| abstract |
PROBLEM TO BE SOLVED: To provide a poly3-hydroxybutyrate polymer and / or a resin composition comprising polylactic acid and polyurethane having a high crystallization speed and excellent impact resistance, a method for producing the resin composition, and an injection molded article. . A poly 3-hydroxybutyrate polymer and / or polylactic acid is 1 to 99% by weight and polyurethane is 99 to 1% by weight, and preferably satisfies the following characteristics (a) and (b). Resin composition. (A) The crystalline melting point observed when heated at a heating rate of 10 ° C./min from room temperature with a differential scanning calorimeter 130-185 ° C. (b) Polystyrene conversion measured by gel permeation chromatography The weight average molecular weight (Mw) of 20,000 to 3,000,000 is not selected. |