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US 4,454,295 AGranted
Cured cellulose ester, method of curing same, and use thereof
AssigneeUCO Optics, Inc.
InventorsJoseph W. Wittmann, John M. Evans
Life of this patent
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Abstract
Cellulose esters are cured by exposure to radiation preferably followed by exposure to elevated temperatures of at least about 100.degree. C. In addition, polymers obtained from reacting certain cellulose esters with certain polymerizable silicon esters are provided. The cured cellulose esters are suitable for producing transparent parts such as contact lenses.
Claims12
A composition from the polymerization of a composition comprising an organic cellulose ester selected from the group of cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate or mixtures thereof;
- and a polymerizable ethylenically unsaturated silicone ester.
Dependencies are inferred from the claim text.