Method for plasticizing lactic acid polymers

Details Method for plasticizing lactic acid polymers Method for plasticizing lactic acid polymers

2008-01-25

2011-12-27

Seidleck, James J (Department: 1762)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C241S023000, C428S402000, C525S410000, C525S411000, C525S415000, C528S354000, C528S361000

Reexamination Certificate

active

08084551

ABSTRACT:
Plasticization process for lactic acid polymers characterized in that it includes the grinding of the lactic acid polymers, the mixing of said ground and solid state lactic acid polymers, with mixtures of lactic acid oligomers, the subjecting of the mixture to a temperature of between 150° C. and 200° C. and at a pressure of between 1.4 bar and 4 bar, and the making up of the mixture, in a period of time of less than 30 minutes from the moment the lactic acid oligomers come in contact with lactic acid polymers.

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Ke, T.; Sun, S.X.; Seib, P.; Journal of Applied Polymer Science, 2003, vol. 89, p. 3639-3646.

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