Method for preparing liquid fluorescent brightener composition of diphenylvinyl triazine compounds
一种二苯乙烯三嗪、荧光增白剂的技术,应用在苯乙烯基染料、发光/荧光物质添加、化学仪器和方法等方向,能够解决单一组分液体荧光增白剂荧光强度低、白度不高等问题,达到保证水溶性、白度高、性能稳定的效果
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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]
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