Pigment preparations based on PY 155

A technology of pigment preparation and pigment dispersant, which is applied in the direction of pigment slurry, organic dye, ink, etc., and can solve the problems of no application technical performance, agglomeration, poor crystal quality, etc.

Active Publication Date: 2007-09-19
CLARIANT FIANCE (BVI) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the products obtained (referred to hereinafter as crude pigments) generally have poor cr

Method used

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  • Pigment preparations based on PY 155
  • Pigment preparations based on PY 155
  • Pigment preparations based on PY 155

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] According to GB-A-2 239 254, crude pigments of formula (I) are prepared by coupling diazotized dimethyl 2-aminoterephthalate with bis(acetoacetamido)benzene, but without subsequent heated in dimethylformamide.

[0074] With 1350 parts of water, 6.25 parts of styrene-maleic anhydride copolymer (SMA3000HNa  Sartomer) and 6.25 parts of the pigment dispersant of formula (VII) are adjusted into slurry. The mixture was stirred for several hours. Then, 38.4 parts of sodium hydroxide and 250 parts of crude pigment were added, and the mixture was stirred until a uniform slurry was formed. Subsequently, 150 parts of o-dichlorobenzene were added and the slurry was stirred under reflux for 1 hour. Maintain the pH above 10.5 throughout the finishing process. Then, the solvent was removed from the mixture by steam distillation. It was filtered, and the filter cake was washed with deionized water to neutral pH, dried, and ground on a rotor mill.

Embodiment 2

[0076] Repeat Example 1, the difference is to use 2.5 parts of the pigment dispersant of formula (VII), do not use SMA3000HNa  (Sartomer).

Embodiment 3

[0078] Example 2 was repeated except that 12.5 parts of the pigment dispersant of formula (VII) was used.

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Abstract

The invention concerns a pigment preparation based on C.I. Pigment Yellow 155, containing 0.1% to 50% by weight, based on the weight of C.I. Pigment Yellow 155, of at least one pigment dispersant from the group of monoazo or disazo pigments substituted with at least one sulfonic acid group, characterized in that it has a chroma C greater than 53 in the CIELAB system in a solventborne alkyd melamine varnish comprising a 6.7% by weight concentration of the pigment preparation, and/or in that it has a chroma C greater than 35 in the CIELAB system in an aqueous base varnish system in a white reduction comprising a 0.2% by weight concentration of the pigment preparation in white reduction.

Description

technical field [0001] The present invention relates to a new, improved pigment preparation based on C.I. Pigment Yellow 155 (hereinafter referred to as PY 155), its preparation and its use, especially in inkjet printing. Background technique [0002] Pigment preparations are combinations of base pigments and so-called pigment dispersants, which are pigments substituted with specific reactive groups. Pigment dispersants are added to pigments to facilitate dispersion in application media, especially in paints and printing inks, and to improve the rheological and color properties of pigments. [0003] When pigments are used for coloring high-molecular-weight organic materials, high requirements are placed on the application-technical properties of the pigments, such as high color strength, easy dispersibility, high chroma and purity of shades and good light and weather fastness. It is desirable to have the most universal possible usability for coloring various high molecular ...

Claims

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Application Information

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IPC IPC(8): C09B67/10C09D17/00
CPCC09B68/4253C09D17/003C09D11/326C09B67/0085C09B67/0055C09B67/0046C09B67/008C09B67/0084
Inventor K-H·施魏卡特J-P·莱尔希L·普尔谢隆
Owner CLARIANT FIANCE (BVI) LTD
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