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:
Nov. 18, 1997
Filed:
Jul. 29, 1996
Applicant:
Inventor:
Darrell Joe Parish, Circleville, OH (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
523216 ; 252518 ; 428404 ;
Abstract
An antistatic aromatic polyimide film containing from 14 to 50% by weight of electrically conductive silica particles coated with a layer of antimony-containing tin oxide and having a surface resistivity ranging from 10.sup.4 to 10.sup.12 ohms/square. The polyimide film exhibits excellent antistatic properties even after heat-treatment at high temperatures of 400.degree. C. or above, while maintaining good heat resistance and mechanical properties. The polyimide film can be used in various applications requiring good antistatic properties such as copier belts, space blankets and flexible circuit substrates.