Patent ID: 8053491

Claim:
A resin composition comprising a biodegradable 3-hydroxyalkanoate copolymer (A) and a plasticizer (B), wherein: the biodegradable 3-hydroxyalkanoate copolymer (A) has a recurring unit represented by the structure formula (1): [—CHR—CH 2 —CO—O—] (wherein, R represents an alkyl group represented by C n H 2n+1 ; and n is an integer of 1 to 15) and the copolymer (A) is constituted with poly[3-hydroxybutyrate-co-3-hydroxyhexanoate] having a recurring unit of 3-hydroxybutyrate and a recurring unit of 3-hydroxyhexanoate as a principal component; the plasticizer (B) is constituted with 100 to 50% by weight of a polyglycerol acetic acid ester having an acetylation degree of no less than 50%, and 0 to 50% by weight of a monoglycerol ester; and the resin composition comprises 0.1 to 50 parts by weight of the plasticizer (B) based on 100 parts by weight of the copolymer (A).