Triazine radical amido diphenyl ethylene fluorescent bleaches
A technology of triazine-based aminostilbene and fluorescent whitening agent, which is applied in the direction of luminescent/fluorescent substance addition, bleaching products, organic chemistry, etc., and can solve problems such as easy decomposition and unstable storage of fluorescent whitening agent
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Embodiment 1
[0058] In the three-necked flask, add 120g of a mixture of deionized water and ice, the ratio is 1:3, take two parts of CC4.04g each, stir and disperse for 30min, then add R 1 and R 2 3.5g each of p-aminobenzenesulfonic acid, keep the temperature below 5°C, control the pH value at about 2.0, react for 110min; then raise the temperature to 40-50°C, add R 3 Ethanolamine 1.2g or R 4 Diethanolamine is 2.1g, the pH value is 5.0 at 40°C, and the reaction is 90 minutes to obtain disubstituted triazine compounds 3 and 4; at 85-90°C, triazine compound (3) and 7.4g of ANSD acid undergo a three-step condensation reaction, the pH The value is 8.0, and the reaction time is 100 minutes; in a four-necked flask equipped with a reflux condenser, 6g CC molar iron powder and 2.2g ammonium chloride are made into a reducing solution, so that the nitro group on the compound is reduced to the amino group, and the iron is removed by filtration. Then add the synthesized triazine compound 4 at 90°C t...
Embodiment 2
[0060] In a 500ml three-neck flask (ice-water bath), add a mixture of 60g deionized water and 180g ice and 7.4g cyanuric chloride, keep the temperature at 0-5°C, stir vigorously to disperse evenly, add 6.4g p-aminobenzenesulfonic acid, Adjust the pH to about 2.0, react for 2.5 hours and then raise it to about 10°C; raise it to 40-50°C in a constant temperature water bath, add 6.8g of DSD acid, adjust the pH to about 3.5-4.5, react for 1.5-2.5h; then raise the temperature to 75-85°C, add 1.93g diethanolamine and 1.12g ethanolamine, adjust the pH value to about 7.5-8.5, and react for 2-3h. After the reaction is completed, the solid product obtained by drying is the mixed compound fluorescent whitening agent.
Embodiment 3
[0062] In a 500ml three-neck flask (ice-water bath), add a mixture of 60g deionized water and 180g ice and 7.4g cyanuric chloride, keep the temperature at 0-5°C, stir vigorously to disperse evenly, add 6.4g p-aminobenzenesulfonic acid, Adjust the pH to about 2.0, react for 2.5 hours and then raise it to about 10°C; raise it to 40-50°C in a constant temperature water bath, add 6.8g of DSD acid, adjust the pH to about 3.5-4.5, react for 1.5-2.5h; then raise the temperature to 75-85°C, add 5.47g triethanolamine, adjust the pH value to about 7.5-8.5, and react for 2-3h. After the reaction is completed, the solid product obtained by drying is the quaternary ammonium salt type fluorescent whitening agent.
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