Modified abrasive system for dentifrices

• US 4,187,288 A
• Filed: 10/04/1978
• Issued: 02/05/1980
• Est. Priority Date: 01/28/1975
• Status: Expired due to Term

• Current Assignee: Colgate-Palmolive Company
• Original Assignee: Colgate-Palmolive Company
• Inventors: Norfleet, James, Cordon, Martin
• Primary Examiner(s): Rose, Shep K.
• Application Number:
  US05/948,606
• Time in Patent Office: 489 Days
• Field of Search: 424/49-58
• US Class Current: 424/49
• CPC Class Codes: A61K 2800/412 Microsized, i.e. having sizes between 0.1 and 100 microns
• CPC Class Codes: A61K 8/26 Aluminium; Compounds thereof
• CPC Class Codes: A61K 8/27 Zinc; Compounds thereof
• CPC Class Codes: A61Q 11/00 Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses

Abstract

Dentifrice possessing superior cleaning and polishing characteristics containing as the essential ingredients at least one hard abrasive in an amount to provide a radioactive enamel abrasion to the dentifrice of above about 400, such as calcined alumina, zirconium silicate, and the like, and a non-toxic zinc compound in an amount to provide at least about 0.0065% by weight of zinc to the dentifrice.

Claims

1. A toothpaste or dental cream of superior cleaning and polishing characteristics comprising an aqueous humectant containing dental vehicle and an abrasive system having at least one hard abrasive having a particle size of about 1 to 15 microns in diameter selected from the group consisting of calcined alumina, zirconium silicate, feldspar, pumice, and ZrO₂, and in an amount to provide a radioactive enamel abrasion value to the dentifrice of above about 400 and present in an amount of at least 7.5% and up to 20% by weight of the dentifrice, and including an additional softer dental abrasive having a particle size of 2-40 microns and in an amount of about 10-50% by weight, said dental vehicle containing a non-toxic zinc compound in an amount to provide at least about 0.0065% zinc to the dentifrice, said zinc compound selected from the group consisting of zinc chloride, zinc sulfate, zinc acetate, zinc nitrate, and zinc oxide in an amount of about 0.01-2.0% by weight of the dentifrice, so as to reduce the enamel abrasion of the dentifrice.

2. A dentifrice in accordance with claim 1, wherein the zinc compound is zinc oxide.

3. A dentifrice in accordance with claim 1, wherein the zinc compound is zinc chloride.

4. A dentifrice in accordance with claim 1, wherein the zinc compound is zinc sulfate.

5. A dentifrice as in claim 1 in which said hard abrasive is calcined alumina in the form of alpha alumina flakes having an average diameter in the range of 2 to 7 microns.

6. A dentifrice as in claim 1 in which said hard abrasive is zirconium silicate.

7. A dentifrice as in claim 1, in which the soft abrasive is sodium alumino-silicate.

8. A dentifrice as in claim 1, wherein the hard abrasive is calcined alumina.