Appeal No. 94-2616
Application 07/760,180
invention.
The subject matter on appeal relates to a method for
preparing a high modulus electrically conductive fiber consisting
essentially of poly(p-phenylene terephthalamide) and a sulfonic
acid ring-substituted polyaniline comprising the steps of forming
a solution of sulfonated polyaniline and poly(p-phenylene
terephthalamide) wherein the solution contains at least 15 wt. %
of total polymer content and extruding the solution through an
air gap into a coagulating bath to form a fiber. Further details
of this appealed subject matter are readily apparent from a study
of claim 4 which reads as follows:
4. A method for preparing a high modulus electrically
conductive fiber having an as-spun tenacity of at least 10 grams
per denier and consisting essentially of poly(p-phenylene
terephthalamide) and a sulfonic acid ring-substituted polyaniline
comprising
a) forming a solution of sulfonated polyaniline
having a sulfur content of at least 9% by weight and poly(p-
phenylene terephthalamide) in concentrated sulfuric acid, the
ratio of sulfonated polyaniline to poly(p-phenylene
terephthalamide) being from 10/90 to 30/70 on a weight % basis,
and the solution containing at least 15 wt. % of total polymer
content, and
b) extruding the solution through an air gap into
a coagulating bath to form the fiber.
The prior art relied upon by the examiner as evidence of
obviousness is set forth below:
2
Page: Previous 1 2 3 4 5 6 Next
Last modified: November 3, 2007