Patent ID: 7666934

Claim:
An aliphatic polyester resin composition contains a compound (A) of 1.0 mass part to 100 mass parts expressed by the following formula (1) as a plasticizer to an aliphatic polyester of 100 mass parts, wherein said aliphatic polyester resin is a lactic acid polyester, in the formula, X denotes a trivalent polyalcohol frame; R 1 , R 2 , R 3 are selected from an acyl group having 2 to 18 carbon atoms or a hydrogen atom; and where R 1 , R 2 , R 3 contain at least one acyl group having 8 to 18 carbon atoms, the sum total of carbon numbers of R 1 , R 2 , R 3 is 10 to 22; and the average acylation rate is 55 to 90% to obtain high solvent resistance to a paraffin system solvent.