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:
Feb. 23, 1999
Filed:
Jul. 15, 1994
Applicant:
Inventors:
Assignee:
Hitachi Chemical Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528310 ; 528 49 ; 528 59 ; 528272 ; 528274 ; 528296 ; 528322 ; 528332 ; 528335 ; 528336 ; 525418 ; 525419 ; 525423 ;
Abstract
An epoxy-modified polyamide resin obtained by reacting a diisocyanate(A) with at least one member selected from the group consisting of a dicarboxylic acid and a tricarboxylic acid anhydride (B) in a nitrogen-containing aprotic solvent to form a polyamide resin intermediate and reacting this polyamide resin intermediate with an epoxy resin (C) in the nitrogen-containing aprotic solvent. This epoxy-modified polyamide resin has a high molecular weight and can provide a film with excellent heat resistance and flexibility, and its composition can be used as a coating material, adhesive or such in the form as it is.