The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 2000
Filed:
May. 20, 1997
Hajime Shouzaki, Ichihara, JP;
Norio Tomotsu, Ichihara, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
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.