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US 9,408,780 B2Granted
Denture adhesive hydrogel with dry tack
AssigneeCombe Incorporated
InventorMichael J. Borja
Life of this patent
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Abstract
A dry tack denture adhesive hydrogel comprising a mixed salt of a copolymer of alkyl vinyl ether and maleic anhydride or maleic acid, a hygroscopic nonionic polymer, and water is provided. A method for preparation of the denture adhesive hydrogel is also disclosed.
Claims22
A denture adhesive hydrogel comprising:
- (a) a mixed salt of a copolymer of alkyl vinyl ether, and (i) maleic anhydride or (ii) maleic acid,
- wherein the mixed salt comprises monovalent and multivalent cationic salts selected from the group consisting of sodium, calcium, zinc, strontium, ferric and mixtures thereof;
- (b) a dry tack enhancing agent being polyvinylpyrrolidone, and optionally one or both of polyethylene oxide and a cellulose derivative, wherein the dry tack agent is in an amount of about 0.1% to less than 5.0% by weight of the hydrogel;
- and
- (c) water,
- wherein the hydrogel has a dry tack physical characteristic.
3 more elements
Dependencies are inferred from the claim text.