| abstract |
Mixed esters comprising the reaction product of a) an aliphatic, cycloaliphatic and/or aromatic C2-C22-dicarboxylic acid containing up to 2 hydroxyl groups, or a mixture thereof; b) an aliphatic polyol containing from 3 to 6 hydroxyl groups or a mixture thereof; and c) an aliphatic C2-C32-monocarboxylic acid containing up to 2 hydroxyl groups, or a mixture thereof; wherein the molar ratio of components a) and b) is approximately n-1:n, wherein n is an integer of from 6 to 15, and component c) is selected so that at least one free hydroxyl group is present per molecule of the mixed ester, are useful as lubricants for the molding of thermoplastic plastics, especially polyvinyl chloride homopolymers or copolymers. |