Contact lens material

Details Contact lens material Contact lens material

1987-11-12

1989-03-21

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526264, 526279, 523107, 528 32, 351160R, 351160H, C08F 1820, C08F 2022, C08F 2608

Patent

active

048144029

ABSTRACT:
A contact lens material composed of a copolymer of a monomer mixture comprising, as essential monomers, from 5 to 20 parts by weight, based on 100 parts by weight of the total monomer mixture, of a hydrophilic monomer consisting of from 40 to 60 mol % of N-vinyl-2-pyrrolidone and from 40 to 60 mol % of metharylic acid and from 30 to 95 parts by weight, based on 100 parts by weight of the total monomer mixture, of at least one of a silicon-containing acrylate and a silicon-containing methacrylate.

REFERENCES:
patent: 3808178 (1974-04-01), Gaylord
patent: 4433125 (1984-02-01), Ichinobe et al.
patent: 4450264 (1984-05-01), Cho
patent: 4540761 (1985-09-01), Kawamura et al.
patent: 4602074 (1986-07-01), Mizutani et al.

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