J.m. Huber Corporation

Evonik Operations Gmbh

The Procter Gamble Company

Evonik Degussa Gmbh

William Jackson Hagar

Karl William Gallis

Terry William Nassivera

Sanjeev Midha

Eva Schneiderman

Lawrence Edward Dolan

William C Fultz

Patrick D McGill

John M Cornelius

Ronald L Romer

Patrick McGill

Silica particles having a d50 median particle size from 8 to 20 μm, a sphericity factor (S) of at least 0.9, a BET surface area from 0.1 to 8 m/g, a total mercury intrusion pore volume from 0.35 to 0.8 cc/g, and a loss on ignition from 3 to 7 wt. %, are disclosed, as well as methods for making these silica particles, and dentifrice compositions containing the silica particles.

Spherical stannous compatible silica particles for reduced RDA

Silica particles having a BET surface area from 0.1 to 7 m/g, a pack density from 35 to 55 lb/ft, an Einlehner abrasion value from 8 to 25 mg lost/100,000 revolutions, a total mercury intrusion pore volume from 0.7 to 1.2 cc/g, and a stannous compatibility from 70 to 99%, are disclosed, as well as methods for making these silica particles.

Stannous compatible silica

Spherical silica and/or silicate particles having a d50 median particle size from 1 to 5 &#x3bc;m, a d95 particle size less than 8 &#x3bc;m, an oil absorption from 40 to 100 cc/100 g, a pack density from 20 to 60 lb/ft, and a sphericity factor (S) of at least 0.9, are disclosed, as well as methods for making these spherical particles, and dentifrice compositions containing the spherical particles.

Spherical silica for tubule occlusion

Dentifrice containing silica particles having a d50 median particle size from 4 to 25 &#x3bc;m, a BET surface area of less than 10 m/g, and a total mercury intrusion pore volume from 0.2 to 1.5 cc/g, are disclosed.

Dentifrice formulations having spherical stannous compatible silica particles for reduced RDA

Silica particles having a d50 median particle size of at least 6 &#x3bc;m, a ratio of (d90&#x2212;d10)/d50 from 1.1 to 2.4, a RDA at 20 wt. % loading from 40 to 200, and a sphericity factor (S80) of at least 0.9, are disclosed, as well as methods for making these silica particles, and dentifrice compositions containing the silica particles.

Spherical silica particle size for RDA control

A dentifrice composition containing an abrasive and a stannous ion source. The abrasive can contain precipitated silica particles where the extractable stannous ions after 30 days at 40&#xb0; C. is greater than about 75% of the initial extractable stannous ion concentration.

Dentifice compositions containing stannous compatible silica particles

Disclosed herein is a continuous process for preparing a silica product, comprising: (a) continuously feeding an acidulating agent and an alkali metal silicate into a loop reaction zone comprising a stream of liquid medium; wherein at least a portion of the acidulating agent and the alkali metal silicate react to form a silica product in the liquid medium of the loop reaction zone; (b) continuously recirculating the liquid medium through the loop reaction zone; and (c) continuously discharging from the loop reaction zone a portion of the liquid medium comprising the silica product. Silica products and dentifrice compositions comprising the silica products are also disclosed. A continuous loop reactor is also disclosed.

Continuous silica production process and silica product prepared from same

Treated silica materials are disclosed, together with methods of making such materials and dentifrice compositions comprising the treated silica materials.

Treated silicas and metal silicates for improved cleaning in dentifrice

Disclosed herein are architectural coating compositions comprising spheroid shaped silica or silicate. The compositions exhibit a number of improved properties and are useful on a variety of substrates.

Growing community of inventors

Perryville, MD, United States of America

William Jackson Hagar