Composite pigment
AssigneeCiba Specialty Chemicals Corporation
InventorLaurent Chassot
Life of this patent
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Abstract
A composite pigment, which consists of a colourant and a substrate, using a substrate (S) and a colourant (C), which are each coated with ions or ionisable compounds having a charge rotating in the same direction, and, if desired, of additional ions or ionisable compounds having a change rotating in the same direction as layer material (L), wherein either (I) the sign of the change of the coating of S, or the sign of the charge of the coating of S and of the charge of L, which is the same, is opposite to that of charge of the coating of C, or (II) the sign of charges of the coatings of S and C is the same and is opposite to that of the charge of L.
Claims12
A composite pigment comprising a substrate (S) and a colorant (C), wherein the substrate (S) and the colorant (C) are each coated with ions or ionizable compounds having either a positive charge or a negative charge and, optionally, further coated with ions or ionizable compounds, as layer material (L), having either a positive charge or a negative charge and wherein either:
- (I) the charge of the coating of S is opposite to the charge of the coating of C and if layer material (L) is present then the charge of the coating of S and the charge of layer material (L) are the same;
- or
- (II) where the charge of the coating of S and the charge of the coating of C are the same and layer material (L) is present then the charge of the coating of S and the charge of the coating of C are opposite to the charge of layer material (L) and;
- wherein the colorant (C) is an organic pigment selected from the group consisting of azo pigments, naphthene pigments, benzimidazole pigments, disazo condensation pigments, metal complex pigments, isoindolinone pigments, isoindoline pigments, indigo, quinophthalone pigments, dioxazine pigments, polycyclic pigments, phthalocyanine, perylene, perinone pigments, thioindigo pigments, anthraquinone pigments, anthrapyrimidine, indanthrone, flavanthrone, pyranthrone, anthanthrone, isoviolanthrone pigments and diketopyrrolopyrrole (DPP) pigments.
Dependencies are inferred from the claim text.