Dispersion
AssigneeZeneca Limited
InventorMark Holbrook
Life of this patent
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Abstract
A dispersion of a finely divided pigment in a composition of water, one or more water-compatible resins and, as dispersant, a polycyclic aromatic compound having a water-solubilising poly(C.sub.2-4 -alkyleneoxy) chain containing from 3 to 50 alkyleneoxy groups, characterised in that the dispersion contains from 3% to 30% by weight or resin with respect to the total weight of water and resin in the dispersion. The dispersion is suitable for the preparation of water-borne paint and inks.
Claims9
An aqueous mill-base for water-borne paints and inks comprising a finely divided pigment in a composition of water, one or more water-insoluble resins and, as dispersant, a polycyclic aromatic compound having a water-solubilising poly(C.sub.2-4 -alkyleneoxy) chain containing from 3 to 50 alkyleneoxy groups, characterised in that the dispersion contains from 3% to 30% by weight of resin with respect to the total weight of water and resin in the dispersion, said mill-base being obtained by grinding the pigment in an aqueous dispersion with the resin and dispersant.
An aqueous suspension of unmilled pigment containing one or more water-insoluble resins and a polycyclic aromatic compound having a water-solubilising poly(C.sub.2-4 -alkyleneoxy) chain containing from 3 to 50 alkyleneoxy groups.
Dependencies are inferred from the claim text.