US 11,053,385 B2
Polyester composition and preparation method therefor
Cui Zheng, Beijing (CN); Guixiang Zhu, Beijing (CN); Lizhi Liu, Beijing (CN); and Wei Zhang, Beijing (CN)
Assigned to CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and Beijing Research Institute of Chemical Industry, China Petrolium & Chemical Corporation, Beijing (CN)
Appl. No. 16/343,704
Filed by CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation, Beijing (CN)
PCT Filed Oct. 20, 2017, PCT No. PCT/CN2017/107108
§ 371(c)(1), (2) Date Apr. 19, 2019,
PCT Pub. No. WO2018/072747, PCT Pub. Date Apr. 26, 2018.
Claims priority of application No. 201610922017.1 (CN), filed on Oct. 21, 2016.
Prior Publication US 2019/0264022 A1, Aug. 29, 2019
Int. Cl. C08L 67/02 (2006.01); B29C 48/92 (2019.01); B29C 48/40 (2019.01); C08G 63/80 (2006.01); C08K 3/26 (2006.01); C08K 5/00 (2006.01); C08K 5/053 (2006.01); C08L 23/06 (2006.01); C08L 77/00 (2006.01); B29K 67/00 (2006.01); C08G 63/183 (2006.01)
CPC C08L 67/02 (2013.01) [B29C 48/40 (2019.02); B29C 48/92 (2019.02); C08G 63/80 (2013.01); C08K 3/26 (2013.01); C08K 5/0083 (2013.01); C08K 5/053 (2013.01); C08L 23/06 (2013.01); C08L 77/00 (2013.01); B29K 2067/006 (2013.01); C08G 63/183 (2013.01); C08K 2003/265 (2013.01); C08L 2205/24 (2013.01)] 18 Claims
 
1. A polyester composition, comprising:
(1) from 50 to 99% by weight of polybutylene terephthalate homopolymer; and
(2) from 1 to 50% by weight of an aliphatic-aromatic copolyester, wherein the aliphatic-aromatic copolyester is a copolymer comprising a repeating unit A represented by formula (I) and a repeating unit B represented by formula (II),

OG Complex Work Unit Chemistry
wherein, based on the total moles of the repeating unit A and the repeating unit B in the aliphatic-aromatic copolyester, the content of the repeating unit A is from 20 to 40 mol %, and the content of the repeating unit B is from 60 to 80 mol %,
wherein, in formula (I) and/or formula (II), m is an integer of 2 to 10, n is an integer of 2 to 8, p is an integer of 2 to 10, and m, n and p are the same or different;
wherein the percentage by weight is calculated based on the total weight of the polybutylene terephthalate homopolymer and the aliphatic-aromatic copolyester.