Dyed hectorite pigments and applications
AssigneeJ. M. Huber Corporation
InventorDavid H. Durham
Life of this patent
Estimating the term…
Abstract
A coloring pigment useful for coloring or tinting inks, paints, plastics and rubber comprises the reaction product of a cationic organic dye and a hectorite mineral, the hectorite mineral having a small average particle size and a high cation exchange capacity. The pigment has excellent color strength and does not bleed in water or oil and is easily dispersable in aqueous and organic media.
Claims12
A paint containing as a coloring agent a coloring pigment which comprises the reaction product of a cationic organic dye and a sheared, sodium exchanged McDermitt, Nevada calcium magnesium hectorite, said hectorite mineral having an average particle size of 0.1 to 0.6 microns, a generally square or plate-like morphology and high cation exchange capacity in the range of 110 to 150 milliequivalents per 100 grams of dry hectorite, and a charge density yielding a greater than 28.5 angstroms D(001) spacing as measured by x-ray diffraction.
A printing ink which contains as a coloring agent a coloring pigment which comprises the reaction product of a cationic organic dye and a sheared, sodium exchanged McDermitt, Nevada calcium magnesium hectorite, said hectorite mineral having an average particle size of 0.1 to 0.6 microns generally square or plate-like morphology, a high cation exchange capacity in the range of 100 to 150 milliequivalents per 100 grams of dry hectorite and a charge density yielding a greater than 28.5 angstroms D(001) spacing as measured by x-ray diffraction.
A paper or paperboard which has been printed with a printing ink which contains a coloring pigment which comprises the reaction product of a cationic organic dye and a sheared, sodium-exchanged McDermitt, Nevada calcium magnesium hectorite, said hectorite mineral having an average particle size of 0.1 to 0.6 microns, a generally square or plate-like morphology, a high cation exchange capacity in the range of 100 to 150 milliequivalents per 100 grams of dry hectorite and a charge density yielding a greater than 28.5 angstroms D(001) spacing as measured by x-ray diffraction.
Dependencies are inferred from the claim text.