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:
Dec. 15, 2015
Filed:
Sep. 16, 2011
Applicants:
Hidekazu Kozuki, Suita, JP;
Kazuhiro Okamura, Suita, JP;
Inventors:
Hidekazu Kozuki, Suita, JP;
Kazuhiro Okamura, Suita, JP;
Assignee:
NIPPON SHOKUBAI CO, LTD, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F 26/08 (2006.01); C08F 26/06 (2006.01); C08F 26/10 (2006.01); C08F 126/10 (2006.01); C08F 226/10 (2006.01);
U.S. Cl.
CPC ...
C08F 26/08 (2013.01); C08F 26/06 (2013.01); C08F 26/10 (2013.01); C08F 126/10 (2013.01); C08F 226/10 (2013.01);
Abstract
The present invention provides an N-vinyl lactam polymer that is less likely to be colored (yellowing) even at high temperatures to maintain its color tone. The present invention provides an N-vinyl lactam polymer comprising a structural unit derived from an N-vinyl lactam monomer, the N-vinyl lactam polymer including a structural unit that has at least one of a hypophosphorous group and a group of hypophosphorous acid metal salt at a main chain terminal.