C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/9
C08F 230/08 (2006.01) C08F 220/54 (2006.01) C08F 226/06 (2006.01) C08F 283/12 (2006.01) G02B 1/04 (2006.01)
Patent
CA 1118938
THE ABSTRACT OF INVENTION A new composition of matter specially adapted for the production of contact lenses, artificial eyes or other prosthetic devices. The composition has the characteristics of increased hydrophilicity, softness after hydration and oxygen permeability. The composition is a solid copolymer of comonomers consisting essentially of about 15 to about 65% by weight of one or more of the hydrophilic amide group containing monomers and about 10 to about 75% by weight of one or more of the copolymeric organosiloxane. Optionally, about 0.1 to about 65% by weight of at least one property modifier, a vinyl group containing monomer such as methyl methacrylate, can be employed into the copolymers. The inven- tive material is optionally transparent, translucent or opaque depending on the type, composition and relative content of the comonomers used. In general, the transparent composi- tion is suitable for use in making contact lenses.
331869
Chang Sing-Hsiung
Gowling Lafleur Henderson Llp
LandOfFree
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