Contact lens

Details Contact lens Contact lens

1997-06-25

1999-03-16

Merriam, Andrew E. C.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523107, 523108, 526242, 526279, 5262924, 351160R, G02C 704, C08F 1820

Patent

active

058831525

ABSTRACT:
A contact lens contains a copolymer obtained by copolymerizing, as an indispensable feed monomer, 2 to 95 wt. % of a carboxylic acid ester monomer and 98 to 5 wt. % of a copolymerizable monomer. The carboxylic acid ester monomer is represented by the formula (I) ##STR1## wherein R.sub.1 stands for a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 1 to 12 carbon atoms, a cyclic alkyl group having 3 to 12 carbon atoms or an aryl group, and X stands for ##STR2## in which R.sub.2 and R.sub.3 each stand for a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 1 to 12 carbon atoms, a cyclic alkyl group having 3 to 12 carbon atoms or an aryl group, m and 1 being integers of from 0 to 4, at least one of R.sub.1, R.sub.2 and R.sub.3 being a group containing a fluorine atom and n being an integer of from 0 to 4.

REFERENCES:
patent: 4686267 (1987-08-01), Ellis et al.
patent: 4743106 (1988-05-01), Novicky
patent: 4948854 (1990-08-01), Amaya et al.
patent: 4996275 (1991-02-01), Ellis et al.
patent: 5032658 (1991-07-01), Baron et al.

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