Encapsulated pigments
AssigneeMerck Patent GmbH
InventorsThomas Rathschlag, Veronika Hochstein, Carsten Griessmann, Sabine Schoen
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Abstract
Described are encapsulated pigments having an outer water-soluble shell and a core containing organic and/or inorganic pigments and optionally solvents and/or conventional additives. The encapsulated pigments have very good dissolution rates in aqueous systems and are therefore particularly suitable for paints, coatings, printing inks, in papermaking and in cosmetic formulations.
Claims16
An encapsulated pigment comprising an outer water-soluble shell, said shell comprising a water-soluble film former of polyvinyl alcohol (PVOH) encapsulating a core, said core comprising at least one effect pigment which is a pearlescent pigment or a multilayered pigment based on SiO2 flakes, glass flakes, or TiO2flakes, and, optionally, one or more solvents and/or conventional additives.
An encapsulated pigment comprising an outer water-soluble shell, said shell comprising a water-soluble film former having an acid number of from 90 to 350 mg of KOH/g, encapsulating a core, said core comprising at least one organic and/or inorganic pigment and, optionally, one or more solvents and/or conventional additives, wherein the outer water-soluble shell has a thickness of 0.01-1.0 mm.
Dependencies are inferred from the claim text.