Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1984-09-19
1985-09-24
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
526279, 351160R, 351160H, 20415913, 20415922, 20415923, 528 32, 556419, C08G 7700
Patent
active
045433984
ABSTRACT:
Shaped articles, particularly ophthalmic devices, can be fabricated from oxygen transmissive, hydrolytically stable, polysiloxane copolymers of readily prepared poly(organosiloxane) monomers having monourethane acrylate groups and copolymerizable ethylenically-unsaturated monomers. The ophthalmic devices comprise copolymers of compositions containing 15 to 100 percent of said organopolysiloxane urethane acrylate and 85 to 0 percent of copolymerizable ethylenically-unsaturated monomers.
Ophthalmic devices which are fabricated from monourethane acrylates of polysiloxane alcohols have high oxygen permeability. A novel process is disclosed for the preparation of these polysiloxanes which have at least one urethane acrylate substituent.
REFERENCES:
patent: 3808178 (1974-04-01), Gaylord
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patent: 4259467 (1981-03-01), Keogh et al.
patent: 4261875 (1981-04-01), LeBoeuf
Refojo, M. F. et al., "Permeability of Dissolved Oxygen Through Contact Lenses-1. Cellulose Acetate Butyrate," Cont. Intraocular Lens Med. J. 3 (4), 27, (1977).
Bany Stephen W.
Koshar Robert J.
Williams Todd R.
Marquis Melvyn I.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Sherman Lorraine R.
Smith James A.
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