Anhydrous tooth whitening gel
AssigneeLaclede Professional Products, Inc.
InventorsMichael A. Pellico, Veronica Sababa
Life of this patent
Estimating the term…
Abstract
An anhydrous dental bleaching gel composition is provided which has improved package stability, improved rheology and reduced sensitivity during use. An illustrative anhydrous dental bleaching gel composition embodying these features comprises propylene glycol, polyethylene glycol, glycerin in an amount not exceeding about 10 wt. %, neutralized carboxypolymethylene, hydroxypropylcellulose, and carbamide peroxide.
Claims20
An anhydrous tooth whitening gel composition comprising carbamide peroxide dispersed in an anhydrous gelatinous carrier, said carrier comprising:
- (a) a liquid polyol wherein glycerin, if present, is limited to an amount that does not exceed about 10 wt. % based on the total weight of the composition;
- and
- (b) a thickener component containing neutralized carboxypolymethylene and cellulosic ether soluble in the liquid component,
- said anhydrous tooth whitening gel composition having enhanced package stability, reduced tooth sensitivity, and improved thixotropic properties.
An anhydrous tooth whitening gel composition comprising:
- (a) propylene glycol in an amount from about 10 wt. % to about 55 wt. %,
- (b) polyethylene glycol in an amount from about 10 wt. % to about 50 wt. %, and having a molecular weight from about 400 to about 1500,
- (c) glycerin in an amount from about 0 wt. % to about 10 wt. %,
- (d) carboxypolymethylene in an amount from about 0.5 wt. % to about 3.0 wt. %,
- (e) hydroxypropylcellulose in an amount from about 0.5 wt. % to about 10 wt. %,
- (f) neutralizing reagent in an amount to substantially neutralize carboxypolymethylene, and
- (g) carbamide peroxide in an amount from about 5.0 wt. % to about 25 wt. %,
- said anhydrous tooth whitening gel composition having enhanced package stability, reduced tooth sensitivity, and improved thixotropic properties.
A method for whitening teeth which comprises:
- (1) extruding an anhydrous tooth whitening gel composition into the reservoir system of a tooth bleaching dental tray, said gel composition comprising:
- (a) propylene glycol in an amount from about 10 wt. % to about 55 wt. %,
- (b) polyethylene glycol in an amount from about 10 wt. % to about 50 wt. %, and having a molecular weight from about 400 to about 1500,
- (c) glycerin in an amount from about 0 wt. % to about 10 wt. %,
- (d) carboxypolymethylene in an amount from about 0.5 wt. % to about 3.0 wt. %,
- (e) hydroxypropylcellulose in an amount from about 0.5 wt. % to about 10 wt. %,
- (f) neutralizing reagent in an amount to substantially neutralize carboxypolymethylene, and
- (g) carbamide peroxide in an amount from about 5.0 wt. % to about 25 wt. %;
- (2) placing said dental tray in the oral cavity so as to bring the gel composition into contact with the teeth to be whitened;
- (3) maintaining said gel composition in contact with said teeth for a plurality of hours per day;
- and
- (4) repeating steps 1, 2 and 3 for multiple days to thereby whiten the teeth,
- said anhydrous tooth whitening gel composition having enhanced package stability, reduced tooth sensitivity, and improved thixotropic properties.
A method for preparing an anhydrous tooth whitening gel composition, which method comprises admixing:
- (a) propylene glycol in an amount from about 10 wt. % to about 55 wt. %,
- (b) polyethylene glycol in an amount from about 10 wt. % to about 50 wt. %,
- (c) glycerin in an amount from about 0 wt. % to about 10 wt. %,
- (d) carboxypolymethylene in an amount from about 0.5 wt. % to about 3.0 wt. %,
- (e) hydroxypropylcellulose in an amount from about 0.5 wt. % to about 10 wt. %,
- (f) neutralizing reagent in an amount to substantially neutralize carboxypolymethylene, and
- (g) carbamide peroxide in an amount from about 5.0 wt. % to about 25 wt. %,
- (h) wherein weight percent is based on the total weight of the gel composition,
- said anhydrous tooth whitening gel composition having enhanced package stability, reduced tooth sensitivity, and improved thixotropic properties.
Dependencies are inferred from the claim text.