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US 10,328,002 B2Granted
Dentifice compositions containing stannous compatible silica particles
AssigneeThe Procter & Gamble Company
InventorsLawrence Edward Dolan, Sanjeev Midha, Eva Schneiderman, Karl William Gallis, William Jackson Hagar, Terry William Nassivera
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Abstract
A dentifrice composition containing an abrasive and a stannous ion source. The abrasive can contain precipitated silica particles where the extractable stannous ions after 30 days at 40° C. is greater than about 75% of the initial extractable stannous ion concentration.
Claims19
A dentifrice composition comprising:
- a. an abrasive comprising precipitated silica particles characterized by;
- (i) a BET surface area in a range from about 0.1 to about 9 m2/g;
- (ii) a pack density in a range from about 35 to about 55 lb/ft3;
- (iii) an Einlehner abrasion value in a range from about 8 to about 25 mg lost/100,000 revolutions;
- (iv) a total mercury intrusion pore volume in a range from about 0.4-1.2cc/g;
- and
- (v) a stannous compatibility in a range from about 70 to about 99%;
- (vi) wherein the abrasive comprises large pores of a size of approximately 1000 Angstroms or greater and lacks small pores sized less than approximately 500-1000 Angstroms;
- b. a stannous ion source wherein the extractable stannous ions after 30 days at 40° C. is greater than about 75% of the total stannous ion concentration.
6 more elements
A dentifrice composition comprising:
- a. an abrasive comprising precipitated silica particles characterized by;
- (i) a BET surface area in a range from about 0.1 to about 9 m2/g;
- (ii) a pack density in a range from about 35 to about 55 lb/ft3;
- (iii) an Einlehner abrasion value in a range from about 8 to about 25 mg lost/100,000 revolutions;
- (iv) a total mercury intrusion pore volume in a range from about 0.4-1.2 cc/g;
- and
- (v) a stannous compatibility in a range from about 70 to about 99%;
- (vi) wherein the abrasive comprises large pores of a size of approximately 1000 Angstroms or greater and lacks small pores sized less than approximately 500-1000 Angstroms;
- b. a stannous ion source wherein an extractable stannous ion concentration after 30 days at 40° C. is greater than about 75% of the total stannous ion concentration;
- c. a fluoride ion source wherein the percent soluble fluoride after 30 days at 40° C. is greater than about 75% of the initial fluoride concentration;
- wherein the average RDA is less than about 220.
8 more elements
A dentifrice composition comprising:
- a. an abrasive comprising precipitated silica characterized by;
- (i) a BET surface area in a range from about 0.1 to about 9 m2/g;
- (ii) a pack density in a range from about 35 to about 55 lb/ft3;
- (iii) an Einlehner abrasion value in a range from about 8 to about 25 mg lost/100,000 revolutions;
- (iv) a total mercury intrusion pore volume in a range from about 0.4-1.2cc/g;
- and
- (v) a stannous compatibility in a range from about 70 to about 99%;
- (vi) wherein the abrasive comprises large pores of a size of approximately 1000 Angstroms or greater and lacks small pores sized less than approximately 500-1000 Angstroms;
- b. a stannous ion source wherein the composition wherein an extractable stannous ions after 30 days at 40° C. is greater than about 80% of the initial extractable stannous ion concentration;
- c. a soluble fluoride ion source wherein the composition comprises from about 550 ppm to about 1100 ppm soluble fluoride ions;
- wherein the dentifrice composition has an average RDA less than about 250;
- wherein the dentifrice composition has an average PCR greater than about 90.
9 more elements
Dependencies are inferred from the claim text.