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:
May. 08, 2018
Filed:
Apr. 23, 2013
Applicant:
Akron Polymer Systems, Inc., Akron, OH (US);
Inventors:
Limin Sun, Copley, OH (US);
Dong Zhang, Uniontown, OH (US);
Frank W. Harris, Boca Raton, FL (US);
Jiaokai Jing, Uniontown, OH (US);
Assignee:
Akron Polymer Systems, Inc., Akron, OH (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 27/08 (2006.01); C08G 69/32 (2006.01);
U.S. Cl.
CPC ...
C08G 69/32 (2013.01);
Abstract
Solvent resistant, transparent films prepared from solutions of aromatic polyamides and multi-functional carboxylic acids in polar aprotic solvents are described herein. Solvent resistance is achieved by heating the films for a short time above 300° C. near the polyamide Tg. The films have CTEs less than 40 ppm/° C. and are optically clear displaying transmittance above 75% between 400 and 750 nm. The films are useful as substrates for flexible electronic devices.