US 12,404,365 B2
High strength ultra-thin biodegradable film and preparation method thereof
Guixiang Zhu, Beijing (CN); Taoyi Zhang, Beijing (CN); Mingfu Lyu, Beijing (CN); Cui Zheng, Beijing (CN); Wei Zhang, Beijing (CN); Ling Han, Beijing (CN); Wenxi Ji, Beijing (CN); Ning Xu, Beijing (CN); and Peng Guo, Beijing (CN)
Assigned to CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN)
Appl. No. 17/753,672
Filed by CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN)
PCT Filed Sep. 17, 2020, PCT No. PCT/CN2020/115783
§ 371(c)(1), (2) Date Mar. 10, 2022,
PCT Pub. No. WO2021/052397, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 201910878788.9 (CN), filed on Sep. 17, 2019.
Prior Publication US 2022/0332888 A1, Oct. 20, 2022
Int. Cl. C08G 63/183 (2006.01); C08J 5/18 (2006.01); C08K 13/02 (2006.01); C08L 67/02 (2006.01)
CPC C08G 63/183 (2013.01) [C08J 5/18 (2013.01); C08K 13/02 (2013.01); C08L 67/02 (2013.01); C08J 2367/02 (2013.01)] 47 Claims
 
1. A biodegradable film, which is prepared from a composition comprising: a copolyester obtained by extrusion reaction of a branched aliphatic-aromatic copolyester derived from monomer a, monomer b, monomer c and monomer d with an organic peroxide, wherein:
the monomer a is an aromatic dibasic acid or an ester derivative thereof;
the monomer b is one or more of C2-C10 aliphatic dihydric alcohols or C3-C10 alicyclic dihydric alcohols;
the monomer c is a C4-C20 aliphatic dibasic acid or an ester derivative thereof;
the monomer d is one or more selected from the group consisting of polyols with a functionality of more than 2, polycarboxylic acids with a functionality of more than 2, anhydrides with a functionality of more than 2, epoxy compounds or anhydrides with hydroxyl or carboxyl group, glycidyl ester, glycidyl ether, glycidol, lactones, and cyclic carbonates with hydroxyl or carboxyl side group;
the branched aliphatic-aromatic copolyester is obtained by reacting the monomer a, the monomer b, the monomer c and the monomer d in the presence of a catalyst system containing a second catalyst,
wherein the second catalyst is a compound of RE(R3)3, wherein RE is a rare earth metal element, R3 is at least one selected from the group consisting of halogen, alkoxy group, aryloxy group, acetylacetone group, and R4COO— group, and R4 is C1-C30 alkyl group.