Patent ID: 8288463

Claim:
A polylactic acid based resin (A) comprising a weight average molecular weight (Mw) of 5,000 to 1,000,000 and a moiety represented by the following formula (1): wherein E represents a polymer residue, which is formed from an ethylene homopolymer, a copolymer of ethylene and an Î±-olefin having the carbon number of 3 to 20, or a homopolymer of an Î±-olefin having the carbon number of 3 to 20 and which has a weight average molecular weight (Mw) of 400 to 20,000, Z represents a H atom, an alkyl group, or an aralkyl group, X 1 represents an O atom or a S atom, and R 1 represents a single bond or a group represented by the following formula (2): â€”R 4 â€”X 2 â€”â€ƒâ€ƒ(2) wherein R 4 represents a divalent hydrocarbon group or a polyoxyalkylene group and X 2 represents an O atom, a S atom, or an NH group; or the following formula (1â€²): wherein E represents a polymer residue, which is formed from an ethylene homopolymer, a copolymer of ethylene and an Î±-olefin having the carbon number of 3 to 20, or a homopolymer of an Î±-olefin having the carbon number of 3 to 20 and which has a weight average molecular weight (Mw) of 400 to 20,000, Z represents a H atom, an alkyl group, or an aralkyl group, and R 2 and R 3 represent independently a single bond or a group represented by the above formula (2).