Patent ID: 8821901
Filing Date: 2014-09-02
Classification: A61C,A61K,A61L,A61Q,C08L

Abstract:
1. A method of preparing a bioadhesive, tooth whitening composition comprising: (i) blending a mixture comprising a (1:1) methyacrylic acid-ethyl acrylate copolymer, polyvinylpyrrolidone, poly(ethylene glycol) having a molecular weight from 200-600, and a tooth whitening agent, to thereby form a blended polymer-tooth whitening agent composition, wherein the amount of polyvinylpyrrolidone on a weight basis is greater than the amount of the methyacrylic acid-ethyl acrylate copolymer or the amount of the poly(ethylene)glycol, (ii). melting the blended polymer-tooth whitening agent composition from (i) to form a melted composition, and (iii). extruding the melted composition from (ii) to form an extruded tooth whitening composition, the extruded tooth whitening composition comprising from about 20-95 wt % polyvinylpyrrolidone, from about 0.5-40 wt % of methyacrylic acid-ethyl acrylate copolymer, and from about 0.5-60 wt % poly(ethylene glycol).