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Industrial production method for migration-resistant bright red pigment 150 used for PU

A production method and migration-resistant technology, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve problems such as troubles, migration, and poor heat resistance of downstream enterprises, and ensure the beating effect and short reaction time. , The effect of high heat resistance

Active Publication Date: 2014-11-05
CROWN CHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the products obtained by the traditional azo lake pigment red production method are used in PU tanning, there will be serious migration phenomenon and poor heat resistance, which will bring great troubles to downstream enterprises

Method used

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  • Industrial production method for migration-resistant bright red pigment 150 used for PU
  • Industrial production method for migration-resistant bright red pigment 150 used for PU

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Put 200Kg of 3-amino-4-methoxybenzanilide into a common reaction kettle, add 2000Kg of water, stir rapidly for 30 minutes, quickly add 250Kg of hydrochloric acid with a content of 30% for acid precipitation and salt formation, and obtain a dispersion. Then add 140Kg of 30% sodium nitrite solution within 5 minutes at 0°C to carry out diazotization and stirring reaction for 1 hour. 240kg of industrial sodium acetate and 4kg of MOA-4 are directly added to the diazo solution and stirred for 10 minutes, that is, the diazo solution After the preparation is completed, put it into the coupling reaction kettle, add 2000kg of water to the coupling reaction kettle to adjust the reaction liquid volume, and wait for the coupling reaction;

[0033] 2) Add 1600kg of water and 160kg of 30% liquid caustic soda to an ordinary reactor, start stirring, heat up to 80°C with steam, add 160kg of 2-hydroxy-3-naphthylcarboxamide until stirred and dissolved; then quickly add ice and cool down ...

Embodiment 2

[0036] 1) Put 200Kg of 3-amino-4-methoxybenzanilide into a common reaction kettle, add 2000Kg of water, stir rapidly for 30 minutes, quickly add 250Kg of hydrochloric acid with a content of 30% for acid precipitation and salt formation, and obtain a dispersion. Then add 140Kg of 30% sodium nitrite solution within 5min at 0°C to carry out diazotization and stirring reaction for 1 hour, 240kg of industrial sodium acetate and 4kg of OS-15 are directly added to the diazo solution and stirred for 10 minutes, that is, the diazo solution After the preparation is completed, put it into the coupling reaction kettle, add 2000kg of water to the coupling reaction kettle to adjust the reaction liquid volume, and wait for the coupling reaction;

[0037] 2) Add 1600kg of water and 160kg of 30% liquid caustic soda to an ordinary reactor, start stirring, heat up to 80°C with steam, add 160kg of 2-hydroxy-3-naphthylcarboxamide until stirred and dissolved; then quickly add ice and cool down to ro...

Embodiment 3

[0040]1) Put 200Kg of 3-amino-4-methoxybenzanilide into an ordinary reaction kettle, add 2000Kg of water, stir rapidly for 30 minutes, quickly add 320Kg of hydrochloric acid with a content of 30% for acid precipitation and salt formation, and obtain a dispersion. Then add 140Kg of 30% sodium nitrite solution within 5 minutes at 0°C for diazotization and stirring reaction for 1 hour. Industrial sodium acetate 240kg and MOA-4 6kg are directly added to the diazo solution and stirred for 10 minutes, that is, the diazo solution After the preparation is completed, put it into the coupling reaction kettle, add 2000kg of water in the coupling reaction kettle to adjust the amount of reaction liquid, and wait for the coupling reaction

[0041] 2) Add 1600kg of water and 160kg of 30% liquid caustic soda to an ordinary reactor, start stirring, and heat up to 82°C with steam, then add 8kg of 3-hydroxy-2-naphthoic acid and 152kg of 2-hydroxy-3-naphthoamide until stirring and dissolving ; Th...

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Abstract

The invention provides an industrial production method for a migration-resistant bright red pigment 150 used for PU, which belongs to the technical field of synthesis of pigments. The method comprises the following steps: subjecting 3-amino-4-methoxybenzoyl aniline, water and hydrochloric acid to an acidification salt forming reaction so as to obtain a dispersion liquid; allowing an aqueous sodium nitrite solution to undergo diazotization in the dispersion liquid so as to obtain a diazotized solution; subjecting the diazotized solution, 2-hydroxy-3-naphthamide and 3-hydroxy-2-naphthoic acid to a coupling reaction; and carrying out a heating crystal transformation reaction so as to obtain the migration-resistant bright red pigment 150 used for PU. According to the invention, reaction conditions are mild, requirements on equipment are low, reaction time is short, and a modifier is common and has small application difficulty; used raw materials do not contain halogen, meeting demands for limited product halogen content on the market and according with the new advocated theme of environmental protection; the obtained pigment has brilliant colored light, heat resistance of the pigment reaches 230 DEG C, and migration resistance of the pigment is grade 5.

Description

technical field [0001] The invention belongs to the technical field of pigment synthesis, and in particular relates to an industrial production method of a migration-resistant bright red pigment 150 for PU with high migration resistance and bright color. Background technique [0002] Compared with C.I. Pigment Red 48:2 and 48:3, the pigment exhibits blue light, which is equivalent to that of Pigment Red 57:1. Its advantages are good migration resistance, good solvent resistance, good PP heat resistance of 230°C, and bright color. Mainly used for fabric printing and dyeing, plastic, thermoplastic rubber; soft PVC coloring does not bleed, more lightfast than P.R.57:1, good solvent resistance in the direction of solvent ink, and good gloss. [0003] PU is the abbreviation of English poly urethane, and its chemical Chinese name is "polyurethane". PU artificial leather is the skin of polyurethane components. Now it is widely used in the decoration of luggage, clothing, shoes, ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B29/20C09B67/20
Inventor 杨宗泽宁正才
Owner CROWN CHEMICAL CORP
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