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Use of a pigment composition comprising mixed crystals based on CI pigment yellow 74

A technology of pigment composition and mixed crystals, which can be applied in applications, organic dyes, household appliances, etc., and can solve problems such as adverse effects on applicability, use of undescribed pigment mixtures, nozzle clogging, etc.

Active Publication Date: 2007-03-07
CLARIANT PROD DEUT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] None of the patent documents mentioned above describe the use of pigment mixtures in inkjet printing methods
In addition, in some cases, the additives described in the preparation process, such as rosin resins or their derivatives, have an adverse effect on the suitability of the pigments treated with them in inkjet printing, which is attributed to the fact that they may cause nozzle clogging

Method used

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  • Use of a pigment composition comprising mixed crystals based on CI pigment yellow 74
  • Use of a pigment composition comprising mixed crystals based on CI pigment yellow 74
  • Use of a pigment composition comprising mixed crystals based on CI pigment yellow 74

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 90 total mole % C.I. Pigment Yellow 74 and 10 total mole % C.I. Pigment Yellow 65

[0044] a) Diazo

[0045] 121.1 parts of 5-nitro-2-aminoanisole and 13.5 parts of 3-nitro-4-aminoanisole were slurried in 336 parts of water and 188 parts of 31% strength hydrochloric acid. The suspension is cooled to 0° C. with 672 parts of an ice / water mixture and diazotized by adding 107.8 parts of a 40% strength sodium nitrite solution. by adding 1.92 parts  The diazonium solution was clarified by Decalite and then filtered.

[0046] b) Coupler

[0047] 165.8 parts of o-anisidine acetoacetate were dissolved in 2152 parts of water and 94.1 parts of 33% sodium hydroxide solution. Cooling to 10° C. was carried out with the addition of ice, the coupler was precipitated with 80 parts of 80% strength acetic acid, and the product was adjusted to a pH of 9.8 using 33% strength sodium hydroxide solution.

[0048] c) Coupling

[0049] The diazo solution was added to the coupler within on...

Embodiment 2

[0084] 93 total mole % C.I. Pigment Yellow 74 and 7 total mole % C.I. Pigment Yellow 65

[0085]The synthesis was carried out analogously to Example 1, except that 125.1 parts of 5-nitro-2-aminoanisole and 9.4 parts of 3-nitro-4-aminoanisole were used. A mixture of mixed crystals is obtained.

Embodiment 3

[0087] 95 total mole % C.I. Pigment Yellow 74 and 5 total mole % C.I. Pigment Yellow 65

[0088] The synthesis was carried out analogously to Example 1, except that 127.8 parts of 5-nitro-2-aminoanisole and 6.7 parts of 3-nitro-4-aminoanisole were used. A mixture of mixed crystals is obtained.

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PUM

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Abstract

The present invention relates to the use as a colorant of a pigment composition comprising 86.0 to 99.9 total mole % of C.I. Pigment Yellow 74 molecules and 14.0 to 0.1 total mole % of at least one Monoazo pigments of general formula (1), wherein R1 is Cl, OCH3, CH3 or NO2.

Description

technical field [0001] The present invention relates to new uses of specific monoazo pigment compositions based on C.I. Pigment Yellow 74, in particular for inkjet printing and color filters. Background technique [0002] The inkjet printing method is a non-contact printing method in which small droplets of recording fluid are directed from one or more nozzles onto the substrate to be printed. In order to obtain prints of excellent quality, the recording fluids and the colorants contained therein must meet high requirements, especially also with regard to the desired color tone and reliability during printing operations. In addition to dye-based inks, pigmented inks have recently also been increasingly used in inkjet printing. In order to prevent clogging of the nozzles on the one hand and to achieve high transparency and desired shades on the other hand, the subdivision state of the pigments present in inks is an essential prerequisite for their use in inkjet printing. Th...

Claims

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Application Information

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IPC IPC(8): C09B67/22C09D11/00C09D11/10
CPCC09D11/34C09D11/32C09D11/101C09D11/322C09D11/328C09B29/33C09B67/006B41M5/00
Inventor K-H·施魏卡特D·布鲁姆F·W·格林M·U·施密特J·盖森贝尔格
Owner CLARIANT PROD DEUT GMBH
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