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. 22, 2022
Filed:
Sep. 26, 2018
Dupont Polymers, Inc., Wilmington, DE (US);
Ahmet Turgut Mutel, Napanee, CA;
Shailesh Ratilal Doshi, Kingston, CA;
DUPONT POLYMERS, INC., Wilmington, DE (US);
Abstract
The present invention relates to a process comprising the step of melt-mixing a semi-aromatic polyamide (A) having a melting point on second heating of 295° C. or less comprising terephthalamide repeat units and a polyamide oligomer (B) comprising terephthalamide repeat units and having an amine end group concentration of less than 2000 me q/Kg and an inherent viscosity of at least 0.10, at a temperature which is greater than the melting point on first heating of both semi-aromatic polyamide (A) and polyamide oligomer (B) for a time period sufficient to produce semi-aromatic polyamide (C) having a melting point on second heating which is greater than or equal to 300° C.