Toughened poly(lactic acid) compositions

Details Toughened poly(lactic acid) compositions Toughened poly(lactic acid) compositions

2008-04-08

2008-04-08

Gulakowski, Randy (Department: 1796)

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

Synthetic resins

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

C525S166000, C525S191000, C525S176000, C525S417000, C525S419000

Reexamination Certificate

active

10996899

ABSTRACT:
Toughened poly(lactic acid) resin compositions comprising poly(lactic acid) and an impact modifier comprising an ethylene copolymer made from monomers (a) ethylene; (b) one or more olefins of the formula CH2═C(R1)CO2R2, where R1is hydrogen or an alkyl group with 2-8 carbon atoms and R2is an alkyl group with 1-8 carbon atoms, such as methyl, ethyl, or butyl; and (c) one or more olefins of the formula CH2═C(R3)CO2R4, where R3is hydrogen or an alkyl group with 1-6 carbon atoms, such as methyl, and R4is glycidyl. The ethylene copolymer may further be made from carbon monoxide monomers. The compositions may further comprise one or more ethylene/acrylate and/or ethylene/vinyl ester polymers, ionomers, and cationic grafting agents.

REFERENCES:
patent: 4912167 (1990-03-01), Deyrup et al.
patent: 5252642 (1993-10-01), Sinclair et al.
patent: 6943214 (2005-09-01), Flexman
patent: 9-316310/97 (1997-12-01), None
patent: WO 00/23520 (2000-04-01), None
patent: WO 03/014224(A1) (2003-02-01), None
patent: WO 03/082980(A1) (2003-10-01), None
patent: WO 2004/191642(A1) (2004-11-01), None
International Search Report, for PCT/US2004/041695, International Filing Date Aug. 12, 2004.

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