Polylactic acid resin composition, moldings, and process for...

Details Polylactic acid resin composition, moldings, and process for... Polylactic acid resin composition, moldings, and process for...

2011-03-22

2011-03-22

Wu, David (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S556000, C528S354000

Reexamination Certificate

active

07910643

ABSTRACT:
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 R4each represent a hydrogen atom, halogen atom, alkyl, cycloalkyl, aryl, aralkyl, or alkylaryl, the groups each having 1 to 12 carbon atoms, or R1and R2and/or R3and R4bond to each other to form a five- to eight-membered ring.)

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