Fluorine and/or silicone containing poly(alkylene-oxide)-block copolymer hydrogels and contact lenses thereof
AssigneeCiba-Geigy Corporation
InventorsKarl F. Mueller, Walter L. Plankl
Life of this patent
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Abstract
Fluorine and/or silicone containing block copolymers are described which are the copolymerization product of mono; di- or trivinyl substituted poly(ethylene oxide) prepolymers (A) and fluoroalkyl-alkylene acrylates or methacrylates (B1), oligosiloxy-silyl alkyl-acrylates or methacrylates (B2), ether copolymerizable comonomers (C), and 0.1 to 10% of a di- or polyvinyl crosslinking comonomer (D) of 200 to 1000 molecular weight. The novel block copolymers are prepared in solution or bulk and form hydrogels, which are characterized by high oxygen permeability, resiliency, flexibility and wettability and are therefore well suited as biocompatible polymers, especially as contact lenses.
Claims58
A copolymer which is oxygen permeable, flexible, wettable, biocompatible and suitable for use in ophthalmic devices, such as contact lenses, which copolymer comprises the polymerization product of
- (A) 15 to 69.9% by weight of a vinyl-telechelic polyether substantially free of fluorine , or a mixture thereof,
- (B) 30 to 84.9% by weight of
- (B-1) a fluorinated, ethylenically unsaturated monomer, or
- (B-2) a silicone-containing ethylenically unsaturated monomer, or
- a mixture of monomer (B-1) and monomer (B-2),
- (C) 0 to 40% by weight of an ethylenically unsaturated monomer or mixture of monomers other than monomer (B-1) or monomer (B-2), and
- (D) 0.1 to 10% by weight of a polyethylenically unsaturated comonomer of 200 to 1000 molecular weight.
A copolymer according to claim 20 wherein QV is Q.sub.3 V or Q.sub.4 V and a is 1.
Dependencies are inferred from the claim text.