Polyglycerol partial esters of polyricinoleic acid and polyfunctional carboxylic acids and the use thereof for producing emulsions and dispersions
View Patent ↗The invention relates to polyglycerol partial esters of polyricinoleic acid and polyfunctional carboxylic acids, obtainable by esterification of a a) polyglycerol mixture with b) at least one polyricinoleic acid and c) at least one di- and/or tricarboxylic acid and optionally d) at least one fatty acid having 6 to 22 carbon atoms by methods known per se, and to the use thereof for producing cosmetic or pharmaceutical emulsions or dispersions.
1. A polyglycerol partial ester of polyricinoleic acid and sebacic acid, prepared by esterification of a polyglycerol mixture with components comprising:
(i) at least one polyricinoleic acid of the general formula 1
is a hydroxy fatty acid group selected from ricinoleic acid and hydroxystearic acid groups, provided that at least a portion of the hydroxy fatty acid groups includes one or more ricinoleic acid groups, wherein N is a number from 1 to 10; and
(ii) sebacic acid;
wherein said polyglycerol mixture has a homolog distribution in which glycerol is in an amount of less than 5% by weight of the polyglycerol mixture.
2. The polyglycerol partial ester of claim 1 , wherein the polyglycerol mixture has an average degree of condensation of from 1 to 11.
3. The polyglycerol partial ester of claim 1 , wherein the polyricinoleic acid has an average degree of condensation of from 1 to 10.
4. The polyglycerol partial ester of claim 1 , wherein between 20 and 75% of the OH groups of the polyglycerol mixture are esterified.
5. The polyglycerol partial ester of claim 1 , prepared by esterification of
a) 1.0 mol of OH groups of the polyglycerol mixture with
b) 0.01 to 0.5 mol of COOH groups of the polyricinoleic acid and
c) 0.01 to 0.5 mol of COOH groups of said sebacic acid,
with the proviso that the sum of the COOH groups corresponds to about 20 to 75% of the OH groups of the polyglycerol mixture.
6. A cosmetic, dermatological or pharmaceutical preparation which comprises at least one of the polyglycerol partial esters as claimed in claim 1 , and optionally, one or more of auxiliaries and/or additives.
7. A care and cleaning composition for household and industrial applications which comprises at least one of the polyglycerol partial esters as claimed in claim 1 , and optionally, one or more of auxiliaries and/or additives.
8. The polyglycerol partial ester of claim 1 , further comprising a polyhydroxystearic acid.
9. The polyglycerol partial ester of claim 1 , wherein said sebacic acid is in an amount of up to 6.3% by weight of the total weight of the polyglycerol partial ester composition.