Classified silica for improved cleaning and abrasion in dentifrices

Abstract

There is provided a method of making a precipitated silica abrasive composition having excellent cleaning performance and low abrasiveness, the method comprising post-reactor classification of abrasive particles by air classification techniques. By setting a specific particle size range, higher levels of film cleaning can be determined without increasing the dentin abrasive properties of the silica product itself. Accordingly, it is possible to provide dentifrices comprising the classified abrasive silica products which have particularly desirable cleaning benefits for improved tooth polishing, whitening, etc., without detrimental effects on tooth hard surfaces. The invention also includes the products resulting from the selective treatment process and dentifrices comprising the graded silica products.

Description

field of invention

[0001] The present invention relates to a method of making abrasive compositions, and more particularly to a method of making precipitated silica abrasive compositions having excellent cleaning performance and lower abrasiveness, the method comprising passing through air classification techniques Post-reactor sizing is performed on the abrasive particles in operation. By setting a specific particle size range, it is believed that higher levels of pellicle film cleaning can be achieved without enhancing the dentin abrasive properties of the silica product itself. Accordingly, dentifrices comprising the graded abrasive silica products can be provided which have particularly desirable cleaning benefits to enhance tooth polishing, whitening, etc., without deleterious effects on tooth hard surfaces. Furthermore, the invention also includes the products resulting from this selective treatment process and dentifrices comprising this graded silica product. Backgr...