C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/302, 88/40,
C08F 216/06 (2006.01) B29D 11/02 (2006.01) C08F 8/12 (2006.01) C08F 218/04 (2006.01) G02B 1/04 (2006.01)
Patent
CA 1238748
32889 CAN 5A -1- Abstract of the Disclosure 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.
454879
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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