Patent ID: 8647607
Filing Date: 2014-02-11
Classification: A61K,A61Q

Abstract:
1. A stabilized dry-type tooth whitening patch consisting essentially of an adhesive layer and a backing layer, wherein the adhesive layer comprises a peroxide tooth whitening agent selected from the group consisting of hydrogen peroxide, calcium peroxide, sodium percarbonate, sodium perborate, tetrasodium pyrophosphate peroxidate, and mixtures thereof in sufficient amounts; a hydrophilic glass polymer selected from the group consisting of polyvinyl pyrrolidone, Polyquatemium-11, Polyquaternium-39, polyvinyl pyrrolidone-vinyl acetate copolymer, and mixtures thereof in sufficient amounts; and a plasticizer selected from the group consisting of propylene glycol and glycerin; wherein the peroxide is stabilized in the dry-type patch by the hydrophilic glass polymer and the patch contains at least 85% of the amount of said peroxide for at least four weeks at a temperature of 40° C. and further wherein the adhesive layer's surface stickiness and color is not altered subsequent to one week of storage at a temperature of 40° C.