Structured pigment compositions, methods for preparation and use

Details Structured pigment compositions, methods for preparation and use Structured pigment compositions, methods for preparation and use

1994-06-23

1996-09-03

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106416, 106450, 106464, 106468, 106486, 106DIG4, 162135, 1621818, 428402, 428403, 501141, 501144, C04B 1404

Patent

active

055519750

ABSTRACT:
Pigments for use in paper are comprised of structured aggregate clays which are reaction products of kaolin clays and colloidal silicas. Silica modified clays of low treatment level can under certain high-shear mixing conditions be attritioned back to their starting clay particle size consequently yielding silica coated clay particles that provide unique properties. Also provided are structured aggregate clay products produced by the reaction of kaolin clay, colloidal silicas and spacer particles such as titanium dioxide, which products have improved porosity and light scattering characteristics. Also provided are clay slurry products which comprise mixtures of the reaction product of kaolin clay and colloidal silica, and optionally titanium dioxide, blended with other clay products.

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patent: 5167707 (1992-12-01), Freeman et al.
patent: 5186746 (1993-02-01), Freeman
patent: 5352287 (1994-10-01), Wason et al.

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