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A kind of red sunfast acid dye and preparation method thereof

An acid dye and red technology, applied in dyeing methods, organic dyes, azo dyes, etc., can solve problems such as color cast and poor light fastness, achieve no color change, improve light fastness, and improve light fastness Effect

Active Publication Date: 2020-04-07
浙江金塔克斯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the light fastness of red azoic acid dyes based on H acid and chromotropic acid structures is usually poor (such as C.I. Acid Red 33 light fastness level 2-3, C.I. Acid Red 29 light fastness level 4), and yellow Compared with pyrazolone acid dyes and anthraquinone dyes (generally, the light fastness is above grade 5), there is still a big gap, and color casts are prone to appear after long-term light when they are used in combination.

Method used

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  • A kind of red sunfast acid dye and preparation method thereof
  • A kind of red sunfast acid dye and preparation method thereof
  • A kind of red sunfast acid dye and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1, a kind of preparation method of red sunfast acid dye, carries out following steps successively:

[0036] 1), the chlorination reaction of pentamethylpiperidinol:

[0037] Add 17.4mL (0.24mol) of thionyl chloride to a 100mL three-necked flask, and dissolve 10.3g (0.06mol) of 1,2,2,6,6-pentamethylpiperidinol in batches under stirring Slowly (the purpose is to control the temperature not to exceed 60°C) into the above-mentioned three-neck flask, heat up to 80°C, and continue to stir and react for 1.5h. After the reaction is over, transfer the reaction solution to a 250mL beaker, add 100mL of absolute ethanol to the beaker, stir thoroughly, and slowly add triethylamine dropwise to it under ice bath conditions until the pH of the solution is adjusted to neutral , add 100mL ether to the beaker, a white precipitate appears in the solution, filter and wash the filter cake twice with ether (each time the amount of ether is 50ml), combine the filtrate and washing l...

Embodiment 2

[0045] Embodiment 2, a kind of red sunfast acid dye and preparation method thereof, carry out following steps successively:

[0046] 1), the chlorination reaction of pentamethylpiperidinol:

[0047]Add 17.4mL (0.24mol) of thionyl chloride to a 100mL three-necked flask, and dissolve 10.3g (0.06mol) of 1,2,2,6,6-pentamethylpiperidinol in batches under stirring Slowly (the purpose is to control the temperature not to exceed 60°C) into the above-mentioned three-neck flask, heat up to 60°C, and continue to stir and react for 2.5 hours. After the reaction is over, transfer the reaction solution to a 250mL beaker, add 100mL of absolute ethanol to the beaker, stir well, and slowly add triethylamine dropwise to it under ice bath conditions until the pH of the solution is adjusted to neutral , add 100mL diethyl ether to the beaker, a white precipitate appears in the solution, filter and wash the filter cake twice with diethyl ether (the amount of diethyl ether is 50ml each time), combi...

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Abstract

The invention discloses red sun-proof acidic dyestuff. The structural formula of the red sun-proof acidic dyestuff is as shown in specification, and X is NH or O. The invention further discloses a preparation method of the dyestuff. The dyestuff not only has excellent light resistance, but also has light stabilizing effect on dyed fibers, and has good application prospect.

Description

technical field [0001] The invention relates to a red light-resistant acid dye and a preparation method thereof. Background technique [0002] Acid dyes refer to dye molecules containing acidic groups, also known as anionic dyes, which can combine with amino groups in protein fiber (wool, silk, etc.) molecules by ionic bonds, and are suitable for acidic, weak acidic or neutral conditions. Acid dyes have the characteristics of bright color, good level dyeing, simple dyeing method, complete color spectrum and low cost. They are mainly used in dyeing and printing of silk, wool, nylon and other fibers and their blended fabrics. [0003] Azoic acid dyes have the advantages of bright color, complete chromatogram, and low production cost, and account for the largest proportion of acid dyes. However, the light fastness of red azoic acid dyes based on H acid and chromotropic acid structures is usually poor (such as C.I. Acid Red 33 light fastness level 2-3, C.I. Acid Red 29 light fa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B29/36C09B67/26D06P1/39D06P1/673D06P3/16
CPCC09B29/3621C09B67/0073D06P1/39D06P1/6735D06P3/16
Inventor 章金芳崔志华徐华君顾百铨张永高
Owner 浙江金塔克斯科技有限公司
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