Copolymers comprising propellanes and contact lenses made...

Details Copolymers comprising propellanes and contact lenses made... Copolymers comprising propellanes and contact lenses made...

C - Chemistry, Metallurgy

08

F

C08F 230/08 (2006.01) B29D 11/00 (2006.01) C08F 2/00 (2006.01) C08G 61/06 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2080334

V-18810/A/CVE 31 Copolymers comprising propellanes and contact lenses made therefrom Abstract of the Disclosure The invention relates to contact lenses made from a copolymer comprising units of formula I Image (I) wherein R1 and R2 are each independently of the other hydrogen, alkyl, alkoxyalkyl, organosilylalkyl or organosilyl, R3 and R4 are each hydrogen or, taken together, are a divalent alkylene radical containing up to 8 carbon atoms, and A is a divalent substituted 1,2-ethylene radical which is derived from a copolymerisable vinyl monomer by virtue of the vinyl double bond being replaced with a single bond. The invention further relates to the copolymers themselves, to the use thereof for making contact lenses, and to a process for making contact lenses from such copolymers.

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