Water-absorptive soft contact lens material and contact lens mad

Details Water-absorptive soft contact lens material and contact lens mad Water-absorptive soft contact lens material and contact lens mad

1996-09-10

1998-07-28

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526279, 5263031, 5263285, 526347, C08F22606, C08F23008, C08F22056, C08F22018

Patent

active

057864349

ABSTRACT:
A water-absorptive soft contact lens material having a high transparency, an excellent flexibility, a high oxygen permeability independent of water content, a high mechanical strength and an adequate hardness, which comprises a copolymer prepared by the polymerization of a monomer mixture comprising an N,N-dialkyl acrylamide or methacrylamide, an N-vinyllactam and a bis(silicon-containing alkyl) fumarate in a specific ratio, and which provides water-absorptive soft contact lenses having excellent properties such as high transparency and high oxygen permeability.

REFERENCES:
patent: 4868260 (1989-09-01), Kawaguchi
patent: 5023305 (1991-06-01), Onozuka et al.
patent: 5250583 (1993-10-01), Kawaguchi et al.
patent: 5374662 (1994-12-01), Lai et al.
patent: 5391591 (1995-02-01), Kawaguchi et al.
patent: 5539016 (1996-07-01), Kunzler et al.

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