Process for the plasticization of lactic acid polymers

Details Process for the plasticization of lactic acid polymers Process for the plasticization of lactic acid polymers

C - Chemistry, Metallurgy

08

J

C08J 3/18 (2006.01) C08G 63/06 (2006.01) C08L 67/04 (2006.01) C08J 5/18 (2006.01)

Patent

CA 2712709

Method for plasticizing lactic acid polymers, characterized in that it comprises grinding the lactic acid polymers, mixing said ground lactic acid polymers in the solid state with mixtures of lactic acid oligomers, subjecting the mixture to a temperature of between 150 and 200 C and to a pressure of between 1.4 and 4 bar, and shaping the mixture, over a period of time of less than 30 minutes from initiation of contact between the lactic acid oligomers and the lactic acid polymers.

L'invention concerne un procédé de plastification de polymères d'acide lactique, consistant à triturer des polymères d'acide lactique, à mélanger les polymères d'acide lactique triturés et à l'état solide avec des mélanges d'oligomères d'acide lactique, à soumettre le mélange à une température comprise entre 150 et 200°C et à une pression comprise entre 1,4 et 4 bars, puis à former le mélange pendant une durée inférieure à 30 minutes à compter de l'entrée en contact des oligomères d'acide lactique avec les polymères d'acide lactique.

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