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. 24, 2020
Filed:
Jun. 29, 2017
Zhejiang Nhu Special Materials Co., Ltd., Shaoxing, CN;
Zhejiang University, Hangzhou, CN;
Zhejiang Nhu Company Ltd., Shaoxing, CN;
Zhirong Chen, Hangzhou, CN;
Hong Yin, Hangzhou, CN;
Qin Zhang, Shaoxing, CN;
Xiaoxiao Wu, Shaoxing, CN;
Wengang Hong, Shaoxing, CN;
Hangjun Deng, Shaoxing, CN;
Guiyang Zhou, Shaoxing, CN;
Changze Wang, Shaoxing, CN;
Zhejiang Nhu Special Materials Co., Ltd., Zhejiang, CN;
Zhejiang University, Zhejiang, CN;
Zhejiang Nhu Company Ltd., Shaoxing, CN;
Abstract
The present disclosure provides a production method of a semi-aromatic polyamide, and a semi-aromatic polyamide. Said production method of a semi-aromatic polyamide includes: step 1 of subjecting an initial charge of a diamine and a binary acid in an amine/acid molar ratio of less than 1.0 to form a slurry together with water and a catalyst, and subjecting the slurry to heating and dissolution to form a saline solution; step 2 of dehydrating said saline solution after detecting the composition thereof, detecting the content of diamine in a steam condensate from a dehydration unit, adjusting the amine/acid molar ratio to be larger than 1.0 by a molten diamine and a monoacid as a molecular weight regulator, and performing pre-polymerization; and step 3 of subjecting a pre-polymerization solution to post-polycondensation after vacuum flashing. The semi-aromatic polyamide of the present disclosure has a low gel content, excellent performance and extensive scope of application.