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:
Mar. 29, 1977
Filed:
Feb. 04, 1975
Applicant:
Inventor:
Thomas Patrick Concannon, Newtown Square, PA (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08L / ;
U.S. Cl.
CPC ...
260 / ; 2608 / ;
Abstract
High solids, low viscosity, stable aqueous solutions of polyamide acids, which are precursors of polyimide polymers, can be prepared from the polyamide acids, a tertiary amine, a coalescing agent such as N-methylpyrrolidone, and a viscosity reducing agent such as furfuryl alcohol. These aqueous solutions are capable of depositing a uniform film and of being cured into polyimides.