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:
Feb. 21, 2012
Filed:
Jul. 21, 2006
Kenichi Hamada, Tsukuba, JP;
Susumu Matsunaga, Kurashiki, JP;
Kazunori Watanabe, Kurashiki, JP;
Masaji Kato, Tsukuba, JP;
Jun Nagai, Kurashiki, JP;
Tatsufumi Watanabe, Kamisu, JP;
Tatsuo Morotomi, Kamisu, JP;
Hiroshi Oshima, Kamisu, JP;
Kenichi Hamada, Tsukuba, JP;
Susumu Matsunaga, Kurashiki, JP;
Kazunori Watanabe, Kurashiki, JP;
Masaji Kato, Tsukuba, JP;
Jun Nagai, Kurashiki, JP;
Tatsufumi Watanabe, Kamisu, JP;
Tatsuo Morotomi, Kamisu, JP;
Hiroshi Oshima, Kamisu, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
The present invention relates to a method of obtaining a (meth)acrylate-based polymer from a reaction solution containing the (meth)acrylate-based polymer, the method including (a) adding an acid to the reaction solution containing the (meth)acrylate-based polymer which is obtained by polymerizing a monomer composed mainly of a (meth)acrylate in a water-insoluble organic solvent in the presence of a metal compound, (b) washing the reaction solution to which the acid has been added by admixing water at 90° C. or more, (c) separating the mixed solution of the reaction solution and water generated by the washing in (b) into an organic solvent solution layer and an aqueous solution layer, and (d) isolating each of the organic solvent solution layer and the aqueous solution layer in order to obtain the (meth)acrylate-based polymer from the isolated organic solvent solution layer.