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Liquid fluorescent whitening agent and preparation method thereof

A fluorescent whitening agent and liquid technology, applied in chemical instruments and methods, luminescent materials, organic dyes, etc., can solve the problems of complex preparation methods, pollute the environment, and insignificant whitening effect, and reduce production costs and pollution. Effect

Active Publication Date: 2013-12-11
山西晋光化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the technical problems of inconspicuous whitening effect, poor stability, environmental pollution during use, complicated preparation method and high cost existing in the existing fluorescent whitening agent and its preparation method, and to provide a liquid fluorescent whitening agent and Its preparation method, the liquid fluorescent whitening agent has obvious whitening effect, good stability, less environmental pollution, simple preparation method and low cost

Method used

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  • Liquid fluorescent whitening agent and preparation method thereof
  • Liquid fluorescent whitening agent and preparation method thereof
  • Liquid fluorescent whitening agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] The liquid fluorescent whitening agent in this embodiment is mainly composed of V: ​​4,4'-bis[(4-m-chloroanilino-4'-anilino-6,6'-bis(2-acrylic acid serine amino )-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt, VI: 4,4'-bis[(4-m-chloroanilino- 4'-anilino-6-(1-acrylserine amino)-6'-(2-acrylserine amino)-1,3,5-triazin-2-yl)amino]stilbene-2, 2'-Disulfonic acid disodium salt, VII: 4,4'-bis[(4-m-chloroanilino-4'-anilino-6-(2-acrylserine amino)-6'-(1- Acrylserine amino)-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulphonic acid disodium salt and VIII: 4,4'-bis[(4-m Chloroanilino-4'-anilino-6,6'-bis(1-acrylserine amino)-1,3,5-triazin-2-yl)amino]stilbene-2,2'-di Disodium sulfonic acid consists of four components, and the structural formula of each component is:

[0033]

[0034] Above-mentioned liquid optical brightener, its preparation method is:

[0035] 1) Weigh 30g of cyanuric chloride, 27.2g of 4,4'-diaminostilbene-2,2'-disulfonic acid, 6.8g of an...

Embodiment 2

[0047] The liquid fluorescent whitening agent in this embodiment is the same as the liquid fluorescent whitening agent in Example 1.

[0048] Above-mentioned liquid optical brightener, its preparation method is:

[0049] 1) Weigh 30g of cyanuric chloride, 33.2g of 4,4'-diaminostilbene-2,2'-disulfonic acid, 8.3g of aniline, 11.4g of m-chloroaniline, 11.7g of acrylic acid and 18g of serine;

[0050] 2) Add 30g of pure water into the reaction vessel, add 11.7g of acrylic acid and 18g of serine into the reaction vessel to dissolve in turn, and react at 90°C for 3.5h to obtain a mixture of triple-condensed intermediates I and II, whose structural formula is:

[0051]

[0052] 3) Add 180g of 30% NaOH solution into the reaction container, add 33.2g of 4,4'-diaminostilbene-2,2'-disulfonic acid (100%) into the container solution, stir evenly to obtain 4 , an aqueous solution of 4'-diaminostilbene-2,2'-sodium disulfonate;

[0053] 4) Add 600g of 0°C ice water into the reaction vess...

Embodiment 3

[0061] The liquid fluorescent whitening agent in this embodiment is the same as the liquid fluorescent whitening agent in Example 1.

[0062] Above-mentioned liquid optical brightener, its preparation method is:

[0063] 1) Weigh 30g of cyanuric chloride, 30g of 4,4'-diaminostilbene-2,2'-disulfonic acid, 7.5g of aniline, 10.3g of m-chloroaniline, 11.7g of acrylic acid and 17g of serine;

[0064] 2) Add 30g of pure water into the reaction vessel, add 11.7g of acrylic acid and 17g of serine into the reaction vessel to dissolve in turn, and react at 90°C for 3 hours to obtain a mixture of triple-condensed intermediates I and II, whose structural formula is:

[0065]

[0066] 3) Add 180g of NaOH solution with a concentration of 30% into the reaction container, add 30g of 4,4'-diaminostilbene-2,2'-disulfonic acid (100%) into the container solution, and stir evenly to obtain 4, Aqueous solution of sodium 4'-diaminostilbene-2,2'-disulfonate;

[0067] 4) Add 600g of 0°C ice water...

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Abstract

The invention relates to a liquid fluorescent whitening agent and a preparation method thereof and mainly aims at solving the technical problems that the whitening effect is not obvious and the stability is poor in an existing fluorescent whitening agent and a preparation method thereof. According to the technical scheme, the fluorescent whitening agent is mainly composed of V, VI, VII and VIII. The preparation method of the liquid fluorescent whitening agent comprises the following steps: with cyanuric chloride, 4,4'-diamino diphenylethene-2,2'-disulfonic acid, phenylamine, m-chloroaniline, acrylic acid and serine in ratio by amount of substance of 1.0:(0.45-0.55):(0.45-0.55):(0.45-0.55):1.0:(0.95-1.05) as raw materials, firstly dissolving acrylic acid and serine in water to generate a mixture of I and II, then mixing 4,4'-diamino diphenylethene-2,2'-disulfonic acid with an NaOH solution to prepare a sodium 4,4'-diamino diphenylethene-2,2'-disulfonate solution, adding the sodium 4,4'-diamino diphenylethene-2,2'-disulfonate solution, an emulsifier and cyanuric chloride into ice water, and carrying out reaction to generate a product III; adding phenylamine and m-chloroaniline into III to generate IV; and finally adding the mixture of I and II into IV to obtain a whitening agent crude product, and then carrying out suction filtration, desalination and concentration to obtain the liquid fluorescent whitening agent product.

Description

technical field [0001] The invention belongs to a fluorescent whitening agent and a preparation method thereof, in particular to a liquid fluorescent whitening agent and a preparation method thereof. Background technique [0002] Fluorescent whitening agent has the effect of brightening and brightening, and is widely used in the fields of papermaking, textiles, plastics, coatings, synthetic detergents and leather. Among them, stilbene bistriazine fluorescent whitening agents are the most widely used fluorescent whitening agents. Because of their strong affinity with fibers, they are mainly used for pulp whitening, surface sizing, coating and cotton, linen, etc. 1. Whitening of fiber fabrics, brightening of light-colored fiber fabrics. [0003] Due to the poor water solubility of disulfonic acid fluorescent whitening agents, urea, which is more cost-effective, is usually added as a co-solvent when preparing products in liquid dosage form. At present, almost all disulfonic a...

Claims

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Application Information

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IPC IPC(8): C09B67/22C09B23/14C09K11/06
Inventor 杜江锋薛红波季东峰吕立宏
Owner 山西晋光化工有限公司
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