| abstract |
This invention relates to a family of aliphatic esters having the following general structure: R 1 -O- C(0)-R 4 -C(O)-[-0-R 2 -O-C(O)-R 5 -C(O)-] m -O-R 3 in which: R 1 is selected from one or more of the groups consisting of H, linear and branched saturated and unsaturated alkyl residues of the C 1 -C 24 type, and polyol residues esterified with C 1 -C 24 monocarboxylic acids; R 2 comprises -CH 2 -C(CH 3 ) 2 -CH 2 - and C 2 -C 8 alkylene groups, and comprises at least 50% in moles of the said -CH 2 -C(CH 3 ) 2 -CH 2 - groups; R 3 is selected from one or more of the groups consisting of H, linear and branched saturated and unsaturated alkyl residues of the C 1 -C 24 type, and polyol residues esterified with C 1 -C 24 monocarboxylic acids; R 4 and R 5 comprise one or more C 2 -C 22 alkylenes and comprise at least 50% in moles of C 7 alkylenes; m lies between 1 and 20; at least one of R 1 and/or R 3 comprise polyol residues esterified with at least one C 1 -C 24 monocarboxylic acid selected from the group consisting of stearic acid, palmitic acid, 9- ketostearic acid, 10-ketostearic acid and mixtures thereof. These esters are particularly suitable for use as plasticisers for various types of polymers such as for example vinyl polymers of the polyvinyl chloride (PVC) type, thermoplastic elastomers, and hydroxy acid polyesters, for example polyesters of lactic acid. |