Stauffer Chemical Company

Frances C Benkwitt

Fawzy G Sherif

Miguel Coll-Palagos

Robert Querido

Henri Monty

Dicalcium phosphate dihydrate compositions having improved monofluorophosphate compatibility are prepared by adding pyrophosphoric acid to the dicalcium phosphate reactor, terminating the reaction by which the dicalcium phosphate is formed at a pH ranging from 4.9 to 5.5 and blending the final product with a stabilizing agent.

Dicalcium phosphate dihydrate having improved monofluorophosphate

A formulation which consists essentially of from about 20%, by weight, to about 87%, by weight, zinc oxide, from about 13% to about 80%, by weight of a selected type of acidic pH adjuster, and from about 0% to about 7%, by weight, of trimagnesium phosphate, when incorporated in fluorine-containing toothpaste formulations which also contain at least one compound selected from the group consisting of an insoluble alkali metal metaphosphate and calcium pyrophosphate, yields a smooth paste having a pH of from about 5.5 to about 6.8 which will not corrode the inside of unlined aluminum tubes containing such a formulation. When the components of the formulation are based on the weight of the entire toothpaste formulation, said zinc oxide can be present at from about 0.05% to about 2.0%, the acidic pH adjuster can be present at from about 0.05% to about 3.0%, and the trimagnesium phosphate can be present at from about 0% to about 0.5%.

Anti-corrosion formulation for toothpastes

Plaque formation can be inhibited by contacting teeth with the compounds formed by reacting a long chain aliphatic alkylene amine and trimetaphosphoric acid. The antiplaque inhibitors can be incorporated in a variety of oral preparations, including dental creams, mouthwashes, and the like.

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Yonkers, NY, United States of America

Frances C Benkwitt