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:
Jun. 14, 2016
Filed:
Jan. 13, 2012
Warren Francis Knoff, Richmond, VA (US);
Christopher William Newton, Richmond, VA (US);
Warren Francis Knoff, Richmond, VA (US);
Christopher William Newton, Richmond, VA (US);
E I DU PONT DE NEMOURS AND COMPANY, Wilmington, DE (US);
Abstract
The present invention concerns yarns comprising copolymer derived from the copolymerization of para-phenylenediamine, 5(6)-amino-2-(p-aminophenyl)benzimidazole; and terephthaloyl dichloride wherein the ratio of moles of 5(6)-amino-2-(p-aminophenyl)benzimidazole to the moles of para-phenylenediamine is 30/70 to 85/15. The yarns have a sulfur content greater than 0.1%; and have an effective polymer cation to sulfur content molar ratio of at least 0.3. Additional aspects of the invention concern methods of producing such yarns.