Method for producing polylactic acid

Details Method for producing polylactic acid Method for producing polylactic acid

1995-01-20

1996-04-16

Dodson, Shelley A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

525408, 525415, 525450, 528357, 528361, C08G 6308

Patent

active

055083781

ABSTRACT:
A method for producing a polylactic acid of the present invention includes the steps of (a) polymerizing a lactide used as a main starting material in a molten state to give a polylactic acid; and (b) further polymerizing the polylactic acid obtained in step (a) in a solid phase by heating at a temperature lower than a melting point of a final polymer product.

REFERENCES:
patent: 4300565 (1981-11-01), Rosensaff et al.
patent: 5010145 (1991-04-01), Ikada et al.
patent: 5041529 (1991-08-01), Shiwoda et al.
patent: 5278256 (1994-01-01), Bellis
patent: 5357034 (1994-10-01), Fridman et al.

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