Patent ID: 8840918
Filing Date: 2014-09-23
Classification: A61C,A61K,A61L,A61Q,C08L

Abstract:
1. An in-vivo film forming liquid teeth whitening composition comprising: (a) 2-6 wt % of a water-swellable, water-insoluble acrylate-based polymer or copolymer comprising monomers selected from acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, methyl methacrylate, and ethyl methacrylate; (b) 4-10 wt % of a poly(N-vinyl lactam); (c) 0.5-10 wt % of a polyalkylene glycol having a molecular weight ranging from about 300 to about 600 daltons, and (d) 1-30 wt % of a whitening agent, dissolved in a solvent mixture comprising water and a lower alcohol, wherein, the liquid composition upon application to the surface of the teeth and evaporation of the lower alcohol, forms a hydrogel film that is insoluble or slowly soluble in saliva at body temperature to thereby remain on the teeth surface for a period of over at least 10 minutes.