Zirconium modified synthetic alkali metal silicate pigment and m

Details Zirconium modified synthetic alkali metal silicate pigment and m Zirconium modified synthetic alkali metal silicate pigment and m

1997-11-21

1998-09-29

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

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

10628719, 1062864, 1621641, 523 1, C08K 300

Patent

active

058141430

ABSTRACT:
A synthetic alkali metal silicate pigment is modified with a source of a water soluble zirconium ion to form an oxy-hydroxy zirconium species precipitate on the pigment surface. The surface modified pigment is made by slurrying the pigment and reacting it with the source of a water soluble zirconium ion. The surface modified pigment provides improvements over conventional synthetic alkali metal silicate pigments in terms of optical properties, particularly in paper applications, and physical properties, particularly in rubber applications. The surface modified pigment is also useful as an extender or replacement for TiO.sub.2, a conventional synthetic alkali metal silicate such as a sodium-aluminosilicate pigment, a clay, a calcined clay or the like.

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P.J. Moles, "Zirconium Compounds Find New Uses in Surface Coatings", Modern Paint and Coatings, Feb. 1988, pp. 36-39.
"Zirconium Oxycholoride Solution (ZOC)", CAS No. 7699-43-6, Apr. 1985.
"AZC and Bacote 20 Ammonium Zirconium Carbonate Solutions (AZC/AZS)", CAS No. 68309-95-5, Apr. 1985.

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