A polylactic acid resin composition in which polylactic acid is blended with dibasic acid bis(benzoylhydrazide) represented by general formula (I) below; and a process for producing heat-resistant polylactic acid resin moldings, wherein after the polylactic acid resin composition is melted, the polylactic acid resin composition melted is filled in a die of a molding machine and molded accompanied with crystallization, in which the temperature of the die has been set in a range not higher than the initiation temperature of crystallization and not lower than the glass transition temperature determined with a differential scanning calorimeter (DSC).
(In the formula, R represents a alkylene, alkenylene, cycloalkylene, alkylene having an ether bond, or alkylene interrupted with a cycloalkylene, the groups each having 1 to 12 carbon atoms; and R1, R2, R3, and R4 each represent a hydrogen atom, halogen atom, alkyl, cycloalkyl, aryl, aralkyl, or alkylaryl, the groups each having 1 to 12 carbon atoms, or R1 and R2 and/or R3 and R4 bond to each other to form a five- to eight-membered ring.)
一种聚
乳酸树脂组合物,其中聚
乳酸与下述通式(I)代表的二盐基酸二(苯甲酰
肼)混合;以及一种生产耐热聚
乳酸树脂模塑件的工艺,其中在熔化聚
乳酸树脂组合物后,将熔化的聚
乳酸树脂组合物填充到模塑机的模具中,并在模塑过程中结晶,其中模具的温度设定在不高于结晶起始温度且不低于用差示扫描量热计(
DSC)测定的
玻璃化转变温度的范围内。
(式中,R 代表烷基、烯基、环烷基、具有醚键的烷基或与环烷基间断的烷基,这些基团各自具有 1 至 12 个碳原子;R1、R2、R3 和 R4 各自代表氢原子、卤素原子、烷基、环烷基、芳基、芳烷基或烷基芳基,这些基团各自具有 1 至 12 个碳原子,或 R1 和 R2 和/或 R3 和 R4 相互键合形成五至八元环)。