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:
Jun. 09, 1998
Filed:
Jul. 30, 1996
Applicant:
Inventors:
Tsuyoshi Harakawa, Kyoto, JP;
Hisaki Tanabe, Kyoto, JP;
Assignee:
Nippon Paint Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08G / ;
U.S. Cl.
CPC ...
524590 ; 524591 ; 524839 ; 524840 ; 528 71 ;
Abstract
A polyurethane dispersion is disclosed, which is obtained by a process comprising the step of reacting a urethane prepolymer having both at least one anionic group and at least one cationic group in the molecule and having an isocyanate group at each of molecular ends thereof with a chain extender in water. The polyurethane dispersion is capable of forming a coating film having high acid and alkali resistance and has satisfactory dispersion stability.