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:
Jul. 06, 1982
Filed:
Aug. 06, 1981
Applicant:
Inventors:
Hidetaka Sato, Hitachi, JP;
Shunichiro Uchimura, Hitachi, JP;
Hiroshi Suzuki, Hitachi, JP;
Daisuke Makino, Hitachi, JP;
Assignee:
Hitachi Chemical Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 26 ; 528 21 ; 528 23 ; 528 28 ; 528 38 ; 556419 ; 556423 ;
Abstract
A polyimide-isoindroquinazolinedione-silicone copolymer resin produced by reacting (a) a diaminoamide, (b) a diaminosiloxane, (c) a diamine, and (d) a tetracarboxylic acid dianhydride to give a polyamide acid-silicone intermediate, which is then subjected to dehydration and ring closure, is excellent particularly in adhesiveness, moisture resistance, wear resistance and heat resistance. The polyamide acid-silicone intermediate is stable in the form of a varnish and usuable commercially as a raw material for the polyimide-isoindroquinazolinedione-silicone copolymer resin.