Hydrophilic, oxygen permeable contact lens

Details Hydrophilic, oxygen permeable contact lens Hydrophilic, oxygen permeable contact lens

1977-08-08

1978-12-19

Wong, Jr., Harry

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

20415922, 526287, 260 296H, 260 296SQ, 351160R, 428520, C08F21418, G02C 704

Patent

active

041307062

ABSTRACT:
A contact lens which when saturated with water has oxygen permeability of greater than 500 centibarrers and a receding contact angle with water of less than 35.degree.. The lens is formed of a polymer containing from 20 to 80 weight percent of repeating units of the structure ##STR1## where --R is --H or CH.sub.3 and R.sub.1 contains from 2 to 10 carbon atoms and at least one polar group. In a preferred aspect --R.sub.1 is --CH.sub.2 CH.sub.2 OH or --CH.sub.2 CHOHCH.sub.3. The polymer also contains from 80 to 20 weight percent of repeating units of the structure ##STR2## where --R.sub.2 is --H or --CH.sub.3 and n is 1 to 4.

REFERENCES:
patent: 3542461 (1970-11-01), Girard et al.
patent: 3950315 (1976-04-01), Cleaver

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