ALKANEDIOICACID-BRANCHED GLYCOL-MONOAROMATIC ACID POLYESTER PLASTICIZERS AND POLYVINYLCHLORIDE OSITIONS CONTAINING THE SAME

摘要

Improved chain-stopped polyester plasticizers for polyvinyl chloride homopolymers and copolymers are provided. The chain-terminated polyester has an average molecular weight between 1500 and 10000, and is obtained from the esterification of (a) an alpha-omega alkanedioic acid containing from 4 to 12 carbon atoms and (b) a branched chain dihydric alcohol containing from 4 to 10 carbon atoms and having only primary and secondary hydroxyl groups with (c) 3 to 15 mol percent, based on the total organic acids, of an aromatic monocarboxylic acid containing from 7 to 20 carbon atoms. The plasticizers show little or no tendency to migrate from PVC, yet they are readily processable with the PVC. While being extremely compatible with PVC the present plasticizers bave very low affinity for ABS and polystyrene resins and therefore can be used in applications where plasticized PVC comes in contact with these other resins.