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:
Dec. 27, 1977
Filed:
Oct. 22, 1976
Applicant:
Inventors:
Donald J Progar, Grafton, VA (US);
Vernon L Bell, Seaford, VA (US);
Terry L St Clair, Poquoson, VA (US);
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08L / ; C09J / ; C09J / ;
U.S. Cl.
CPC ...
156309 ; 156331 ; 260 / ; 260 / ; 260 / ; 260 / ;
Abstract
A process of preparing aromatic polyamide-acids for use as adhesives by reacting an aromatic dianhydride to an approximately equimolar amount of an aromatic diamine in a water or lower alkanol miscible ether solvent and wherein the polyamide-acids are converted to polyimides by heating to the temperature range of 200.degree. - 300.degree. C. and wherein the polyimides are thermally stable and insoluble in ethers and other organic solvents.