METHOD FOR PREPARING POLYLACTIC ACID

EPO Patent Application EP 3336/128 A1
Application Date: Jun. 20th, 2018

ABSTRACT

The present invention relates to a method for preparing polylactic acid. According to the method for preparing polylactic acid, high quality polylactic acid can be provided by effectively removing residual...
Assignee(s):
Inventor(s):
KIM, Hyun A
KO, Myung Joo
KANG, Jong Won
Application Number:
16835439.7
International Classification:
C08G 63/08 (20060101); C08G 63/90 (20060101); C08L 67/04 (20060101)
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CLAIMS

What is claimed is:

A method for preparing polylactic acid, comprising: a polymerization step wherein lactides or lactic acids are polymerized, and sterically hindered phenol is added when residual monomers are 1 to 8 mol% of the total monomers introduced and additionally reacted to obtain a polymer;a cooling step wherein pellets are obtained from the...

DESCRIPTION

[TECHNICAL FIELD]

The present invention relates to a method for preparing polylactic acid.
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