Kaolin pigment products

Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...

Reexamination Certificate

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Details

C106S416000, C106S484000, C106S487000, C162S181800, C241S006000

Reexamination Certificate

active

07597755

ABSTRACT:
A pigment product for use in a coating composition to provide a gloss coating on paper, the pigment product comprising a processed particulate kaolin having a particle size distribution such that at least about 80% by weight of the particles have an equivalent spherical diameter less than about 2 p,m and in the range of from about 10% to about 20% by weight of the particles have an equivalent spherical diameter less than about 0.25 wm, the particles have a shape factor in the range of from about 20 to about 36 and the particles have a particle steepness in the range of about greater than about 35, more preferably in the range of about 35 to about 40, and wherein the kaolin is derived from a secondary kaolin source.

REFERENCES:
patent: 5089056 (1992-02-01), Shi et al.
patent: 5169443 (1992-12-01), Willis et al.
patent: 6003795 (1999-12-01), Bown et al.
patent: 6284034 (2001-09-01), Hiorns et al.
patent: 6402826 (2002-06-01), Yuan et al.
patent: 2003/0177952 (2003-09-01), Cummings et al.
patent: 2004/0250973 (2004-12-01), Johns et al.
patent: 0 863 951 (2002-04-01), None
patent: WO 99/51815 (1999-10-01), None
patent: WO 00/32699 (2000-06-01), None
patent: WO 00/59840 (2000-10-01), None
patent: WO 00/66510 (2000-11-01), None
patent: WO 02/16511 (2002-02-01), None

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