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:
Oct. 14, 2025
Filed:
Dec. 31, 2021
Cathay Biotech Inc., Shanghai, CN;
Cibt America Inc., Newark, DE (US);
Shanxi Synthetic Biology Institute Co., Ltd., Taiyuan, CN;
Cathay Biotech Inc., Shanghai, CN;
CIBT America Inc., Newark, DE (US);
Shanxi Synthetic Biology Institute Co., Ltd., Taiyuan, CN;
Abstract
The present invention provides a process for producing a high temperature resistant polyamide, the high temperature resistant polyamide and the use thereof. The process comprises: optionally concentrating a polyamide salt solution, and then conducting the following operations: heating and pressurizing to a pressure of P1, and maintaining the pressure, wherein the temperature of the system is T1 at the end of the pressure-maintenance; depressurizing to a pressure of P2, wherein the temperature of the system is T2 at the end of the depressurization; and evacuating, whereby a polyamide melt is obtained; wherein P1 is 0.8-4 MPa, T1 is 250-290° C., T1<T2 and (T2−T1)/(P1−P2)=5-75. The process for producing a high temperature resistant polyamide according to the present invention is simple to operate and reduces energy consumption. The obtained high temperature resistant polyamide may be used as a raw material for such injection molded parts, molded articles, or fibers as high temperature resistant attachments for machines, automobiles, household appliances, toys, textiles, sporting goods, mobile phones, computers, laptops, GPS devices, or optical devices.