Lactic acid based compositions with enhanced properties

Details Lactic acid based compositions with enhanced properties Lactic acid based compositions with enhanced properties

2009-01-16

2011-12-06

Wu, David W (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...

C525S408000, C525S410000, C525S415000, C525S437000, C525S450000, C525S454000

Reexamination Certificate

active

08071690

ABSTRACT:
A crosslinked lactic acid polymer composition containing (i) a macromer comprising (i-a) a flexible segment produced by the condensation of two or more compounds selected from the group consisting of lactones, furans, epoxies, isocyanates, anhydrides, dianhydrides, alcohols, diols, triols, carboxylic acids, dicarboxylic acids, tricarboxylic acids, esters, diesters, triesters, ethers, diethers, and triethers; and (ii) a lactic acid polymer produced by the condensation of a lactic acid monomer ordimer selected from the group consisting of D-lactic acid, L-lactic acid, D,L-lactic acid, L,L-lactide, D,D-lactide, and D,L-laclide; wherein the macromer and the lactic acid polymer contain carbon-carbon single-bond crosslinks. The macromer may further contain (i-b) a lactic acid segment produced by the condensation of a lactic acid monomer or dimer selected from the group consisting of D-lactic acid, L-lactic acid, D,L-lactic acid, L,L-lactide, D,D- lactide, and D,L-lactide with a polytunctional monomer selected from the group consisting of dianhydrides, diols, triols, dicarboxylic acids, and tricarboxylic acids. Also, methods of producing the polymer composition.

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