POLYLACTIC ACID COMPOSITE MATERIAL AND APPLICATION THEREOF

WIPO Patent Application WO/2019/080524

A1

Disclosed in the present invention are a polylactic acid composite material and an application thereof. The material comprises components of: i) 50-85 parts by weight of polylactic acid; ii) 8-35 parts by weight of an inorganic filler; and iii) 0-8 parts by weight of a plasticizer, wherein the content of a terminal carboxyl group in the polylactic acid composite material is 12-51 molKOH/t. According to the present invention, it is unexpectedly found during studies that the ratio of the mass melt flow index MFIt=30 to the initial mass melt flow index MFIt=0 meets the relation: 3.5 <η = MFIt=30/MFIt=0 < 5.1 after the polylactic acid composite material is tested at the temperature of 60°C under the humidity of 60% for 30 days when the content of the terminal carboxyl group of the polylactic acid composite material is controlled to range from 12 molKOH/t to 51 molKOH/t, proving that the product is slow in aging degradation under the testing conditions, and the polylactic acid composite material has a biodegradation rate higher than 90% after 12 weeks under the condition that the thickness is smaller than or equal to 2.5 mm. The polylactic acid composite material has proper aging performance and excellent biodegradation performance.

WO/2010/097557	COMPOSITION COMPRISING POLYESTER ELASTOMER MATRIX FOR POWER AND/OR TELECOMMUNICATION CABLES
JPH0781015	[Title of Invention] A method for producing a molded product of a polymer compound.
JP5157858	Method of manufacturing resin composition and molded product

LU CHANGLI (CN)
YUAN ZHIMIN (CN)
CAI TONGMIN (CN)
HUANG XIANBO (CN)
ZENG XIANGBIN (CN)
JIAO JIAN (CN)
XIONG KAI (CN)
YANG HUI (CN)
MAI KAIJIN (CN)
DONG XUETENG (CN)

PCT/CN2018/092804

May 02, 2019

June 26, 2018

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KINGFA SCIENCE & TECHNOLOGY CO (CN)
ZHUHAI WANGO CHEM CO LTD (CN)
SHANGHAI KINGFA SCI & TECH CO (CN)
TIANJIN KINGFA ADVANCED MAT CO LTD (CN)

C08L67/04; C08G63/08; C08K3/34; C08K5/06; C08K5/098

CN101679733A	2010-03-24
CN107868416A	2018-04-03
CN102838858A	2012-12-26
CN103788357A	2014-05-14
CN102174201A	2011-09-07
US20060019111A1	2006-01-26

See also references of EP 3666826A4

GUANGZHOU WISON I.P. LAW FIRM (CN)

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