Patent ID: 7595363

Claim:
A poly(hydroxyalkanoic acid) composition comprising: (i) about 60 to about 99.8 weight % poly(hydroxyalkanoic acid), and (ii) about 0.5 to about 40 weight % of an impact modifier comprising an ethylene copolymer derived from copolymerizing (a) about 20 to about 95 weight % ethylene; (b) about 3 to about 70 weight % of one or more olefins of the formula CH 2 ═C(R 1 )CO 2 R 2 , where R 1 is hydrogen or an alkyl group with 1 to 8 carbon atoms and R 2 is an alkyl group with 1 to 8 carbon atoms; and (c) about 0.5 to about 25 weight % of one or more olefins of the formula CH 2 ═C(R 3 )CO 2 R 4 , where R 3 is hydrogen or an alkyl group with 1-6 carbon atoms, and R 4 is glycidyl; wherein the weight % of the poly(hydroxyalkanoic) and the impact modifier are based on the total weight of the poly(hydroxyalkanoic acid) and the impact modifier.