Water-absorptive contact lens and process for its production

Details Water-absorptive contact lens and process for its production Water-absorptive contact lens and process for its production

1994-06-20

1996-03-26

Reddick, Judy M.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523106, 525242, 525275, 525276, 525279, 525283, 525292, 525293, 525296, 525297, 525298, 525301, 525302, 525303, 525304, 525311, 525312, 525313, 525315, C08L 2900

Patent

active

055020860

ABSTRACT:
A water-absorptive contact lens obtained by saponification of a copolymer composed essentially of (A) from 1 to 30% by weight of a (meth)acrylate polymer having at least one polymerizable group per molecule on an average obtained by copolymerizing (a) an alkyl (meth)acrylate and (b) a monomer having at least two polymerizable groups per molecule, as the main components; (B) from 45 to 95% by weight of a fatty acid vinyl ester; (C) from 0.02 to 10% by weight of a crosslinking agent which is not decomposable by saponification; and (D) from 0.1 to 20% by weight of a crosslinking agent which is decomposable by saponification.

REFERENCES:
patent: 4727097 (1988-02-01), Kobayashi et al.
patent: 4745158 (1988-05-01), Nakashima et al.
patent: 4829126 (1989-05-01), Nakajima et al.
patent: 4921908 (1990-05-01), Ofstead
patent: 4978713 (1990-12-01), Goldenberg

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