Process for forming an optically clear polyurethane lens or corn

Details Process for forming an optically clear polyurethane lens or corn Process for forming an optically clear polyurethane lens or corn

1981-02-27

1983-05-31

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

528 77, B29D 1100

Patent

active

043860397

ABSTRACT:
Process for forming optically clear lenses or artifical corneas from a reaction product of 4,4' dicyclohexylmethane 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.

REFERENCES:
patent: 2542386 (1951-02-01), Beattie
patent: 3336242 (1967-08-01), Harpson et al.
patent: 3604016 (1971-09-01), Robinson et al.
patent: 3635904 (1972-01-01), Briggs
patent: 3746683 (1973-07-01), Salyer et al.
patent: 3798200 (1974-03-01), Kaneko et al.
patent: 3804812 (1974-04-01), Koroscil
patent: 3939021 (1976-02-01), Nishibayashi et al.
patent: 4131604 (1978-12-01), Szycher

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