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:
May. 31, 2011
Filed:
May. 26, 2004
Shoji Yamaguchi, Chiba-ken, JP;
Hideo Kubo, Ichihara, JP;
Shoji Yamaguchi, Chiba-ken, JP;
Hideo Kubo, Ichihara, JP;
Nippon Soda Co., Ltd., Tokyo, JP;
Abstract
The object of the present invention is to provide a process for industrially advantageously producing a polymer having a high molecular weight and a narrow, monodispersed molecular weight distribution, and more particularly, a block copolymer of an anionic polymerizable monomer and an acrylic monomer. The object of the present invention was able to be achieved by reacting an acrylic monomer with a polymer anion, the terminal of which has been modified by a compound that forms a living carbanion capable of polymerizing an anionic polymerizable monomer by reacting with an anion, but which itself does not polymerize, in the presence of a compound represented by formula (1): (R1)nM (wherein, R1 represents a C1-C20 alkyl group or a C6-C20 aryl group, R1 may be the same or different in the case n is 2 or more, M represents an atom belonging to Group 2, 12 or 13 of the long form of the periodic table, and n represents the valency of M).