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Industrialized production method of transference-resistant blue light red pigment for PU (Poly Urethane)

A production method and migration-resistant technology, applied in the direction of organic dyes, etc., can solve problems such as troubles and migration of downstream enterprises, and achieve the effect of less application difficulty, low equipment requirements, and improved color light

Active Publication Date: 2013-08-21
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 traditional pigment red production methods are used in PU leather, migration phenomenon often occurs, which brings great troubles to downstream enterprises

Method used

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  • Industrialized production method of transference-resistant blue light red pigment for PU (Poly Urethane)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Put 200Kg of 2-chloro-4-aminotoluene-5-sulfonic acid into a common reaction kettle, add 2000Kg of water, 180Kg of liquid caustic soda with a content of 30%, and heat up to 90°C to dissolve into salt for 1 hour; then quickly add 320Kg of 30% % hydrochloric acid, then slowly add 240Kg of 30% sodium nitrite solution at 0°C to carry out diazotization and stirring reaction for 1 hour, and remove excess sodium nitrite with sulfamic acid to obtain diazonium solution;

[0030] 2) Inject 200Kg of 3-hydroxy-2-naphthoic acid into the coupling reaction kettle, add 420Kg of liquid caustic soda with a content of 30%, and stir until the 3-hydroxy-2-naphthoic acid is dissolved;

[0031] 3) At 15°C, add the diazo solution to the coupling reaction kettle in step 2) within 30 minutes for coupling reaction, and stir for 2 hours after adding the diazo solution;

[0032] 4) Inject 200Kg of calcium chloride into the coupling reaction kettle, stir for 1 hour, inject 100Kg of strontium nitra...

Embodiment 2

[0035] 1) Put 200Kg of 2-chloro-4-aminotoluene-5-sulfonic acid into a common reaction kettle, add 2000Kg of water, 180Kg of liquid caustic soda with a content of 30%, and heat up to 95°C to dissolve into salt for 0.8 hours; then quickly add 320Kg of 30% % hydrochloric acid, then at -10°C, add 600Kg of 30% sodium nitrite solution for 15 minutes to carry out diazotization and stirring reaction for 1 hour, and remove excess sodium nitrite with sulfamic acid to obtain diazonium solution;

[0036] 2) Inject 300Kg of 3-hydroxy-2-naphthoic acid into the coupling reaction kettle, add 510Kg of liquid caustic soda with a content of 30%, and stir until the 3-hydroxy-2-naphthoic acid is dissolved;

[0037] 3) At 30°C, add the diazo solution into the coupling reaction kettle for coupling reaction within 50 minutes, and stir at this temperature for 4 hours after the diazo solution is added;

[0038] 4) Inject 350Kg of calcium chloride into the coupling reaction kettle, stir for 1 hour, inje...

Embodiment 3

[0040] 1) Put 200Kg of 2-chloro-4-aminotoluene-5-sulfonic acid into a common reaction kettle, add 2000Kg of water, 180Kg of liquid caustic soda with a content of 30%, and heat up to 85°C to dissolve into salt for 1.2 hours; quickly add 320Kg with a content of 30% hydrochloric acid, then at a temperature of 30°C, add 280Kg of 30% sodium nitrite solution within 10 minutes to carry out diazotization and stirring reaction for 1 hour, and remove excess sodium nitrite with sulfamic acid to obtain diazonium solution;

[0041] 2) Inject 300Kg of 3-hydroxy-2-naphthoic acid into the coupling reaction kettle, add 420Kg of liquid caustic soda with a content of 30%, and stir until the 3-hydroxy-2-naphthoic acid is dissolved;

[0042] 3) At 15°C, add the diazo solution into the coupling reaction kettle within 40 minutes for coupling reaction, and stir for 2 hours after adding the diazo solution;

[0043] 4) Inject 400Kg of calcium chloride into the coupling reaction kettle, stir for 1 hour,...

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Abstract

The invention discloses an industrialized production method of a transference-resistant blue light red pigment for PU (Poly Urethane) and belongs to the technical field of fine chemical synthesis. The industrialized production method comprises the following steps of: by taking 2-chlorine-4-amino toluene-5-sulfonic acid and 3-hydroxy-2-naphthoic acid as main raw materials, and then salifying, diazotizing, coupling and carrying out a lake reaction, and subsequently, filtering and drying at 70-120DEG C to acquire the transference-resistant blue light red pigment for the PU. By adding a mixed lake salt compound into the blue light red pigment, the lake reaction efficiency is improved, the colored light of the blue pigment red is improved, the growth of the original crystal form is facilitated and the heat resistance property is improved; a modifier is added in after-treatment, so that the transference resistance application property of the blue light pigment red in the application of the PU is improved; the reaction condition is warm; the demand in equipment is low; and the acquired product blue pigment red has the advantages of good property, transference resistance reaching level 4 and above, acid resistance reaching level 4 and above, alkali resistance reaching level 4 and above, weather fastness reaching level 5 and above, heat resistance reaching higher than 220 DEG C, so that the popularization and the application are facilitated.

Description

technical field [0001] The invention belongs to the technical field of fine chemical synthesis, and in particular relates to an industrial production method of a migration-resistant blue-light red pigment for PU with higher migration resistance than conventional blue-light red pigments. Background technique [0002] Compared with C.I. Pigment Red 48:1 and 48:4, the pigment shows blue light, and the red has a blue light red tone and can be used as the standard color of gravure printing ink, but it is more yellowish than Pigment Red 57:1. Mainly used for printing ink NC-type packaging printing ink, thickens in water-based printing ink; soft PVC coloring does not bleed, heat resistance in HDPE 230 ° C / 5min, a large number of LDPE coloring, more light fast than P.R.48:1 , can also be used for PP puree coloring. [0003] PU is the abbreviation of English poly urethane, and its chemical Chinese name is "polyurethane". PU artificial leather is the skin of polyurethane component...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/20
Inventor 杨宗泽沈先松陈奇文
Owner CROWN CHEMICAL CORP
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