Copolymers of poly(vinyl trifluoroacetate) or poly(vinyl alcohol

Details Copolymers of poly(vinyl trifluoroacetate) or poly(vinyl alcohol Copolymers of poly(vinyl trifluoroacetate) or poly(vinyl alcohol

1983-06-03

1985-07-09

Michl, Paul R.

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

Synthetic resins

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

5253262, 525378, 525379, 526245, C08F 3200

Patent

active

045283257

ABSTRACT:
Novel, non-crosslinked copolymers of vinyl trifluoroacetate (VTA) and up to 5 weight percent of the VTA of certain comonomers, such as vinyl esters or disubstituted ethylene monomers, are disclosed. Solvolysis of these copolymers provides novel water-insoluble, non-crosslinked, poly(vinyl alcohol) copolymers which can be hydrated to copolymers having controllably variable hydrogel properties and high strength. Such poly(vinyl alcohol) copolymers are particularly desirable as optical devices such as contact lenses.

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Harris, et al., J. Polymer Sci., A-1, 4, 665-677, (1966).
Haas, et al., J. Polymer Sci., 22, 291, (1956).
L. A. Vol'f, et al., Khim. Volokna, 2, 14, (1979).

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