Patent EP-2682435-A1 (EP)
Inventor: BORST HANS-ULRICH
IPC: G03F7/00
Filed: 2013-06-24
Abstract: Metal-azo pigment comprising adduct of (a) at least two metal-azo compounds (I), and (b) at least one substituted 1,3,5-triazine derivative (II), is new. The metal-azo pigment exhibits a signal (S 1) with an intensity (I 1) in X-ray diffractogram at a lattice constant of 10.3+- 0.2 Å . The metal-azo pigment at a lattice constant of 16.05-11.78 Å , does not exhibit a signal (S 2) whose intensity (I 2) which is in proportion to the intensity (I 1) of signal (S 1), and is expressed as quotient (I 2/I 1) of background-corrected intensities, exceeds a value of 0.02. Metal-azo pigment comprising adduct of (a) at least two metal-azo compounds of formula (I) or their tautomeric forms, and (b) at least one substituted 1,3,5-triazine derivative of formula (II), is new. The metal-azo pigment exhibits a signal (S 1) with an intensity (I 1) in X-ray diffractogram at a lattice constant of 10.3+- 0.2 Å . The metal-azo pigment at a lattice constant of 16.05-11.78 Å , does not exhibit a signal (S 2) whose intensity (I 2) which is in proportion to the intensity (I 1) of signal (S 1), and is expressed as quotient (I 2/I 1) of background-corrected intensities, exceeds a value of 0.02. R1, R2 : OH, NH 2 or NHR5; R3, R4 : =O or =NR5; R5 : H or alkyl; M : di- or trivalent metal ion, preferably Ni 2> +>, Zn 2> +>, Cu 2> +>, (Al 3> +>) 2 / 3, Fe 2> +>, (Fe 3> +>) 2 / 3, Co 2> +> or (Co 3> +>) 2 / 3, where the amount of Zn 2> +> or Ni 2> +> is 95-100 mole%, the amount of Cu 2> +>, (Al 3> +>) 2 / 3, Fe 2> +>, (Fe 3> +>) 2 / 3, Co 2> +> or (Co 3> +>) 2 / 3 is 0-5 mole%, and the molar ratio of Zn- and Ni-metal ions in total compounds (I), is 9:1-1:9; and R6 : H or alkyl. Independent claims are also included for: (1) a pigment formulation comprising the above metal-azo pigment; (2) preparing the metal-azo pigment; (3) preparing the pigment formulation, comprising mixing the metal-azo pigment, the dispersing agent, and optionally at least one further pigment and at least one organic compound, preferably a terpene, terpenoid, fatty acid ester or a homo- or copolymer, and grinding the obtained mixture; (4) a color filter comprising the metal-azo pigment or the pigment formulation; (5) a photo-lacquer comprising at least one photocurable monomer, at least one photoinitiator and the metal-azo pigment or the pigment formulation; (6) producing the color filters for liquid crystal displays, comprising grinding the metal-azo pigment or the pigment formulation in an organic solvent optionally with the addition of a binder resin and/or dispersing agent, processing the ground mixture with the addition of a photocurable monomer, a photoreaction initiator and optionally a further binder and/or a solvent to obtain a photo-lacquer, applying the photo-lacquer on a substrate, preferably glass plate, by a coating method, preferably roller-, spray-, spin-, dip-, ink-jet- or air-knife coating, illuminating the coated substrate using a photomask, and curing to obtain the finished colored color filter; (7) the liquid crystal display comprising the color filter; and (8) use of the pigment formulation in printing inks for producing color filters by photolithography, offset printing or mechanical-, piezo-mechanical- or thermal ink-jet printing. [Image].