Zhejiang University

Zhejiang Nhu Company Ltd.

Zhejiang Nhu Special Materials Co., Ltd.

Changze Wang

Zhirong Chen

Hong Yin

Guiyang Zhou

Hangjun Deng

Xiaoxiao Wu

Wengang Hong

Qin Zhang

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.

Production method of semi-aromatic polyamide, and semi-aromatic polyamide

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Shaoxing, China

Changze Wang