Method of hydrophilic coating of plastics
OwnerGregory Halpern, Charles Campbell +2inventors
InventorsGregory Halpern, Charles Campbell, Ellington M. Beavers, Huk Y. Cheh
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Abstract
Plastics, particularly a method hydrophilic coating of plastics, for example, a contact lens, with a lubricating and visually acute mucopolysaccharide film which is immobilized upon the surface of the plastic for the lifetime of the plastic. A preferred method includes first coating the plastic with an aqueous solution of a mucopolysaccharide, drying by applying a water-miscible solvent, then crosslinking and permanently immobilizing the first coating upon the plastic by applying a solution of catalyzed organic soluble aliphatic polyisocyanate.
Claims4
Method of hydrophilic coating of normally hydrophobic plastics to add wetability and lubricity comprising the steps of:
- (a) first coating a surface of the plastic with an aqueous solution of a mucopolysaccharide to define a wet film, then;
- (b) dehydrating water from said solution by applying a water-miscible solvent so as to precipitate mucopolysaccharide as a film onto said plastic surface, and drying said film;
- (c) subsequently to said drying, crosslinking and immobilizing said first coating upon the plastic by applying a solution of catalyzed organic-soluble aliphatic polyisocyanate.
Method of hydrophilic colating of normally hydrophobic plastics to add wetability and lubricity comprising the steps of:
- (a) first coating the plastic with an aqueous solution of sodium hyaluronate, then;
- (b) dehydrating water from said solution by applying a water-miscible solvent so as to precipitate sodium hyaluronate as a film onto said plastic surface and drying said film;
- and,
- (c) subsequently to said drying, crosslinking and immobilizing said first coating by applying a solution of catalyzed organic-soluble aliphatic polyisocyanate.
Dependencies are inferred from the claim text.