公开(公告)号：US11718045B2

公开(公告)日：2023-08-08

申请号：US17088033

申请日：2020-11-03

Applicant: Arkema France

Inventor： Gregory Filou ,  Cyrille Mathieu ,  Holger Senff

IPC: C08G69/26 ,  B29C67/04 ,  C08G69/04 ,  C08G69/08 ,  C08G69/16 ,  C08G69/28 ,  C08G69/44 ,  C08J3/12 ,  C08J3/28 ,  B29C64/153 ,  C08J3/14 ,  B29K77/00

CPC classification number: B29C67/04 ,  B29C64/153 ,  C08G69/04 ,  C08G69/08 ,  C08G69/16 ,  C08G69/26 ,  C08G69/28 ,  C08G69/44 ,  C08J3/12 ,  C08J3/14 ,  C08J3/28 ,  B29K2077/00

Abstract: A method for reducing the crystallization temperature and the melting temperature of a polyamide powder resulting from the polymerization of at least one predominant monomer, in which the reduction in the crystallization temperature is greater than the reduction in the melting temperature, the method including a step of polymerization of the at least one predominant monomer with at least one different minor comonomer polymerized according to the same polymerization process as the at least one predominant monomer, the at least one minor comonomer being chosen from aminocarboxylic acids, diamine/diacid pairs, lactams and/or lactones, and the at least one minor comonomer representing from 0.1% to 20% by weight of the total blend of the monomers(s) and comonomer(s), preferably from 0.5% to 15% by weight of the total blend, preferably from 1% to 10% by weight of the total blend.