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Industrial production and detection method of a pigment red pr-48:2 with excellent migration and heat resistance

A PR-48, detection method technology, applied in chemical instruments and methods, color/spectral property measurement, azo dyes, etc., can solve problems such as inability to distinguish product migration, failure to characterize, and inability to satisfy customers. , to achieve the effect of reducing the degree of migration effect, strong intuition, and improving dispersion

Active Publication Date: 2018-06-22
CROWN CHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a new problem arises: "Customers' requirements for migration have not ceased, and under the existing process and testing methods, color migration basically does not occur in samples and standard samples, which means that it is impossible to distinguish good or bad product migration. less than characterization”
The migration resistance of the prepared pigment is at level 4, the heat resistance is 190~200°C, and the saturation is low in the PU application system. Such performance cannot meet the needs of customers.

Method used

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  • Industrial production and detection method of a pigment red pr-48:2 with excellent migration and heat resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Add 250kg of 30% sodium nitrite aqueous solution to 175kg of 2-amino-4-chloro-5-methylbenzenesulfonate sodium and 215kg / 30% concentrated hydrochloric acid stirring solution at 5°C to 10°C for diazotization reaction, Stir for 1 hour to obtain the diazonium solution for use;

[0035]2) Add 1300kg of water, 250kg of liquid caustic soda and 140kg of 2,3 acid to the reaction kettle, stir at 40-50°C to obtain a clarified liquid, add rosin solution (30kg of rosin + 15kg / 30% of liquid caustic soda + 300kg) while stirring with 100kg of water water);

[0036] 3) Inject the diazo solution into the reaction kettle at 10°C-20°C for coupling reaction, stir for 2 hours after adding the diazo solution; after raising the temperature to 35-45°C, adjust the pH of the system to 8~8.5 and stir for 30 minutes , then add inorganic calcium compound, raise the temperature to 80~85°C and keep it warm for 30 minutes, then lower it to room temperature and filter, and dry the filter cake at 85~...

Embodiment 2

[0039] 1) Add 250kg of 30% sodium nitrite aqueous solution to 175kg of 2-amino-4-chloro-5-methylbenzenesulfonate sodium and 215kg / 30% concentrated hydrochloric acid stirring solution at 5°C to 10°C for diazotization reaction, Stir for 1 hour to obtain the diazonium solution for use;

[0040] 2) Add 1300kg of water, 250kg of liquid caustic soda and 140kg of 2,3 acid to the reaction kettle, stir at a temperature of 40-50°C to obtain a clarified liquid, add 100kg of water and add S-rosin solution (30kgS-rosin+15kg / 30% liquid Alkali + 300kg water);

[0041] 3) Inject the diazo solution into the reaction kettle at 10°C-20°C for coupling reaction, stir for 2 hours after adding the diazo solution; after raising the temperature to 35-45°C, adjust the pH of the system to 8~8.5 and stir for 30 minutes , then add inorganic calcium compound, raise the temperature to 80~85°C and keep it warm for 30 minutes, then lower it to room temperature and filter, and dry the filter cake at 85~95°C t...

Embodiment 3

[0044] 1) Add 250kg of 30% sodium nitrite aqueous solution to 175kg of 2-amino-4-chloro-5-methylbenzenesulfonate sodium and 215kg / 30% concentrated hydrochloric acid stirring solution at 5°C to 10°C for diazotization reaction, Stir for 1 hour to obtain the diazonium solution for use;

[0045] 2) Add 1300kg of water, 250kg of liquid caustic soda and 140kg of 2,3 acid to the reaction kettle, stir at a temperature of 40-50°C to obtain a clarified liquid, add 100kg of water and add S-rosin solution (30kgS-rosin+15kg / 30% liquid Alkali + 300kg water);

[0046] 3) Inject the diazo solution into the reaction kettle at 10°C-20°C for coupling reaction, stir for 2 hours after adding the diazo solution; after raising the temperature to 35-45°C, adjust the pH of the system to 8~8.5 and stir for 30 minutes , then add inorganic calcium compound, raise the temperature to 80~85°C and keep it warm for 30 minutes, then lower it to room temperature and filter, and dry the filter cake at 85~95°C t...

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Abstract

The invention discloses an industrial production and detection method of excellent migration-resistant heat-resistant pigment red PR-48: 2 and belongs to the technical field of pigment synthesis and detection. The method comprises carrying out an acidification reaction process on sodium 2-amino-4-chloro-5-methylbenzenesulfonate to obtain a suspending liquid, adding a sodium nitrite aqueous solution into the suspending liquid, carrying out diazotization to obtain a diazotized solution, carrying out coupling on the diazotized solution and 3-hydroxy-2-naphthoic acid in the presence of a dispersant to obtain a product, carrying out lake treatment on the product to obtain pigment red, drying and crushing the pigment red to obtain toner particles, mixing the toner particles, PU resin and a solvent DMF according to a certain ratio, carrying out high-rate beating homogenization, coating a release paper with the slurry through a scraper, carrying out high temperature baking, tearing the coating to obtain a coloured release paper and comparing a migration degree through a color measurement instrument. The method has mild reaction conditions, low equipment requirements and short reaction time, is convenient for operation and utilizes a common dispersant. The product paratonere has good performances and migration resistance of 5 level and resists a temperature of 210-220 DEG C.

Description

technical field [0001] The invention belongs to the technical field of fine chemical synthesis and detection, and specifically relates to a kind of sodium 2-amino-4-chloro-5-methylbenzenesulfonate as a raw material, which is dissolved in high temperature to form a salt, and then processed under acidic and low temperature conditions. Diazotization reaction, coupling and coating reaction with 2-hydroxy-3-naphthoic acid, and then adjusting the crystal form in the post-treatment reaction stage, the synthetic pigment red PR-48 with excellent migration and heat resistance performance: 2 At the same time, formulate the supporting migration detection method and migration level judgment comparison table to accurately connect with the application of downstream industrial customers. Background technique [0002] Pigment migration: Pigment is mainly through the penetration of plasticizer (DOP dioctyl phthalate) and polar solvent (eg DMF) on the application medium. The main factors affe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B29/03C09B29/15G01N21/25
CPCC09B29/0007C09B29/106G01N21/25
Inventor 杨宗泽宁正才
Owner CROWN CHEMICAL CORP
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