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. 06, 2014
Filed:
Jul. 27, 2012
Kiu-seung Lee, Midlothian, VA (US);
Kiu-Seung Lee, Midlothian, VA (US);
E I du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The invention concerns processes for forming a polymer comprising residues of 2-(4-amino phenyl)-5(6) amino benzimidazole (DAPBI), paraphenylene diamine (PPD), and terephthaloyl dichloride, comprising the steps of: (a) forming a slurry of DAPBI in a solvent system comprising an organic solvent and an inorganic salt; (b) adding terephthaloyl dichloride to the slurry terephthaloyl dichloride in the amount of up to one-half mole for every mole of DAPBI in the slurry; (c) agitating the slurry to react the DAPBI and terephthaloyl dichloride to form an oligomeric solution; (d) adding PPD to the oligomeric solution and agitating until substantially all of the PPD is dissolved, (e) adding terephthaloyl dichloride in an amount of greater than one mole for every mole of PPD in the solution to form a prepolymer solution; and (e) agitating the prepolymer solution to form a polymer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile