Hema copolymers having high oxygen permeability

Details Hema copolymers having high oxygen permeability Hema copolymers having high oxygen permeability

1974-11-22

1977-07-26

Wong, Jr., Harry

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260885, 264 1, 351159, 351160, 526258, 526264, 526320, C08F22020

Patent

active

040382648

ABSTRACT:
Hydrophilic copolymers are prepared of compounds having the formulae: ##STR1## where R is hydrogen or methyl, R.sub.2 is alkylene of 2 to 3 carbon atoms, R.sub.1 is alkoxy of 1 to 6 carbon atoms, R.sub.3 is alkylene of 2 to 3 carbon atoms and m is an integer of 2 to 6. The preferred copolymers are hydroxyethyl methacrylate-methoxytriethyleneglycol methacrylate copolymers. The products are characterized by having an unusually high oxygen permeability compared to other hydrophilic polymers and are particularly valuable in making contact lenses.

REFERENCES:
patent: 2412476 (1946-12-01), Semegen
patent: 2594560 (1952-04-01), Howard
patent: 3699089 (1972-10-01), Wichterle
patent: 3780003 (1973-12-01), Seymour et al.
patent: 3784540 (1974-01-01), Kliment et al.

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