Cross-linked hydrogel copolymers for contact lenses

Details Cross-linked hydrogel copolymers for contact lenses Cross-linked hydrogel copolymers for contact lenses

1979-11-29

1982-11-30

Anderson, Harold D.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525302, 525313, 526317, 5263231, 526336, G02C 704

Patent

active

043616577

ABSTRACT:
The invention relates to soft contact lenses having a water content of at least about 45% and comprising a hydrated copolymer of a major proportion of an hydroxyalkyl acrylate or methacrylate, up to 12% by weight of an ethylenically unsaturated acid or anhydride, a minor proportion of a cross-linking monomer and a minor proportion of styrene or a substituted styrene, the free acid or anhydride groups being in salt form.

REFERENCES:
patent: 3876581 (1975-04-01), Neogi

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