Method for preparing poly(vinyl trifluoroacetate) and poly(vinyl

Details Method for preparing poly(vinyl trifluoroacetate) and poly(vinyl Method for preparing poly(vinyl trifluoroacetate) and poly(vinyl

1994-08-04

1995-05-09

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

526194, 526206, 526245, C08F 1418

Patent

active

054140480

ABSTRACT:
A method for the production of poly(vinyl trifluoroacetate) and copolymers thereof with vinyl esters is described. Poly(vinyl trifluoroacetate) (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.

REFERENCES:
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patent: 4673539 (1987-06-01), Hammar et al.
patent: 5135998 (1992-08-01), Mares et al.
Haas et al., Journal of Polymer Science, vol. 22, p. 291 (1956).
Pritchard et al., Journal of Polymer Science, Part A-1, vol. 4, p. 707 (1966).
Harris et al., Journal of Polymer Science, Part A-1, p. 665 (1966).
Polymer Handbook, Third Edition, J. Brandrup and E. H. Immergut, Eds., Wiley, N.Y., pp. VII-519, (1989).
W. Knoll, "Chemistry and Technology of Silicones", Academic Press, (1968).

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