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Amphiprotic triazine-DSD acid fluorescent whitener of tetra-sulfonic acid, synthesizing method thereof and applications

A technology of fluorescent whitening agent and tetrasulfonic acid, which is applied in the direction of adding luminescent/fluorescent substances, bleaching products, dyes of washing compositions, etc., can solve the problems of strong acid resistance, poor light fastness, easy precipitation, etc. Stable, good dye uptake, improved bonding and washing fastness

Inactive Publication Date: 2008-11-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most triazine-DSD acid fluorescent whitening agents have the disadvantages of strong acid resistance and light fastness, and are easy to precipitate under acidic conditions.

Method used

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  • Amphiprotic triazine-DSD acid fluorescent whitener of tetra-sulfonic acid, synthesizing method thereof and applications
  • Amphiprotic triazine-DSD acid fluorescent whitener of tetra-sulfonic acid, synthesizing method thereof and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In a 500ml three-neck flask (ice-water bath), add a mixture of 60g deionized water and 180g ice and 7.40g cyanuric chloride, keep the temperature at 5°C, stir vigorously to disperse evenly, add 6.93g p-aminobenzenesulfonic acid, and adjust the pH value At about 2.0, react for 2.5 hours and then rise to about 10°C; raise the temperature to 40°C in a constant temperature water bath, add 7.39g of DSD acid, adjust the pH value to 3.5, react for 2.5h; then raise the temperature to 75°C, add 4.61g of N- Methylmorpholine, adjust the pH value to 7.5, react for 2.5 hours, and dry to obtain a solid product that is a quaternary ammonium salt-type fluorescent whitening agent, with a yield of 85.8%.

Embodiment 2

[0018] In a 500ml three-necked flask (ice-water bath), add a mixture of 60g deionized water and 180g ice and 7.40g cyanuric chloride, keep the temperature at 0°C, stir vigorously to disperse evenly, add 6.93g p-aminobenzenesulfonic acid, and adjust the pH value At about 2.0, react for 2.5 hours and then rise to about 10°C; raise the temperature to 45°C in a constant temperature water bath, add 7.39g of DSD acid, adjust the pH value to 4.5, and react for 2.5h; then raise the temperature to 85°C, add 4.69gN,N - Diethylethanolamine, adjust the pH value to 8.5, react for 2.5 hours, and dry to obtain a solid product that is a quaternary ammonium salt-type fluorescent whitening agent, with a yield of 82.7%.

Embodiment 3

[0020] In a 500ml three-neck flask (ice-water bath), add a mixture of 60g deionized water and 180g ice and 7.40g cyanuric chloride, keep the temperature at 5°C, stir vigorously to disperse evenly, add 6.93g p-aminobenzenesulfonic acid, and adjust the pH value At about 2.0, react for 2.5 hours and then rise to about 10°C; raise the temperature to 43°C in a constant temperature water bath, add 7.39g of DSD acid, adjust the pH value to 4.0, and react for 2.5h; then raise the temperature to 80°C, add 6.53g of N, N-diethanol glycine, adjust the pH value to 7.8, react for 2.5 hours, and dry to obtain a solid product that is a quaternary ammonium salt-type fluorescent whitening agent, with a yield of 81.5%.

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Abstract

The invention relates to a tetrasulfonic acid series of amphoteric triazine-DSD acidic fluorescent whitening agents, as well as synthesis and an application of the same. The series of fluorescent whitening agents are mainly applied to papermaking paint printing ink and textile. The synthesis adopts the following steps that: a. cyanuric chloride reacts with aminobenzene sulfonic acid at a temperature between 0 and 5 DEG C for 2.5 h, with pH value controlled to be between 1.8 and 2.1, so as to synthesize one-step condensation product; b. the one-step condensation product reacts with 4, 4'-diaminodiphenylethylene-2, 2'-disulfonic acid at a temperature between 40 and 45 DEG C for 2.5 h, with pH value controlled to be between 3.5 and 4.5, so as to synthesize two-step condensation product; the two-step condensation product reacts with a series of tertiary amine compounds at a temperature between 78 and 85 DEG C for 2.5 h, with pH value controlled to be between 7.5 and 8.5, so as to synthesize a series of amphoteric triazine-DSD acidic fluorescent whitening agents containing quaternary ammonium salt groups. Application results show that: the fluorescent whitening agents can be used under neutral / alkaline conditions, and has higher dye uptake rate and better whitening effect under acidic conditions.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, and provides a tetrasulfonic acid series amphoteric triazine-DSD acid fluorescent whitening agent and its synthesis and application. Background technique [0002] Triazine-DSD acid fluorescent whitening agent, that is, triazine aminostilbene fluorescent whitening agent, is widely used in papermaking, textile, coating, detergent and other industries because of its high cost performance, and has become a research topic at home and abroad. And one of the most produced fluorescent whitening agents. The traditional triazine-DSD acid fluorescent whitening agent, due to the good water solubility of the anionic sulfonic acid group, has poor affinity with polyamide fiber and acetate fiber of hydrophobic fabrics, the dyeing rate is not high, and the whitening effect is average. At the same time, the traditional fluorescent whitening agent has poor acid resistance, is easy to precipitate under acidi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/70D21H21/30D06L3/12C11D3/42D06L4/614
Inventor 曹成波陶武松
Owner SHANDONG UNIV
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