| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin composition which comprises a poly-3-hydroxybutyrate-based polymer and/or polylactic acid and a polyurethane and has a large rate of crystallization and excellent impact resistance, to provide a method for producing the resin composition, and to provide an injection molded article. SOLUTION: This resin composition is characterized by comprising 1 to 99 wt. % of the poly-3-hydroxybutyrate-based polymer and/or the polylactic acid and 99 to 1 wt. % of the polyurethane and preferably satisfying the following characteristics (a) and (b). (a) The crystal-melting point observed with a differential scanning calorimeter, when heated from room temperature at a temperature-rising rate of 10°C / min, is 130 to 185°C. (b) The weight-average mol. wt. converted into polystyrene and measured by gel permeation chromatography is 20,000 to 3,000,000. COPYRIGHT: (C)2005,JPO&NCIPI
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