Contact lenses based on biocompatible polyurethane and polyurea-

Details Contact lenses based on biocompatible polyurethane and polyurea- Contact lenses based on biocompatible polyurethane and polyurea-

1989-02-16

1989-12-12

Kight, John

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 60, 528 66, 528 77, 528 85, 528904, 523106, 351160R, C08G 1810

Patent

active

048868663

ABSTRACT:
Hydrophilic polymeric soft contact lenses which are characterized by their biocompatibility and resistance to nonspecific protein adsorption. At least 75%, preferably at least 80%, of the prepolymers from which the lenses are prepared are isocyanate-capped oxyethylene-based diols or polyols having molecular weight of about 7000-30,000. Essentially all of the hydroxyl groups of the diols or polyols are capped with polyisocyanate prior to formation of the hydrated polymer of which the contact lenses are made.

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