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Metal azo pigments and pigment preparations produced from same, and production method and use thereof

A metal azo pigment technology, applied in the field of metal azo pigments, can solve the problems of unsatisfactory brightness and color purity requirements

Active Publication Date: 2014-01-22
LANXESS DEUTDCHLAND GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] These known pigments and pigment preparations produced using them are still unsatisfactory with regard to all brightness and color purity requirements related to the color filters produced using them

Method used

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  • Metal azo pigments and pigment preparations produced from same, and production method and use thereof
  • Metal azo pigments and pigment preparations produced from same, and production method and use thereof
  • Metal azo pigments and pigment preparations produced from same, and production method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0275] Example 1: Preparation of Pigment A (non-inventive (non-inventive)):

[0276] Azobarbituric acid (0.3 mol) prepared according to Guideline 1 was mixed with 1500 g of distilled water at 82 °C. Thereafter 75.7 g of melamine (0.6 mol) were introduced. Then 0.3 mol of about 30% strength zinc chloride solution was added dropwise. After 3 hours at 82°C, the pH was adjusted to about 5.5 using KOH. Then dilute with about 300 g of distilled water at 90°C. Then 34 g of 30% strength hydrochloric acid were added dropwise and a temperature of 90° C. was fixed for 12 hours. Thereafter the pH was adjusted to about 5 using aqueous potassium hydroxide solution. The pigment is then separated on a suction filter, washed, dried in a vacuum oven at 80° C., and ground in a standard laboratory mill for about 2 minutes. (Pigment A = adduct of zinc azobarbiturate and melamine).

Embodiment 2

[0277] Example 2: Preparation of Pigment B (non-inventive (non-inventive)):

[0278] Azobarbituric acid (0.3 mol) prepared according to Guideline 1 was mixed with 1500 g of distilled water at 82 °C. Then 10 g of 30% strength hydrochloric acid were added dropwise to adjust the pH to 2-2.5. Thereafter 79.4 g of melamine (0.63 mol) were introduced. Then 0.3 mol of about 25% strength nickel chloride solution was added dropwise. After 3 hours at 82°C, the pH was adjusted to about 5.5 using KOH. Then dilute with about 100 g of distilled water at 90°C. 21 g of 30% strength hydrochloric acid are then added dropwise and a temperature of 90° C. is maintained for 12 hours. Thereafter the pH was adjusted to about 5 using aqueous potassium hydroxide solution. The pigment is then separated on a suction filter, washed, dried in a vacuum oven at 80° C., and ground in a standard laboratory mill for about 2 minutes. (Pigment B = adduct of nickel azobarbiturate and melamine).

Embodiment 3-5

[0279] Examples 3-5: Preparation of Pigments C, D, and E (Inventive (Inventive))

[0280] In the following inventive (inventive) Examples 3 to 5, the operation of Example 2 was repeated, but the nickel chloride solution was replaced by a mixed solution of nickel chloride and zinc chloride.

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PUM

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Abstract

The new metal azo pigments comprising the adduct of a) at least two metal azo compounds of the formula (I) or their tautomeric forms in which the substituents have the definition indicated in the description, and b) at least one compound of the formula (II) in which R6 has the definition indicated in the description, are characterized in that in the X-ray diffractogram with a lattice constant of d=10.3 (±0.2) Å the metal azo pigment has a signal S1 with an intensity I1 and in the lattice constant range from d=16.05 Å to d=11.78 Å has no signal S2 whose intensity I2 in relation to the intensity I1 of signal S1, expressed as ratio I2 / I1 of the background-corrected intensities, exceeds a value of 0.02, and are outstandingly suitable for producing pigment preparations and especially for producing colour filters.

Description

technical field [0001] The present invention relates to novel metalloazo pigments, to processes for their production, to pigment preparations containing these metalloazo pigments and to their use, in particular for the production of color filters, and also to color the filter itself. Background technique [0002] Color filters are mainly used today in liquid crystal displays and screens, color resolution instruments, and sensors. A known example is the flat panel display on a personal computer. There are a variety of technologies for producing color filters that differ not only in the applied colors but also in the generation of colored pixel patterns from the red, green and blue primary colors in addition to black. Color can be applied, for example, by coloring a base layer (e.g. gelatin), by screen printing with the aid of soluble dyes or pigments ("dye method", "dye dispersion method"), pigment pastes, pigment preparations or pigment inks , offset printing, or inkjet p...

Claims

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Application Information

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IPC IPC(8): C09B67/20C09D17/00C09D11/037D06P1/44G03F7/032
CPCC09B45/22G02F1/133514C09B67/0029C09B67/0002C09B45/18C09D11/101G03F7/0007C09D11/322C09B67/0051C09B45/14C09D11/037C09B57/00C09B62/415C09B67/0033
Inventor 汉斯-乌尔里希·伯尔斯特弗兰克·林克海因茨-约瑟夫·菲尔曼斯特凡·米凯利斯迪尔克·普菲岑罗伊特萨比娜·恩德特
Owner LANXESS DEUTDCHLAND GMBH
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