VERFAHREN ZUR HERSTELLUNG VON POLY(VINYL TRIFLUORACETAT) UND POLY(VINYL TRIFLUORACETAT/VINYL ESTER) IN ABWESENHEIT VON CHLOROFLUORKOHLENWASSERSTOFF LOESUNGSMITTEL

摘要

A method for the production of poly(vinyl trifluoroacetate) and copolymers thereof with vinyl esters is described. Poly(vinyl trifiuoroacetate) (PVTFA) is obtained in essentially quantitative yield under mild conditions by using non-chlorofluorocarbon solvents comprising siloxanes or perfluorinated fluids. Hexamethyl disiloxane is a particularly useful example of such solvents. Synthesis of syndiotactic PVTFA on a commercial scale without the use of environmentally-harmful solvents is made possible by the invention, which provides a convenient commercial route to syndiotactic polyvinyl alcohol.