Keratoprosthetic polyurethane
AssigneeThermo Electron Corporation
InventorMichael Szycher
Life of this patent
Estimating the term…
Abstract
A reaction product of methylene diisocyanate, polytetramethylene ether glycol and ethylene oxide-capped trimethylol propane. The resulting polyurethane is optically clear and suitable for use as an artificial cornea, or a permanently implantable lens.
Claims4
An artificial cornea intended for implantation in a human eyeball, said cornea being characterized in that it is formed from an aliphatic polyurethane elastomer, said polyurethane elastomer being the reaction product of:
- (1) hydrogenated methylene diisocyanate;
- (2) polytetramethylene ether glycol having a molecular weight between the range of 500-5000;
- and
- (3) ethylene oxide-capped trimethylol propane.
An artificial lens intended for implantation in a human eyeball, said lens being characterized in that it is formed from an aliphatic polyurethane elastomer, said polyurethane elastomer being the reaction product of:
- (1) hydrogenated methylene diisocyanate;
- (2) polytetramethylene ether glycol having a molecular weight between the range of 500-5000;
- and
- (3) ethylene oxide-capped trimethylol propane.
Dependencies are inferred from the claim text.