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An improved process for producing a aggregated kaolin pigment having desired physical and optical characteristics when used as a coating, filler or pigment in paper. The aggregated pigment is produced by contacting a substantially dry fine particle size kaolin with a previously hydrolyzed organic si

An improved process for producing a aggregated kaolin pigment having desired physical and optical characteristics when used as a coating, filler or pigment in paper. The aggregated pigment is produced by contacting a substantially dry fine particle size kaolin with a previously hydrolyzed organic silicon compound, such as hydrolyzed tetraethoxysilane, and then recovering the aggregated kaolin pigment.

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A method for producing a chemically aggregated kaolin pigment providing enhanced optical and printability properties when used in paper manufacture, which comprises contacting a substantially dry fine particle size feed kaolin with a solution of an aggregating agent comprising a previously hydrolyze

A method for producing a chemically aggregated kaolin pigment providing enhanced optical and printability properties when used in paper manufacture, which comprises contacting a substantially dry fine particle size feed kaolin with a solution of an aggregating agent comprising a previously hydrolyzed organic silicon compound selected from the group consisting of symmetric compounds having the formula [Figure] where R=CH3, C2H5, C3H7, n--C4H9 sec-C4H9 and C6H5 and asymmetric compounds having the formula [Figure] [Figure] and [Figure] where R=C2H5, X=Cl or Br, and R′=H, and recovering an aggregated particulate kaolin pigment as product.