Non-hydrous soft contact lens and process for producing the same

Details Non-hydrous soft contact lens and process for producing the same Non-hydrous soft contact lens and process for producing the same

1986-11-28

1988-04-12

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C08F 1820

Patent

active

047375566

ABSTRACT:
A non-hydrous soft contact lens comprising a copolymer comprising, as monomer units, 49.9 to 95 mole % of an acrylate represented by Formula (I) shown below, 0 to 10 mole % of acrylic acid or the specified ester thereof, 4.9 to 50 mole % of a methacrylate represented by Formula (II) shown below, and 0.1 to 10 mole % of a crosslinking monomer. ##STR1## wherein R.sup.1 is at least one selected from the group consisting of a particular straight chain fluoroalkyl group and a particular straight chain alkyl group. ##STR2## wherein R.sup.2 is a particular straight chain fluoroalkyl group. The present soft contact lens requires no sterilization by boiling, and has good resistance to stain, good oxygen permeability, good elastic recovery and good shape stability.
A process for producing the above non-hydrous soft contact lens, comprising the step of subjecting a rigid precursor lens to treatment(s) of esterification and/or transesterification, is also disclosed.

REFERENCES:
patent: 3808179 (1974-04-01), Gaylord
patent: 3850892 (1974-11-01), Shen et al.
patent: 3950315 (1976-04-01), Cleaver
patent: 4540761 (1985-09-01), Kawamura et al.

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