PREPARATION METHOD OF MODIFIED STARCH-GRAFTED POLYLACTIC ACID OLIGOMER THERMOPLASTIC COMPOSITE MATERIAL AND USE THEREOF

WIPO Patent Application WO/2022/032514

A1

A preparation method of a modified starch-grafted polylactic acid oligomer thermoplastic composite material. The preparation method involves: (1) adding 100 parts of modified starch, 50-100 parts of a polylactic acid oligomer reactant, 8-15 parts of glycidyl methacrylate, 1-3 parts of citric acid and 0.5-5 parts of an initiator into water, stirring same uniformly, and then carrying out ultrasonic dispersion to form an emulsion; heating the emulsion to 70-90ºC, and continuing to stir for reaction for 5-12 h; and (2) demulsifying the emulsion of step (1), and then drying same to prepare the modified starch-grafted polylactic acid oligomer thermoplastic composite material. A film prepared from the modified starch-grafted polylactic acid oligomer thermoplastic composite material has a good transparency and ductility and a strong machinability, will easily degrade under natural conditions and is low in cost, and can be widely applied to packaging materials.

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CHEN CHANGPING (CN)

PCT/CN2020/108626

February 17, 2022

August 12, 2020

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NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INSTITUTE CO LTD (CN)

C08F220/32; C08L3/02; C08G63/66; C08J5/18; C08K5/1515; C08L67/04

WO2010138081A1

2010-12-02

CN108948690A	2018-12-07
CN110437392A	2019-11-12
CN101353420A	2009-01-28
CN103881338A	2014-06-25
CN108676201A	2018-10-19
KR20100108683A	2010-10-08

JIANGSU PHAEDO LAW FIRM et al. (CN)

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