Polyactic acid-based blends

Details Polyactic acid-based blends Polyactic acid-based blends

1997-04-03

1999-03-16

Nutter, Nathan M.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525450, 604212, 604370, 604403, 604408, 428 352, 428 357, 428 3692, C08F 2000, B29D 2200

Patent

active

058831991

ABSTRACT:
Biodegradable blends including a first, polylactic acid-based polymer or copolymer, and a second polymer or copolymer including one or more polyesters, e.g., an aliphatic polyester or a polyester of one aliphatic C.sub.2 to C.sub.20 diacid or of a combination of two more different aliphatic C.sub.2 to C.sub.20 diacids, wherein the first and second polymers are present in a ratio of 9:1 to 1:9, are described.

REFERENCES:
patent: 4095600 (1978-06-01), Casey et al.
patent: 5216050 (1993-06-01), Sinclair
patent: 5252642 (1993-10-01), Sinclair et al.
patent: 5685540 (1997-11-01), Kakizawa
Cai et al., "Effects of Physical Aging, Crystallinity, and Orientation on the Enzymatic Degradation of Poly(Lactic acid)", J. Polymer Science, 34:2701-2708 (1996).
Gajria et al., "Miscibility and biodegradability of blends of poly(lactic acid) and poly(vinyl acetate)", Polymer, 37:437-444 (1996).
Sheth et al., "Biodegradable Polymer Blends of Polylactic Acid (PLA) and Polyethylene Glycol (PEG)", ANTEC '95, 1829-1833 (1995).
Younes et al., Phase Separation in Poly(Ethylene Glycol)/Poly(Lactic Acid) Blends, Polym. J., 24(8):765-773 (1988).

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