Back to results
US 4,503,098 AGranted
Disposable articles coated with degradable water insoluble polymers
AssigneeUnion Carbide Corporation
InventorJames E. Potts
Life of this patent
Estimating the term…
Abstract
Described herein are disposable articles made from a water soluble polymer or a substrate made from such polymer, a surface of said article or substrate coated with a degradable water-insoluble polymer.
Claims9
A process for producing a degradable article or substrate by coating a disposable article or substrate made from a water-soluble polymer selected from one or more of a poly(alkylene oxide), hydroxyethyl cellulose, hydroxypropyl cellulose, polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylamide, polyacrylic acid, or poly(vinyl methyl ether-co maleic anhydride):
- with a degradable water-insoluble polymer selected from one or more of a cyclic ester polymer, a poly(.beta.-hydroxy butyrate), a dialkanoyl polymer, or an ethylene polymer:
- which comprises forming a solution by dissolving the water-insoluble polymer in a solvent and then applying the solution containing from about 0.5 to about 10 wt. % of the polymer in the solvent to at least one surface of the article or substrate so as to form a coating thereon of from 0.05 to about 5 mils in thickness.
Dependencies are inferred from the claim text.