Siloxane-containing polymers and contact lenses therefrom

Details Siloxane-containing polymers and contact lenses therefrom Siloxane-containing polymers and contact lenses therefrom

C - Chemistry, Metallurgy

07

F

88/40, 402/9, 26

C07F 7/18 (2006.01) C08F 283/12 (2006.01) G02C 7/04 (2006.01)

Patent

CA 1235707

SILOXANE-CONTAINING POLYMERS AND CONTACT LENSES THEREFROM ABSTRACT OF THE DISCLOSURE There are prepared acrylates and methacrylates of the formula Image wherein R is hydrogen or methyl, and wherein A is the unit (I) Image wherein x is 0 to 4, or the unit (II) Image . The novel siloxane compounds can be copolymerized with (1) a monoethylenically unsaturated monomer and (2) a polyethylenically unsaturated crosslinking agent. The resulting copolymers have high oxygen permeability and proper hydrophilic property. They can be made substantially water non-absorptive. Contact lenses fabricated from such copolymers can, if desired, be worn continuously for long periods of time.

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