Polymers and hard, gas-permeable contact lenses made therefrom

Details Polymers and hard, gas-permeable contact lenses made therefrom Polymers and hard, gas-permeable contact lenses made therefrom

C - Chemistry, Metallurgy

08

F

C08F 130/08 (2006.01) C08F 214/18 (2006.01) C08F 220/22 (2006.01) C08F 230/08 (2006.01) C08F 290/06 (2006.01) G02B 1/04 (2006.01) G02C 7/04 (2006.01)

Patent

CA 2041494

v-118053/A/TIT 16 Novel polymers and hard, gas-permeable contact lenses made therefrom Abstract The present invention relates to novel polymers, to processes for the preparation thereof, to contact lenses consisting substantially of those polymers and to processes for the manufacture thereof and to the use of the novel polymers for the manufacture of contact lenses. The polymers according to the invention are especially the copolymerisation products of monomer mixtures comprising the following monomers: a) 20-60 % siloxane monovinyl component b) 1-25 % siloxane oligovinyl component c) l0-55 % fluorine-containing vinyl component d) 3-30 % hydrophobic vinyl component having a bulky hydrocarbon radical, e) 0-10 % hydrophilic vinyl component f) 0-15 % additional cross-linking vinyl component. The novel polymers and the contact lenses made therefrom are distinguished by a high degree of hardness while at the same time being highly permeable to oxygen.

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