Search International and National Patent Collections

1. (WO2017152774) BIODEGRADABLE POLYESTER COMPOSITION

Pub. No.:    WO/2017/152774    International Application No.:    PCT/CN2017/074676
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Feb 25 00:59:59 CET 2017
IPC: C08L 67/02
C08L 67/04
C08L 3/02
C08K 13/02
C08K 5/156
C08K 5/07
Applicants: KINGFA SCI. & TECH. CO., LTD.
金发科技股份有限公司
Inventors: LU, Changli
卢昌利
YUAN, Zhimin
袁志敏
CAI, Tongmin
蔡彤旻
HUANG, Xianbo
黄险波
ZENG, Xiangbin
曾祥斌
JIAO, Jian
焦健
YUAN, Renxu
苑仁旭
ZHONG, Yuke
钟宇科
XIONG, Kai
熊凯
YANG, Hui
杨晖
MAI, Kaijin
麦开锦
DONG, Xueteng
董学腾
Title: BIODEGRADABLE POLYESTER COMPOSITION
Abstract:
Disclosed is a biodegradable polyester composition, where the weight content of a cyclic ester as structurally represented by formula (I) is 100 ppm to 950 ppm based on the total weight of the biodegradable polyester composition, and the weight content of cyclopentanone is 0.5 ppm to 85 ppm based on the total weight of the biodegradable polyester composition. The present invention, by adding the cyclic ester and the coclypentanone to the composition, controls the content of the ester and that of the cyclopentanone in the composition within a certain range, thus increasing the thermal-oxidative aging resistance of the biodegradable polyester composition; also, a film produced by blow molding or a workpiece produced by injection molding produces a small amount of surface precipitates after being boiled in 95% ethanol at 40 °C for 240 h, has great surface appearance properties, and improves the degree of lubrication for the film during the blow molding process of the biodegradable polyester composition, when the rate of film blowing is at 176 kg/h, the range of the thickness of the film is < 0.2 μm, and the relative deviation in the thickness of the film is < 1%, thus ensuring the stability of film bubbles and the continuity of film blowing.