US 12,240,947 B2
Flame-retardant semi-aromatic polyamide and preparation method thereof
Xianbo Huang, Guangdong (CN); Huan Chang, Guangdong (CN); Nanbiao Ye, Guangdong (CN); Min Cao, Guangdong (CN); Chuanhui Zhang, Guangdong (CN); Kun Yan, Guangdong (CN); and Zhongquan Peng, Guangdong (CN)
Assigned to KINGFA SCI. & TECH. CO., LTD., Guangdong (CN)
Appl. No. 17/609,410
Filed by KINGFA SCI. & TECH. CO., LTD., Guangdong (CN)
PCT Filed Apr. 10, 2020, PCT No. PCT/CN2020/084265
§ 371(c)(1), (2) Date Nov. 8, 2021,
PCT Pub. No. WO2020/224378, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. 201910383949.7 (CN), filed on May 9, 2019.
Prior Publication US 2022/0227935 A1, Jul. 21, 2022
Int. Cl. C08G 69/42 (2006.01); C08G 79/04 (2006.01); C08G 63/692 (2006.01)
CPC C08G 69/42 (2013.01) [C08G 79/04 (2013.01); C08G 63/692 (2013.01)] 8 Claims
 
1. A flame-retardant semi-aromatic polyamide, wherein the flame-retardant semi-aromatic polyamide is derived from the following monomers:
a diacid monomer A including a diacid monomer A1 and a diacid monomer A2, wherein the diacid monomer A1 is terephthalic acid or terephthalic acid and other diacid, terephthalic acid accounts for 50 to 100 mol % of the diacid monomer A1, and the diacid monomer A2 is [(6-oxido-6H-dibenzo-(c,e) (1,2)-oxaphosphorin-6-ketone)-methyl]-butanedioic acid, a total content of the diacid monomer A1 and the diacid monomer A2 is 100 mol %, a content of the diacid monomer A1 is 90 to 99 mol %, and a content of the diacid monomer A2 is 1 to 10 mol %; and
a diamine monomer B including one or more of diamine monomers containing 4 to 36 carbon atoms.