Cationic polyoxometalate-coated alumina trihydrate dispersants
AssigneeJ.M. Huber Corporation
InventorGlenn R. Evers
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Abstract
The present invention relates to polyoxometalate-coated alumina trihydrate dispersants prepared by combining a polyaluminum chloride having certain characteristics with alumina trihydrate particles. Such dispersants are useful for forming cationic alumina trihydrate slurries, which can be mixed with titanium dioxide to produce stable cationic slurry blends useful in paper, paper-board, and paint (coatings) applications. The dispersants are also useful for preparing cationic titanium dioxide slurries.
Claims21
A cationic polyoxometalate-coated alumina trihydrate dispersant (Cationic POM Dispersant) comprising a reaction product of:
- a. a polyaluminum chloride having a basicity of about 20% to about 40% and an Al2O3 content of about 10 wt. % to about 17 wt. %;
- and
- b. crystalline alumina trihydrate (ATH) particles;
- wherein the cationic POM dispersant has a pH of ≦2.5.
A method of making a cationic polyoxometalate-coated alumina trihydrate dispersant (Cationic POM Dispersant) comprising combining a polyaluminum chloride having a basicity of about 20% to about 40% and an Al2O3 content of about 10 wt. % to about 17 wt. % with crystalline alumina trihydrate (ATH) particles, wherein the resulting cationic POM dispersant has a pH of 2.5.
Dependencies are inferred from the claim text.