Patent ID: 7781539

Claim:
A blend comprising a first PHA and a second PHA, wherein: the first PHA is a copolymer consisting of a comonomer I-A and a comonomer I-B; the second PHA is a copolymer consisting of a comonomer 2-A and a comonomer 2-B; the first PHA copolymer and the second PHA copolymer are the same copolymer, in which the ratio of comonomer 1-A:comonomer I-B in the first PHA is different from the ratio of comonomer 2-A:comonomer 2-B in the second PHA; comonomer I-A and comonomer 2-A are both 3-hydroxybutyrate; and the first PHA and the second PHA are miscible.