Composite abrasive material for oral compositions, and methods of making and using same
AssigneeJ. M. Huber Corporation
InventorsJohn M. Cornelius, Michel J. Martin
Life of this patent
Estimating the term…
Abstract
A composition of matter comprising particles of silica, where the silica particles have surfaces at which condensed phosphate is retained, and a production methodology therefor. Oral compositions containing this composition of matter are also presented, which are endowed with enhanced cleaning efficacy.
Claims9
A composition of matter comprising particles of precipitated silica, where the precipitated silica particles have surfaces at which condensed alkali metal phosphate is retained, wherein the composition comprises about 30 to about 99.9 wt % precipitated silica and from about 0.1 to about 70 wt % condensed alkali metal phosphate, and wherein the precipitated silica particles have an average particle size between about 0.1 to about 80 μm, a void volume value in the range of about 1.0 to about 4.0 cc/g, and an acceptable Einlehner abrasion value.
A composition of matter comprising particles of precipitated silica, where the precipitated silica particles have surfaces at which condensed alkali metal phosphate is retained, wherein the precipitated silica particles are obtained from a dispersion of a wet cake of precipitated silica in an aqueous solution containing a dissolved alkali metal salt of a condensed phosphate whereupon the dispersion is spray dried effective to provide the association of condensed alkali metal phosphate to the surfaces of the precipitated silica particles, wherein the composition comprises about 30 to about 99.9 wt % precipitated silica and from about 0.1 to about 70 wt % condensed alkali metal phosphate, and wherein the precipitated silica particles have an average particle size between about 0.1 to about 80 μm, a void volume value in the range of about 1.0 to about 4.0 cc/g, and an acceptable Einlehner abrasion value.
Dependencies are inferred from the claim text.