PLA MODIFYING METHOD USING SACCHARIDE OR CARBOXYLIC GROUP SUBSTITUENT OF SACCHARIDE, AND PLA MODIFIED THEREBY

Title:

PLA MODIFYING METHOD USING SACCHARIDE OR CARBOXYLIC GROUP SUBSTITUENT OF SACCHARIDE, AND PLA MODIFIED THEREBY

Document Type and Number:

WIPO Patent Application WO/2023/027394

Kind Code:

A1

Abstract:

The present invention relates to a PLA modifying method using a saccharide or a carboxylic group substituent of a saccharide, and a PLA modified thereby. More particularly, the present invention relates to a PLA modifying method using a saccharide or a carboxylic group substituent of a saccharide, and a PLA modified thereby, the method in which a saccharide or a carboxylic group substituent of a saccharide is added and mixed into a high molecular weight polylactic acid (PLA) polymer and then heat-melted to simultaneously or sequentially give rise to hydrolysis and branching generation reaction, thereby increasing melt strength (MS) and modifying into a low molecular weight PLA of a branched polymer which is much finer than an existing linear PLA, to realize ultra-fine and ultra-thin properties. According to the present invention, by overcoming the limitation of an existing invention, an original process is used as is without a separate auxiliary apparatus required for enhancing the performance of a material, to enhance performance while maintaining the original cost, and manufacture a product having excellent market competitiveness with greater application range of films or fibers by manufacturing ultra-fine products.

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Inventors:

AHN HONG TAE (KR)
KIM SANG HEON (KR)

Application Number:

PCT/KR2022/011993

Publication Date:

March 02, 2023

Filing Date:

August 11, 2022

Export Citation:

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Assignee:

CORESHTECH CO LTD (KR)

International Classes:

C08G63/91; C08G63/08

Domestic Patent References:

WO2015112098A1

2015-07-30

Foreign References:

KR20090031801A	2009-03-30
KR101360777B1	2014-02-11
KR20140037628A	2014-03-27

Other References:

BOROWICZ MARCIN, PACIOREK-SADOWSKA JOANNA, ISBRANDT MAREK, GRZYBOWSKI ŁUKASZ, CZUPRYŃSKI BOGUSŁAW: "Glycerolysis of Poly(lactic acid) as a Way to Extend the “Life Cycle” of This Material", POLYMERS, vol. 11, no. 12, pages 1963, XP093039479, DOI: 10.3390/polym11121963

Attorney, Agent or Firm:

JU, Dae Weon (KR)

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