Partial esters of a polyglycerol with at least one carboxylic acid and one polyfunctional carboxylic acid, their preparation and use
AssigneeEvonik Goldschmidt GmbH
InventorsHans Henning Wenk, Juergen Meyer, Stefan Bergfried, Hannelore Foetsch
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Abstract
The present disclosure relates to specific (poly-)glycerol partial esters with at least one carboxylic acid and one polyfunctional carboxylic acid, and to the use thereof as emulsifier and to formulations comprising partial esters of the present disclosure.
Claims15
A (poly-)glycerol partial ester having, on average, from 0.75 to 2.25 acid radicals of one or more carboxylic acids having 10 to 24 carbon atoms and having, on average, from 0.005 to 0.5 radicals of a polyfunctional carboxylic acid, comprising polyfunctional carboxylic acid ester (poly-)glycerol partial ester with the proviso that, following complete hydrolysis of the (poly-)glycerol partial ester, a (poly-)glycerol is obtained which has a homologue distribution with:
- glycerol:
- 0.01% by weight to 20% by weight,
- diglycerols:
- 0.01% by weight to 60% by weight,
- triglycerols:
- 0.01% by weight to 60% by weight,
- tetraglycerols:
- 0.01% by weight to 30% by weight,
- pentaglycerols:
- 0.01% by weight to 20% by weight, and
- oligoglycerols:
- ad 100% by weight.
A process for the preparation of a (poly-)glycerol partial ester comprising:
- providing a (poly-)glycerol having a homologue distribution with
- glycerol:
- 0.01 to 20% by weight
- diglycerols:
- 0.01 to 60% by weight
- triglycerols:
- 0.01 to 60% by weight
- tetraglycerols:
- 0.01 to 30% by weight
- pentaglycerols:
- 0.01 to 20% by weight, and
- oligoglycerols:
- ad 100% by weight;
- first esterifying some of the (poly-)glycerol with one or more carboxylic acid having 10 to 24 carbon atoms;
- and
- second esterifying with a polyfunctional carboxylic acid,
- where the molar ratio of the polyfunctional carboxylic acid used in the second esterifying step to (poly-)glycerol used said providing step is 1:2 to 1:200.
Dependencies are inferred from the claim text.