Cationically stabilized slurries of calcined kaolin clay

Details Cationically stabilized slurries of calcined kaolin clay Cationically stabilized slurries of calcined kaolin clay

1994-10-19

1996-07-23

Group, Karl

Compositions: coating or plastic

Materials or ingredients

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

106416, 106486, 501147, 501148, C04B 1410

Patent

active

055379346

ABSTRACT:
A method for preparing high solids suspensions of calcined clay which are stable without the necessity of adding a colloidal thickening agent and have minimal dilatancy. A calcined kaolin clay pigment, substantially free of anionic dispersant, is dispersed in water by addition of alkali to provide a neutral to mildly alkaline aqueous slurry. To the dispersed slurry, a water-soluble cationic organic polymer is added in minor amounts, to partially flocculate and thicken the slurry, thereby stabilizing the slurry against sedimentation.

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Grimshaw "The Chemistry & Physics of Clays and Allied Ceramic Materials", Fourth edition, Wiley-Interscience, N.Y, 1971, p. 473.

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