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. 20, 2010
Filed:
Jul. 31, 2007
Keiichi Fujise, Kyoto, JP;
Itsuko Hamaguchi, Kyoto, JP;
Akio Naka, Suita, JP;
Daijyo Tomihisa, Moriguchi, JP;
Keiichi Fujise, Kyoto, JP;
Itsuko Hamaguchi, Kyoto, JP;
Akio Naka, Suita, JP;
Daijyo Tomihisa, Moriguchi, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Dai-Chj Kogyo Seiyaki Co., Ltd., Kyoto, JP;
Abstract
Disclosed is a vinylpyrrolidone-based polymer composition which has improved storage stability and of which the reduction in the molecular weight (K value) under shear stress is small. The composition comprises a vinylpyrrolidone-based polymer and contains from 1 to 10000 ppm of at least one compound selected from a group consisting of biguanides and further contains from 1000 to 30000 ppm of 2-pyrrolidone and from 1 to 5000 ppm of ammonia.