Process for preparing poly(vinyl trifluoroacetate) and...

Details Process for preparing poly(vinyl trifluoroacetate) and... Process for preparing poly(vinyl trifluoroacetate) and...

C - Chemistry, Metallurgy

08

F

C08F 18/20 (2006.01)

Patent

CA 2192696

A method for tbe production of poly(vinyl trifluoroacetate) and copolymers thereof with vinyl esters is described. Poly(vinyl trifluoroacetate) (PVTFA) is obtained in relatively high yield under mild conditions by using carbon dioxide under supercritical conditions as a solvent. 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 route to syndiotactic polyvinyl alcohol.

Procédé de production de poly(vinyltrifluoroacétate) et de copolymères de ladite substance avec des esters de vinyle. On obtient le poly(vinyltrifluoroacétate) (PVTFA) en relativement grandes quantités dans des conditions peu rigoureuses en utilisant du dioxyde de carbone dans des conditions supercritiques en tant que solvant. La synthèse de PVTFA syndiotactique à l'échelle industrielle sans utilisation de solvants néfastes pour l'environnement est rendue possible par la présente invention, qui fournit un processus pratique pour obtenir de l'alcool polyvinylique syndiotactique.

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