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:
Jul. 18, 2006
Filed:
Dec. 20, 2004
Yoshio Irie, Himeji, JP;
Katsuhiro Kajikawa, Himeji, JP;
Kunihiko Ishizaki, Suita, JP;
Takumi Hatsuda, Himeji, JP;
Yoshio Irie, Himeji, JP;
Katsuhiro Kajikawa, Himeji, JP;
Kunihiko Ishizaki, Suita, JP;
Takumi Hatsuda, Himeji, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
In the production of an acrylate polymer by the steps of preparing a water-soluble unsaturated monomer having a ratio of neutralization in the range of 30 to 100 mol % and containing 50 to 100 mol % of an acrylate and then polymerizing the monomer, a method for the production of a hydrophilic resin which comprises using a water-soluble unsaturated monomer having a β-hydroxy propionic acid (salt) content of not more than 1,000 ppm. The hydrophilic resin obtained by this method exhibits excellent physical properties and has only a small residual monomer content. Further, a residual monomer content neither occurs nor increases in any using conditions.