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Method for preparing liquid fluorescent brightener composition of diphenylvinyl triazine compounds

A stilbene triazine, fluorescent whitening agent technology, applied in the direction of styrene-based dyes, luminescent/fluorescent substance addition, chemical instruments and methods, etc. To solve the problem of low degree, to achieve the effect of ensuring water solubility, high whiteness and stable performance

Active Publication Date: 2012-05-30
江苏晋光化工科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The present invention mainly aims at the disadvantages of low fluorescence intensity and low whiteness of a single-component liquid fluorescent whitening agent, and provides a preparation method of a distyryl triazine liquid fluorescent whitening agent composition

Method used

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  • Method for preparing liquid fluorescent brightener composition of diphenylvinyl triazine compounds
  • Method for preparing liquid fluorescent brightener composition of diphenylvinyl triazine compounds
  • Method for preparing liquid fluorescent brightener composition of diphenylvinyl triazine compounds

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A preparation method of a stilbene triazine liquid fluorescent whitening agent composition, comprising the following steps:

[0038] 1) Add 100 grams of crushed ice to a beaker of 500 milliliters of water, adjust the pH value to 2.0 with hydrochloric acid with a mass fraction of 30%, stir and cool down to 0±2°C, add 20.0 grams of cyanuric chloride, start stirring, and beat for 1 hour, slowly add 4,4'-diaminostilbene-2,2'-disulfonic acid sodium aqueous solution prepared with 19 grams of 4,4'-diaminostilbene-2,2'-disulfonic acid After adding for 20 minutes, adjust the pH value of the system to 4 with a mass fraction of 10% sodium hydroxide solution, and maintain this pH value for 1.5 hours, then adjust the pH value to 6, maintain this pH value, and react until it is detected by an amino reagent In the system, the amino group disappears, the reaction is stopped, and compound I is obtained, namely 4,4'-bis(4,6-dichlorotriazine-2-amino)stilbene-2,2'-sodium disulfonate, its s...

Embodiment 2

[0049] A preparation method of a stilbene triazine liquid fluorescent whitening agent composition, comprising the following steps:

[0050] 1) Add 100 grams of crushed ice to a beaker of 500 milliliters of water, adjust the pH value to 2.0 with hydrochloric acid with a mass fraction of 30%, stir and cool down to 0±2°C, add 20.0 grams of cyanuric chloride, start stirring, and beat for 1 Hours, slowly add 4,4'-diaminostilbene-2,2'-disulfonic acid sodium aqueous solution prepared with 19.6 g of 4,4'-diaminostilbene-2,2'-disulfonic acid After adding for 20 minutes, use 20% sodium carbonate solution to adjust the pH value of the system to 5, and keep the pH value for 1.5 hours, then adjust the pH value to 6, keep the pH value, and react to the detection system with amino reagent The amino group disappears and the reaction is stopped to obtain compound I, i.e. 4,4'-bis(4,6-dichlorotriazine-2-amino)stilbene-2,2'-sodium disulfonate, its structural formula is as follows :

[0051] ...

Embodiment 3

[0060] A preparation method of a stilbene triazine liquid fluorescent whitening agent composition, comprising the following steps:

[0061] 1) Add 100 grams of crushed ice to a beaker of 500 milliliters of water, adjust the pH value to 2.0 with hydrochloric acid with a mass fraction of 30%, stir and cool down to 0±2°C, add 20.0 grams of cyanuric chloride, start stirring, and beat for 1 Hours, slowly add 4,4'-diaminostilbene-2,2'-disulfonic acid sodium aqueous solution prepared with 19.6 g of 4,4'-diaminostilbene-2,2'-disulfonic acid , after adding for 20 minutes, the pH value of the system was adjusted to 6 with a mass fraction of 30% sodium carbonate solution, and the pH value was maintained for 1.5 hours to react until the amino group disappeared in the system detected by an amino reagent, and the reaction was stopped to obtain compound I , that is, 4,4'-bis(4,6-dichlorotriazine-2-amino)stilbene-2,2'-sodium disulfonate, its structural formula is as follows:

[0062]

[0...

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Abstract

The present invention relates to a production process of a chemical additive special for papermaking, in particular to a method for preparing a liquid fluorescent brightener composition of diphenylvinyl triazine compounds. The invention mainly solves the problems of low fluorescence intensity and low brightness of a single-component liquid fluorescent brightener. The method adopts cyanuric chloride, 4,4'-diamino-2,2'-stilbenedisulfonic acid (DSD acid), aniline, monoethanolamine and 1-R1-2-R2-acrylamide as raw material, and employs four-step reaction. The inventive liquid fluorescent brightener composition has convenient usage, good acid resistance, and good storage stability at a room temperature, and is suitable for continuous adding and metering during automatic production.

Description

technical field [0001] The invention relates to a production process of a special chemical auxiliary agent for papermaking, in particular to a preparation method of a stilbene triazine liquid fluorescent whitening agent composition. Background technique [0002] Nowadays, fluorescent whitening agents have been well known and widely used in many fields such as papermaking, washing, printing and dyeing, plastics, coatings and rubber. After being added, they can whiten, brighten and brighten fabrics or paper. effect. Among them, papermaking is one of the most important application fields of brighteners. The continuous development of new formulations and new processes of high-whiteness optical brighteners for papermaking has become a research hotspot in recent years. [0003] Theoretically, the fluorescence of a molecule refers to the ability of the molecule itself to absorb ultraviolet light and emit blue light in the visible region. This type of molecule is called a fluoresce...

Claims

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Application Information

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IPC IPC(8): C09B23/14C09K11/06D21H21/30
Inventor 季东峰张成才王真祥
Owner 江苏晋光化工科技有限公司
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