公开(公告)号：EP3660095A1

公开(公告)日：2020-06-03

申请号：EP19810046.3

申请日：2019-05-24

申请人： Kingfa Sci. & Tech. Co., Ltd.

发明人： OUYANG, Chunping ,  JIAO, Jian ,  MAI, Kaijin ,  DONG, Xueteng ,  YANG, Hui ,  QU, Weida ,  XIONG, Kai ,  LU, Changli ,  ZENG, Xiangbin ,  CAI, Tongmin ,  HUANG, Xianbo

IPC分类号： C08L67/02 ,  C08L3/02 ,  C08K5/053 ,  C08K3/20 ,  C08K3/34 ,  C08K3/26

摘要： Disclosed is a biodegradable polyester composition, comprising the following components in percentage by weight: i) 58-80 parts of aliphatic-aromatic copolyester; ii) 20-32 parts of starch; and iii) 0-10 parts of processing assistant agents. According to the present invention, it can be unexpectedly found during studies that the aliphatic-aromatic copolyester in which the aromatic carboxylic acid is 44 mol%-48 mol% as the total amount of diacid is used as a base resin, the crystalline peak width D of the aliphatic-aromatic copolyester is 5°C-6°C, and the starch having the particle size D(50) of 2 µm-12 µm is used as another phase; meanwhile, a processing assistant agent having the particular content is added, the polyester composition obtained by preparing has excellent transverse and longitudinal tear strength, meets industrial compost, and has more than 90% of biodegradation rate in a 12-week degradation test process.