Pigments
AssigneeBritish Titan Limited
InventorsJohn James Hinley, David Malcolm Porter
Life of this patent
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Abstract
Titanium dioxide pigments carrying diisopropanolamine have good dispersibility, minimum tendency to foaming, minimum retardation of drying time and develop high opacity without the requirement for the presence of water. Preferably, the pigments also carry one or more hydrous metal oxides, a phosphate and/or a silicate. The preferred method of manufacture of the pigmentary titanium dioxide is to dry mill the pigment in the presence of the diisopropanolamine.
Claims19
A pigmentary titanium dioxide the particles of which carry diisopropanolamine in an amount of from 0.05 to 2% by weight based on the weight of pigment.
A process for the treatment of pigmentary titanium dioxide comprising mixing pigmentary titanium oxide with diisopropanolamine in an amount such that the dry pigment carries 0.05 to 2% by weight diisopropanolamine based on the weight of pigment.
Dependencies are inferred from the claim text.