TH4156B - Pyrophosphate coating process for use with calcium carbonate dental abrasives. - Google Patents

Abstract

Calcium carbonate particles are coated with a pyrophosphate derivative. This invention included coated particles. Preparation method And use in mouth hygiene products

Claims (8)

1. An abrasive that is a processed type of calcium carbonate, which is the product of a method that contains Exposure to fine calcium carbonate with an average particle size of 0.2 to 30 μm / in liquid diffusion form with an alkali metal pyrophosphate source at reactive temperatures for derivative purposes. Selected pyrophosphates from the group containing these substances chemically adsorbed on the surface of the calcium carbonate particles at approximately .42-21 percent by weight of P2O5 compared to the weight of the abrasive. Total 2. Abrasive of claim 1 where the amount of P2O5 ranges from approx. 84% to 12% by weight as opposed to total weight 3. Abrasive of claim 1 where the quantity of P2O5 is in the range. From approx. 21 percent to 10.5 percent by weight 4. The abrasive of claim 1, with the average particle size ranging from approximately 2 microns to 20 microns. Phosphates were selected from a group containing sodium pyrophosphate and potassium pyrophosphate. 6. Polishing agent of claim 1, in which the pyrophosphate source is Pyrophosphate of mixed alkali metals 7. Polishing agent of claim 1, in which pyrophosphate derivatives are Calcium pyrophosphate 8. Polishing agent of claim 1, in which pyrophosphate derivatives are Calcium-Alkali Metal Pyrophosphate 9. Method for preparing abrasives coated with pyrophosphate. It consists of a fine-grained calcium carbonate classified as un-halogenated with an average particle size of 0.2-20 microns in liquid diffusion form to come into contact with a metal pyrophosphate source. Alkali at reactive temperature To make a chemically adsorbed pyrophosphate derivative on the surface of the calcium carbonate particles at an amount of approx. 42-21 percent by weight of P2O5 compared to the weight of all abrasives 1 0. Of claim 9, where the amount of pyrophosphate derivatives on calcium carbonate ranges from approx. 84% to 12% by weight 1 1. Method of claim 10 in which the content of pyrophosphate derivatives on calcium carbonate ranges from 2.1 percent to 10.5 percent by weight 1. 2. Method of claim 11, in which the pyrophosphate source is disodium dihydrogen pyrophosphate 1. 3. Method of claim 11, in which the pyrophosphate source is tetrosodium pyrophosphate 1. 4. Oral hygiene products containing calcium carbonate abrasives coated with calcium-alkali pyrophosphate derivatives in amounts ranging from approximately 5 percent to approximately 95 percent. By weight 1 5. Oral Hygiene Product of Claim 14, which contains an additional fluoride-type compound in amounts to provide 300 to 2,000 ppm of fluoride released. 1 6. Oral hygiene products of claim 15, where the amount of calcium pyrophosphate derivatives coated on calcium carbonate ranges from approximately 5 percent to 25 percent by weight 1. 7. Oral Hygiene Product of Clause 16, which pyrophosphate derivatives are selected from the group that includes: CaNa2P2O7-4H2O And a mixture of this substance 1 8. Oral Hygiene Product of Clause 16, for which pyrophosphate derivatives are selected from the class containing calcium pyrophosphate and their mixtures.