Abstract: Described is a black dichroic dye composition comprising 2 or more dyes, wherein at least one dye, generally a red dye and optionally a yellow dye, conforms to the formula A and at least one dye, usually a blue dye, conforms to the formula B Ar1—N?N—[Ar2—N?N—]qAr3—N?N—Ar4 (B) with symbols as defined in present claims. The dye composition is well suited for combination with liquid crystal material for use, inter alia, as polarizing film and/or in liquid crystal displays, showing, inter alia, high dichroic ratio and excellent compatibility with the LC material.

Abstract: A color filter comprising a cured layer of a photosensitive resist composition comprising a highly reactive polyacrylate monomer and a process for the preparation thereof are provided. The color filter is especially useful for low temperature applications such as electrophoretic displays, polymer dispersed liquid crystal displays, OLED devices and the like.

Abstract: A color filter comprising a cured layer of a photosensitive resist composition comprising a highly reactive polyacrylate monomer and an alkali soluble binder having a side chain containing an ethylenically unsaturated bond in the side chain and a process for the preparation thereof are provided. The color filter is especially useful for low temperature applications such as electrophoretic displays, polymer dispersed liquid crystal displays, OLED devices and the like.

Abstract: A composition, for producing dispersions, thermoplastic masses and/or color filters, comprising (a) a colorant of formula (1) wherein 20-100 mol % R1 are Br and 80-100 mol % R3 are H, especially of formula (Ib) and/or (Ic); (b) from 0 to 150% by weight, based on (a), of C. I. Pigment Red 144, 188, 190, 224, 242 or 2,4,6-trimethylphenylperylene diimide; (c) from 3 to 25% by weight, based on (a), of a di- or tri-azacyclopentylmethyl-substituted colorant (formulae given); (d) from 0 to 10% by weight, preferably from 0.01 to 8% by weight, based on the sum of (a) and (b), of an additionally sulfonated colorant of the same kernels as in (c); and (e) from 0 to 30% by weight, preferably from 3 to 25% by weight, especially from 5 to 20% by weight, based on (a), of a diketopyrrolopyrrole colorant substituted by at least one chain containing a plurality of nitrogen atoms (cf. formula (V)).

Abstract: The invention relates to an electrophoretic display, comprising electrodes and cells containing at least one kind of ionic, monochrome particles, a non-polar liquid and a dispersant, wherein the ionic, monochrome particles of at least one kind are essentially aggregates consisting of a carbon containing pigment and a cationic pigment orcationic pigment derivative, and the dispersantis selected from the group consisting of polyacrylates, polyesters, polyurethanes and copolymers, with the proviso that the cationic pigment or cationic pigment derivative is not a reaction product of carbonblack with diazotated procaine hydrochloride. In general, the whole quantity of the pigment and the main part, preferably at least 80%, most preferred from 95% to 100%, of the whole cationic pigment or cationic pigment derivative present within the cells is comprised in the aggregates, with essentially no pigment and only a minor part of the cationic pigment or cationic pigment derivative physically distinct from the aggregates.

Abstract: Actinically modifiable composition comprising, all based on the entire composition, 10-70% by weight of a colorant or a mixture of colorants; 90-30% by weight of actinically reactive binder material consisting of components selected from the group consisting of binders, binder precursors, dispersants, photoinitiators and stabilizers, although optionally from 0% 30% by weight of the actinically reactive binder material can be non-reactive components; and 0-10% by weight of further, non-reactive constituents; characterized in that the composition has an optical density ?1.0, preferably ?1.2 and more preferably ?1.4 in the entire wavelength range 430-650 nm per 1 ?m layer thickness; and the colorant or 50-100% by weight, preferably 60-100% by weight and more preferably 70-100% by weight of the colorant mixture comprises a colorant obtainable by reaction of a compound of the formula (I) with a compound of the formula (II) in a molar ratio of 1:2, in the presence of a catalyst having a pK value ?4.

Abstract: The invention relates to an electrophoretic display, comprising electrodes and cells containing at least one kind of ionic, monochrome particles, a non-polar liquid and a dispersant, wherein the ionic, monochrome particles of at least one kind are essentially aggregates consisting of a carbon containing pigment and an anionic pigment or anionic pigment derivative, and the dispersant is selected from the group consisting of polyacrylates, polyesters, polyurethanes and copolymers. In general, the whole quantity of the pigment and the main part, preferably at least 80%, most preferred from 95% to 100%, of the whole anionic pigment or anionic pigment derivative present within the cells is comprised in the aggregates, with essentially no pigment and only a minor part of the anionic pigment or anionic pigment derivative physically distinct from the aggregates.

Abstract: The present invention relates to the preparation and use of (colored) organic particles carrying electric charge as electrophoretic (image) displaying particles, to electrophoretic dispersions comprising the organic particles carrying electric charge, electrophoretic (image) devices (especially displays) comprising the colored organic particles carrying electric charge, to the novel functionalized particles, and to their use. The particles are obtainable according to a method represented by the reaction scheme as given in FIG. 1.

Abstract: A composition, for producing dispersions, thermoplastic masses and/or colour filters, comprising (a) a colourant of formula (1) wherein 20-100 mol % R1 are Br and 80-100 mol % R3 are H, especially of formula (Ib) and/or (Ic); (b) from 0 to 150% by weight, based on (a), of C. I. Pigment Red 144, 188, 190, 224, 242 or 2,4,6-trimethylphenylperylene diimide; (c) from 3 to 25% by weight, based on (a), of a di- or tri-azacyclopentylmethyl-substituted colourant (formulae given); (d) from 0 to 10% by weight, preferably from 0.01 to 8% by weight, based on the sum of (a) and (b), of an additionally sulfonated colourant of the same kernels as in (c); and (e) from 0 to 30% by weight, preferably from 3 to 25% by weight, especially from 5 to 20% by weight, based on (a), of a diketopyrrolopyrrole colourant substituted by at least one chain containing a plurality of nitrogen atoms (cf. formula (V)).

Abstract: Color filter comprising a surface-modified nanoparticle wherein a cationic colorant is covalently attached to the surface of said nanoparticle, a polymerizable mixture for making color filters, a surface-modified nanoparticle and its use.

Abstract: The invention relates to an electrophoretic display, comprising electrodes and cells containing at least one kind of ionic, monochrome particles, a non-polar liquid and a dispersant, wherein the ionic, monochrome particles of at least one kind are essentially aggregates consisting of a carbon containing pigment and a cationic pigment orcationic pigment derivative, and the dispersantis selected from the group consisting of polyacrylates, polyesters, polyurethanes and copolymers, with the proviso that the cationic pigment or cationic pigment derivative is not a reaction product of carbonblack with diazotated procaine hydrochloride. In general, the whole quantity of the pigment and the main part, preferably at least 80%, most preferred from 95% to 100%, of the whole cationic pigment or cationic pigment derivative present within the cells is comprised in the aggregates, with essentially no pigment and only a minor part of the cationic pigment or cationic pigment derivative physically distinct from the aggregates.

Abstract: The invention relates to an electrophoretic display, comprising electrodes and cells containing at least one kind of ionic, monochrome particles, a non-polar liquid and a dispersant, wherein the ionic, monochrome particles of at least one kind are essentially aggregates consisting of a carbon containing pigment and an anionic pigment or anionic pigment derivative, and the dispersant is selected from the group consisting of polyacrylates, polyesters, polyurethanes and copolymers. In general, the whole quantity of the pigment and the main part, preferably at least 80%, most preferred from 95% to 100%, of the whole anionic pigment or anionic pigment derivative present within the cells is comprised in the aggregates, with essentially no pigment and only a minor part of the anionic pigment or anionic pigment derivative physically distinct from the aggregates.

Abstract: The present invention relates to a process for the preparation of a mixture comprising at least two structurally different diketopyrrolopyrrole pigments of formula wherein A1 and A2 are each independently of the other an aromatic or heteroaromatic radical, by reacting a succinic acid ester with at least one unsubstituted or substituted aromatic or heteroaromatic nitrile, which process comprises carrying out the reaction in the presence of at least one compound of formula wherein A is an aromatic or heteroaromatic radical, R3 is hydrogen, halogen, methyl, methoxy, —CF3 or —CN, R4 is a linear or, from C3 upwards, optionally branched C1-C30alkyl, C6-C10aryl or C6-C24aralkyl radical, X is —S—, —O—, —CR5R5?—, —COO—, —CONR5—, —SO—, SO2—, —SO2NR5— or —NR5— and R5 and R5? are each independently of the other hydrogen or a linear or, from C3 upwards, optionally branched C1-C30alkyl, C6-C10aryl or C6-C24aralkyl radical, to the use of such a mixture in the coloring of organic material and in cosmetics, and al

Abstract: The present invention relates to a photosensitive resist composition comprising a colorant. More specifically, it relates to a photosensitive resist composition which is advantageously used for the production of a color filter for use in electronic paper displays devices, color image pick-up elements and the like.

Abstract: The present invention relates to the use of polymerisable diketopyrrolopyrroles in colour filters, which can themselves be used for example in electro-optical systems such as TV screens, liquid crystal displays, charge coupled devices, plasma displays or electroluminescent displays and the like. In contrast to conventional pigments the polymerisable diketopyrrolopyrroles do not tend to aggregate and, hence, show very good dispersibility. Color filters prepared by using the polymerisable diketopyrrolopyrroles have high transparence and pure hue. In addition, they facilitate adjustment of color points and enable a large choice of shades.

Abstract: The invention relates to novel liquid crystal displays comprising a broad backlight emission around 530 nm and a green color filter containing a phthalocyanine colorant, most adequately tetrahydroxy- or tetraalkoxy-substituted but lacking solubilizing groups.

Abstract: The present invention relates to a process for the preparation of a mixture comprising at least two structurally different diketopyrrolopyrrole pigments of formula wherein A1 and A2 are each independently of the other an aromatic or heteroaromatic radical, by reacting a succinic acid ester with at least one unsubstituted or substituted aromatic or heteroaromatic nitrile, which process comprises carrying out the reaction in the presence of at least one compound of formula wherein A is an aromatic or heteroaromatic radical, R3 is hydrogen, halogen, methyl, methoxy, —CF3 or —CN, R4 is a linear or, from C3 upwards, optionally branched C1-C30alkyl, C6-C10aryl or C6-C24aralkyl radical, X is —S—, —O—, —CR5R5?—, —COO—, —CONR5—, —SO—, SO2—, —SO2NR5— or —NR5— and R5 and R5? are each independently of the other hydrogen or a linear or, from C3 upwards, optionally branched C1-C30alkyl, C6-C10aryl or C6-C24aralkyl radical, to the use of such a mixture in the colouring of organic material and in cosmetics, and a

Abstract: The present invention relates to a process for the preparation of a mixture comprising at least two structurally different diketopyrrolopyrrole pigments of formula (1) wherein A1 and A2 are each independently of the other an aromatic or heteroaromatic radical, by reacting a succinic acid ester with at least one unsubstituted or substituted aromatic or heteroaromatic nitrile, which process comprises carrying out the reaction in the presence of at least one compound of formula (2) wherein A is an aromatic or heteroaromatic radical, R3 is hydrogen, halogen, methyl, methoxy, —CF3 or —CN, R4 is a linear or, from C3 upwards, optionally branched C1-C30alkyl, C6-C10aryl or C6-C24aralkyl radical, X is —S—, —O—, —CR5R5?—, —COO—, —CONR5—, —SO—, SO2—, —SO2NR5— or —NR5— and R5 and R5? are each independently of the other hydrogen or a linear or, from C3 upwards, optionally branched C1-C30alkyl, C6-C10aryl or C6-C24aralkyl radical, to the use of such a mixture in the coloring of organic material and in cosmetics, and also t

Abstract: The present invention relates to the use of polymerisable diketopyrrolopyrroles in colour filters, which can themselves be used for example in electro-optical systems such as TV screens, liquid crystal displays, charge coupled devices, plasma displays or electroluminescent displays and the like. In contrast to conventional pigments the polymerisable diketopyrrolopyrroles do not tend to aggregate and, hence, show very good dispersibility. Color filters prepared by using the polymerisable diketopyrrolopyrroles have high transparence and pure hue. In addition, they facilitate adjustment of color points and enable a large choice of shades.

Abstract: The present invention relates to high-molecular-weight polymeric material comprising at least one diketopyrrolopyrrole pigment of formula (1) wherein R1, is hydrogen, chlorine, methyl, methoxy, CF3 or CN, R2 is hydrogen, chlorine, methyl, methoxy, CF3 or CN, A is hydrogen, chlorine, methyl, mehtoxy, CF3, CN, unsubstituted or substituted phenyl or a radical of formula (2), (2a) or (2b), wherein R5 is hydrogen, chlorine, methyl, methoxy, nitro, CF3 or CN and R6 is hydrogen, chlorine, methyl, methoxy, nitro, CF3 or CN, or R5 and R6 together with the phenyl ring to which they are bonded form an aryl or a heteroaryl and A1 is a radical of formula (2), (2a) or (2b), to the preparation of that material and to the use thereof in colour filters, and to novel diketopyrrolopyrrole pigments.