Colloid systems and wetting agents; subcombinations thereof; pro – Continuous or semicontinuous solid phase – The solid phase contains organic material
Reexamination Certificate
2000-12-26
2008-03-11
Gulakowski, Randy (Department: 1796)
Colloid systems and wetting agents; subcombinations thereof; pro
Continuous or semicontinuous solid phase
The solid phase contains organic material
C516S098000, C516S104000, C528S176000, C528S192000
Reexamination Certificate
active
07342050
ABSTRACT:
The invention concerns a method for preparing a lactic acid ester composition based on a lactic acid composition involving a step of transforming the composition into a lactic acid oligomeric composition having a mean degree of polymerisation (DPM) ranging between 2 and 30 approximately; and a step which involves mixing and reacting said oligomeric composition with an alcohol, in the presence of a transesterification catalyst, to esterify all or part of the lactic acid contained in said oligomeric composition. The invention also concerns the use of ethyl lactate as solvent for preparing gelified compositions.
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Comini Serge
Fleche Guy
Fuertes Patrick
Tamion Rodolphe
Gulakowski Randy
Kugel T. J.
Roquette Freres
Young & Thompson
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