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:
Apr. 12, 2005
Filed:
Sep. 24, 2001
Naohiko Uchiumi, Kurashiki, JP;
Kenichi Hamada, Tsukuba, JP;
Masaji Kato, Tsukuba, JP;
Tomohiro Ono, Tsukuba, JP;
Sachie Yaginuma, Tsukuba, JP;
Kazushige Ishiura, Tsukuba, JP;
Naohiko Uchiumi, Kurashiki, JP;
Kenichi Hamada, Tsukuba, JP;
Masaji Kato, Tsukuba, JP;
Tomohiro Ono, Tsukuba, JP;
Sachie Yaginuma, Tsukuba, JP;
Kazushige Ishiura, Tsukuba, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
A process for the preparation of an acrylic acid ester polymer, includes carrying out polymerization of an acrylic acid ester or block copolymerization of an acrylic acid ester and another (meth)acrylic monomer in the presence of an organolithium compound and an organoaluminum compound represented by the following formula (I):AlRRR  (I)wherein Rrepresents an alkyl group having at least 3 carbon atoms, an alkoxy group having at least 3 carbon atoms or an aryloxy group, Rand Reach independently represent an aryloxy group or may be coupled together to form an arylenedioxy group. The process makes it possible to heighten the reaction rate and living properties upon polymerization and heighten the block formation efficiency upon block copolymerization.