Hydrophilic materials

Details Hydrophilic materials Hydrophilic materials

1988-05-18

1990-02-13

Schofer, Joseph L.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523108, 524463, 525100, 525103, C08J 300

Patent

active

049007645

ABSTRACT:
Hydrophilic polymers of the type suitable for use in making contact lenses and having a wide range of controllable properties including strength and gas permeability are formed from acrylonitrile or methyl methacrylate or an analogue thereof, 1-vinyl-2-pyrrolidinone and an appropriate amount of a cross-linking agent. Contact lenses (3) having an interferometric pattern thereon are also disclosed.

REFERENCES:
patent: 3878175 (1975-04-01), Steckler
patent: 4184992 (1980-01-01), Hosaka
patent: 4433111 (1984-02-01), Tighe et al.
patent: 4493910 (1985-01-01), Tighe et al.
patent: 4663409 (1987-05-01), Friends et al.
patent: 4668506 (1987-05-01), Bawa

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