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Strong green light yellow disazo organic pigment

A technology of organic pigments and disazo, applied in the field of organic pigments, can solve the problems of red color and high price of pigments, achieve high tinting strength, moderate price, and reduce usage

Active Publication Date: 2014-06-25
中国中化股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Pigment varieties having a similar structure to the present invention are C.I. Pigment Yellow 93 and Pigment Yellow 95. The disadvantages are that the pigment shade is redder and the price is high

Method used

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  • Strong green light yellow disazo organic pigment
  • Strong green light yellow disazo organic pigment
  • Strong green light yellow disazo organic pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The synthesis of embodiment 1 pigment I

[0037]Disperse 24.2 parts of red base KD in 100 ml of water and 34.5 parts of 32% hydrochloric acid at room temperature. Dissolve 6.96 parts of sodium nitrite in 30 ml of water. To 100 ml of water at 15°C, add the red base KD suspension and sodium nitrite aqueous solution at the same time to obtain a transparent light yellow diazonium salt solution. Add water to dilute to 300 parts, keep a slight excess of sodium nitrite, and wait for coupling.

[0038] Dissolve 16.1 parts of 2-chloro-1.4-bisacetoacetamido-p-phenylenediamine in 250 parts of water containing 4.2 parts of sodium hydroxide, filter, collect the mother liquor, and add water to adjust to 300 parts.

[0039] Add 14 parts of sodium acetate and 0.2 parts of emulsifier EL-40 to 200 parts of water, add the diazo component and the coupling component to the buffer system at the same time at 15 ° C, add it in about 2 hours, stir for 30 minutes, and heat up To 50°C, keep wa...

Embodiment 2

[0042] Using sodium phosphate and sodium dihydrogen phosphate instead of sodium acetate as a buffer, the operation steps of Example 1 were repeated to obtain 39.5 grams of pigment samples.

Embodiment 3

[0043] The synthesis of embodiment 3 pigment III

[0044] Diazo component and preparation are the same as in Example 1.

[0045] Dissolve 17.2 parts of 2-chloro-5-methyl-1.4-bisacetoacetamido-p-phenylenediamine in 250 parts of hot water containing 4.4 parts of sodium hydroxide, filter, collect the mother liquor, and add water to adjust to 300 parts.

[0046] Add 12 parts of sodium bicarbonate to 200 parts of water to prepare a buffer system, add the diazo component and the coupling component to the buffer system at the same time at 15 ° C, add it in about 2 hours, stir for 30 minutes, and detect the weight with H acid Nitrogen salts are all gone. Heat up to 95°C, keep warm for 2 hours, filter, and wash with water. Take the filter cake and add about 600 parts of DMF, stir and raise the temperature to reflux for 3 hours. Cool down to 30°C, filter, recover the DMF mother liquor, wash with water, and dry. Get about 41.3 grams of pigment dry product.

[0047] Compared with the...

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PUM

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Abstract

The invention discloses a strong green light yellow disazo organic pigment, which has the following structural general formula, wherein, R1 and R2 can be the same or different, and are independently selected from hydrogen, chlorine or methyl. The strong green light yellow disazo organic pigment has characteristics of good light resistance, heat resistance, solvent resistance, and acid-alkali resistance, and is suitable for coloring of plastics and inks, especially for plastic coloring.

Description

technical field [0001] The invention belongs to the field of organic pigments, in particular to a strong green light yellow disazo organic pigment. Background technique [0002] Strong green light yellow is not easy to compound due to the particularity of its color, so it is indispensable in colorants. At present, the strong green light yellow organic pigments are mainly pigment yellow 81, pigment yellow 128, pigment yellow 138, pigment yellow 175 and other varieties. Among them, Pigment Yellow 81 is widely used because of its good fastness, high tinting strength and good economy. However, since the diazo component of the pigment is tetrachlorobenzidine, it will degrade in plastics processed above 200°C and produce 3.3-dichlorobenzidine, which may cause cancer. Therefore, it has been listed as a banned pigment and strictly prohibited in some fields use. Pigment Yellow 138, which belongs to quinophthalone pigments, has good performance, but the price is relatively high, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B33/153C08L23/06C08K5/30
Inventor 王永华杨林涛黄海
Owner 中国中化股份有限公司
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