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:
Oct. 07, 1997
Filed:
Nov. 09, 1995
Applicant:
Inventors:
Mitsuo Yamada, Suita, JP;
Ichiro Kawakami, Takatsuki, JP;
Assignee:
Nippon Paint Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08L / ; C08L / ;
U.S. Cl.
CPC ...
523415 ; 523404 ; 525453 ; 525454 ;
Abstract
A diglycidyl ether epoxy resin is reacted with a blocked prepolymer having a soft segment and an asymmetric bisurethane having a first urethane group with a lower alkanol and a second urethane group with a monohydroxyl compound capable of enhancing thermoflowability. The product is then reacted with a cationic active hydrogen compound such as amines to open the remaining epoxy rings. The modified epoxy resin thus produced is dispersed in an aqueous medium containing a neutralizing agent together with a blocked polyisocyanate crosslinker to give a cathodic electrodeposition paint having improved impact strength and thermoflowability.