Lever Brothers Company

Dominick F DeMasi

John J Miles, Jr

Gregg S Scheideler

A process is provided for the rapid wetting and dispersing of powders suitable for obtaining an essentially gas-free paste, particularly in the manufacture of toothpaste compositions. The process consists of charging a vacuum mixer with the appropriate liquids, and subjecting the liquids to a continuous vacuum that will draw the powders in at the bottom of the mixer in an area of high turbulence generated by a high speed mixing device. The turbulence caused by the expanding air entrained in the powder as it enters the vacuum and generated by the impeller of a high speed mixer, wets the powders very rapidly, inhibits the formation of undesirable lumps, and essentially minimizes loss of powders to the vacuum system. In addition, little or no air is entrained in the resulting paste.

Method for wetting and dispersing powders

A process is presented for dispersing hydrophilic gums swiftly into formulations containing water wherein the lumping problem is avoided. The method of obtaining lump-free aqueous gum compositions comprises:

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Norwood, NJ, United States of America

Dominick F DeMasi