Patent ID: 6770266
Filing Date: 2004-08-03
Classification: A61K,A61Q

Abstract:
An aqueous tooth whitening liquid composition suitable for application to teeth in the oral cavity comprising a peroxide dispersed in an orally acceptable vehicle comprising water and a monohydric alcohol and a film forming combination of a poly(ethylene oxide) and a Carbomer,wherein said film-forming poly(ethylene oxide) has a molecular weight from about 100,000 to 4,000,000, and is present in the composition in an amount from about 5 to about 50 weight %, and wherein the carbomer is a cross-linked acrylic acid copolymer and is present in an amount from about 0.25 to about 1.5 weight %, and wherein the peroxide is hydrogen peroxide, urea peroxide, or sodium percarbonate, and is present at a concentration of about 5 to about 30% by weight, wherein said monohydric alcohol is present at a concentration of about 10 to about 50% by weight, and thereby imparts a rapid drying property, and wherein water is included in a concentration of about 15 to about 70% by weight, and wherein said aqueous tooth whitening liquid composition has a PH maintained at about 3.5 to about 5.5 with a buffering salt, said carbomer at said acidic PH levels, in combination with said poly(ethylene oxide) maintaining a consistency enabling the product to be painted on the tooth surface, drying to yield a strongly adherent clear, or tooth-colored, invisible film, sufficiently strong and adherent to effect stain removal from the teeth as a whitening result.