Composite pigmentary material
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United States of America Patent
Stats
-
Feb 9, 1999
Grant Date -
N/A
app pub date -
Feb 3, 1997
filing date -
Feb 3, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A structured composite pigmentary material comprises composite particles consisting of an association of at least one titanium dioxide particle and at least one non-film-forming organic polymer particle wherein the particles are held in association as a result of a positive surface charge on the titanium dioxide particles and a negative surface charge on the polymeric particles, the composition of the composite being such that the ratio by volume of polymeric particles to titanium dioxide particles is in the range 0.3:1 to 0.6:1. An aqueous paint composition and a method of preparing the structured composite pigmentary material are described.
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