Granted Patent B2

US 7,144,475 · App. 10/622,619 · Granted Dec 5, 2006

Abstract

Claims (7)

1. A method of making a coated paper comprising:

providing a paper substrate;

preparing a coating formulation including a cationic slurry comprising an alumina pigment, a wetting agent and a cationic interfacial modifier, wherein said alumina pigment is present at about 35 to about 45 percent by weight of said slurry, said wetting agent is present at about 0.5 to about 5 percent by weight of said slurry and said cationic interfacial modifier is present at about 2 to about 15 percent by weight of said slurry, wherein said cationic slurry has a total solids content of about 42 to about 72 percent by weight; and

applying said coating formulation to at least one side of said paper substrate at a coat weight of about 2 to about 8 pounds per 3,300 square feet.

2. The method of claim 1 wherein said wetting agent is selected from the group consisting of monohydric alcohols, polyhydric alcohols, polyalcohols, polyols, facetylenic alcohol and combinations thereof.

3. The method of claim 1 wherein said cationic interfacial modifier includes at least one of a cationic dispersants and a cationic surfactants.

4. The method of claim 1 wherein said cationic interfacial modifier includes at least one of an aluminum hydroxychloride, a quaternary ammonium and an inorganic oligomer.

Assignments (22)