Pigment products
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United States of America Patent
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Sep 9, 2003
Grant Date -
N/A
app pub date -
Oct 4, 2000
filing date -
Apr 4, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pigment product suitable for use in a coating composition to provide a gloss coating on paper, the pigment product comprising a processed particulate kaolin whose particles have a particle size distribution such that at least 80% by weight of the particles have an equivalent spherical diameter less than 2 .mu.m and not less than 8%, preferably not less than 12%, by weight of the particles have an equivalent spherical diameter less than 0.25 .mu.m and whose particles have a shape factor of at least 45, preferably at least 50.
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