Oxygen permeable hard contact lens

Details Oxygen permeable hard contact lens Oxygen permeable hard contact lens

1983-01-21

1984-02-21

Marquis, Melvyn I.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

523107, 528 32, 351160R, 351160H, C08F 3008

Patent

active

044331258

ABSTRACT:
An oxygen permeable hard contact lens having an improved oxygen permeability and an improved fragility as well as excellent hardness and rigidity, made of a copolymer comprising an organosilane or organosiloxane having in one molecule at least one group of the general formula (I): ##STR1## wherein R.sup.1 is hydrogen atom or methyl group, k is 0 or 1, and l is 1 or 3,
and having at most 16 silicon atoms, and a fluoroalkyl acrylate or methacrylate of the general formula (II): ##STR2## wherein R.sup.1 is as defined above, m is 0 or 1, n is 0 or an integer of 1 to 3, and R.sub.f is a straight or branched fluoroalkyl group having 2 to 21 fluorine atoms.

REFERENCES:
patent: 3808178 (1974-04-01), Gaylord
patent: 3808179 (1974-04-01), Gaylord
patent: 3950315 (1976-04-01), Cleaver
patent: 4120570 (1978-10-01), Gaylord
patent: 4235985 (1980-11-01), Tanaka et al.

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