have previously been added.

Process for producing polymer

Catalyst for production of vinyl-based polymer and process for

Catalyst for producing sytrenic polymer and process for producing

Process for producing aromatic vinyl compound-based copolymer

Catalyst for producing aromatic vinyl compound-based polymer composition

Growing community of inventors

Ichihara, Japan

Hajime Shouzaki