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:
Mar. 07, 2006
Filed:
Jul. 18, 2002
Applicants:
Takeshi Doi, Oumihachiman, JP;
Takeshi Miyamura, Kameoka, JP;
Masahiro Kouchi, Nara, JP;
Inventors:
Assignee:
Dai Ichi Kogyo Seiyaku Co., Kyoto, JP;
Primary Examiner:
Int. Cl.
CPC ...
D21H 17/57 (2006.01); D21H 21/20 (2006.01); C08L 75/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
For use as a wet strength agent, a water-soluble blocked urethane prepolymer having a hydrophilic group and a blocked isocyanate group is combined with a cationic charge-adjusting agent. The adsorption and retention of the water-soluble blocked urethane prepolymer to cellulosic fiber are promoted by virtue of the cationic charge adjusting agent when the wet strength agent is added to a paper-making stock.