Plastic colorant purple B and preparation method thereof

A coloring agent and plastic technology, applied in the field of plastic coloring agent and its preparation, can solve the problems that the reaction is difficult to reach the end point, the reaction is not easy to complete, and the product purity is reduced, so as to achieve the effect of not easy to aggregate, fast and complete reaction, and high product purity

Active Publication Date: 2021-02-05
罗子木
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Violet B currently on the market is a large amount of p-toluidine, poor light resistance, solvent resistance, etc., the coloring rate is generally 70-80%, and the material tends to become very thick during the reaction process in the preparation process, and it is difficult to stir. The raw material 1,4-diaminoanthraquinone leuco is wrapped in the material, it is not easy to complete the reaction, and the reaction is difficult to reach the end; the reaction temperature is too high, the side reaction increases, and the product purity decreases

Method used

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  • Plastic colorant purple B and preparation method thereof
  • Plastic colorant purple B and preparation method thereof
  • Plastic colorant purple B and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of plastic coloring agent violet B, described violet B is made by violet B crude product and methanol; Wherein, described violet B crude product is made of 213 parts of 30% butanol, 240 parts of 1.4-dihydroxyanthraquinone, para Made from 107 parts of toluidine, 122 parts of 30% hydrochloric acid, 63 parts of boric acid and 80 parts of catalyst; the ratio of the methanol to the crude Violet B is 3:1 by weight; the methanol is 35% methanol.

[0024] A kind of preparation method of plastic colorant purple B, concrete steps are as follows:

[0025] (1) condensation

[0026] Inhale butanol, 1.4-dihydroxyanthraquinone, and p-toluidine into the condensation reaction kettle, stirring at a speed of 55r / min for 7 minutes, then put in hydrochloric acid, boric acid and catalyst, stirring at a speed of 85r / min, and stirring for 7 minutes. Adjust the internal positive pressure to 0.04MPa, heat up to 100-120°C, and keep warm for 5 hours (the heat preservation stage is divided ...

Embodiment 2

[0035] A kind of plastic coloring agent Violet B, described Violet B is made from Violet B crude product and methanol; Wherein, described Violet B crude product is made up of 250 parts of 25% butanol, 230 parts of 1,4-dihydroxyanthraquinone in parts by weight , 108 parts of p-toluidine, 125 parts of 25% hydrochloric acid, 60 parts of boric acid and 81 parts of catalyst are made; the ratio of the methanol and the crude product of purple B is 2:1 by weight; the methanol is 30% concentration Methanol.

[0036] A kind of preparation method of plastic colorant purple B, concrete steps are as follows:

[0037] (1) condensation

[0038] Inhale butanol, 1.4-dihydroxyanthraquinone, and p-toluidine into the condensation reactor, stir at 50r / min for 10min, then put in hydrochloric acid, boric acid and catalyst, stir at 80r / min, and stir for 10min. Internally adjust the micro-positive pressure to 0.06MPa, heat up to 100-120°C, and keep warm for 4 hours (the heat preservation stage is di...

Embodiment 3

[0047]A kind of plastic coloring agent violet B, described violet B is made from violet B crude product and methanol; Wherein, described violet B crude product is made up of 200 parts of 35% butanol, 250 parts of 1,4-dihydroxyanthraquinone in parts by weight , 106 parts of p-toluidine, 120 parts of 35% hydrochloric acid, 65 parts of boric acid and 79 parts of catalyst are made; the ratio of the methanol and the crude product of purple B is 4:1 by weight; the methanol is 40% concentration Methanol.

[0048] A kind of preparation method of plastic colorant purple B, concrete steps are as follows:

[0049] (1) condensation

[0050] Inhale butanol, 1.4-dihydroxyanthraquinone, and p-toluidine into the condensation reactor, stirring at a speed of 60r / min for 5min, then put in hydrochloric acid, boric acid and a catalyst, stirring at a speed of 90r / min for 5min, and the reaction kettle Internally adjust the micro positive pressure to 0.08MPa, heat up to 100-120°C, and keep warm for...

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Abstract

The invention provides a plastic colorant purple B and a preparation method thereof. The purple B is prepared from crude purple B and methanol. The crude purple B is prepared from the following components in parts by weight: 200-250 parts of 25-35% butanol, 230-250 parts of 1, 4-dihydroxy anthraquinone, 106-108 parts of p-toluidine, 120-125 parts of 25-35% hydrochloric acid, 60-65 parts of boric acid and 79-81 parts of a catalyst, wherein the ratio of the methanol to the crudepurple B in parts by weight is (2-4): 1, and the methanol is methanol with the concentration of 30-40%. According to the plastic colorant purple B and the preparation method thereof, the reaction is rapid and complete, almost no side reaction exists, the product purity is high, and the prepared purple B has the advantages of needle-like crystal form, stable hue, beautiful appearance, high coloring rate, high light resistance, high solvent resistance and the like.

Description

technical field [0001] The invention relates to a plastic colorant and a preparation method thereof, in particular to a plastic colorant violet B and a preparation method thereof. Background technique [0002] In the plastic processing technology, plastic colorants, as a raw material, can beautify, decorate, facilitate identification, improve weather resistance, improve mechanical properties, and improve optical properties. Divided into inorganic pigments, organic pigments and dyes. [0003] Pigments have excellent performance in the coloring of plastics, sols, paper products, color pastes, inks, paints, coatings, masterbatches, chemical fibers, textiles, etc. Violet B is a solvent pigment with the molecular formula C 21 h 15 NO 3 , the molecular weight is 329.35, Chinese alias: solvent violet 13; English alias: Solvent violet 13. Shape: Black-purple needle-like crystal. It is green in case of concentrated sulfuric acid, and turns purple as the acidity decreases. Solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B1/514C08K5/18
CPCC09B1/5145C08K5/18
Inventor 罗子木
Owner 罗子木
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