Claims
- 1. A dentifrice toothpaste of superior cleaning and polishing characteristics having a pH maintained above about 7, comprising an alkali metal or alkaline earth metal aluminosilicate as a siliceous abrasive and flat flakes or crystals of alpha alumina as a calcined alumina abrasive having a particle size of about 1 to 15 microns in diameter and in an amount to provide a radioactive enamel abrasion to the dentifrice of above about 450, said calcined alumina being present in an amount of at least 7.5% and up to 20% by weight, and said siliceous abrasive being present in an amount of at least 10% and up to 70% by weight of said dentifrice, and about 0.1 to 5% by weight of a calcium, magnesium or sodium salt, selected from the group consisting of the carbonates, bicarbonates, chlorides, phosphates, silicates and nitrates, so as to reduce said enamel abrasion of the dentifrice.
- 2. A dentifrice in accordance with claim 1, wherein the pH of the dentifrice is increased by the addition of an alkaline agent to effect an additional reduction in enamel abrasivity.
- 3. A dentifrice as in claim 2, containing an alkaline buffering agent to maintain a pH above about 7.
- 4. A dentifrice as in claim 1 in which said calcined alumina is in the form of alpha alumina flakes having a mean particle diameter in the range of 1 to 15 microns.
- 5. A dentifrice as in claim 1 in which said silicious abrasive is an amorphous alumino-silicate having a particle size of about 2 to 40 microns.
- 6. A dentifrice as in claim 1, wherein the salt is calcium carbonate and is present in amount of 1-5% by weight and the pH is about 7.8 to 8.0.
- 7. A dentifrice as in claim 1, wherein the salt is sodium bicarbonate and is present in amount of 1-5% by weight and the pH is about 8.3 to 8.9.
- 8. A dentifrice as in claim 1, wherein the salt is magnesium silicate and is present in amount of 1-5% by weight and the pH is about 8.1 to 8.5.
- 9. A dentifrice as in claim 1, wherein the salt is calcium chloride and is present in amount of 1-5% by weight and the pH is about 8.
Parent Case Info
This application is a continuation in part of copending patent application Ser. No. 544,618, filed January 28, 1975, now abandoned.
US Referenced Citations (12)
Continuation in Parts (1)
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Number |
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544618 |
Jan 1975 |
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