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CXT liquid fluorescent whitening agent and preparation method thereof

A fluorescent whitening agent and liquid technology, applied in textiles and papermaking, etc., can solve the problems of poor water solubility and large demand of fluorescent whitening agent CXT, and achieve the effect of supporting automatic continuous use and wide stability

Active Publication Date: 2021-10-01
ZHEJIANG HONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the poor water solubility of the fluorescent whitening agent CXT, its liquid products are rarely seen on the market, but high-grade paper has a large demand for liquids

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put the raw materials of Example 1 shown in Table 1 into the four-necked flask, 120 g of fluorescent whitening agent CXT acid analysis filter cake, 25 g of ethylene glycol, and 25 g of triethanolamine, heat up to 60-80 ° C, and stir until the raw materials are completely dissolved; Under the conditions, the temperature is raised to evaporate 50g of water, and then filtered to obtain a low-temperature stable CXT liquid fluorescent whitening agent.

[0025] The E value of this product is 174, which has good fluidity and stability, and it does not precipitate or solidify when refrigerated at -5°C for 6 months.

Embodiment 2

[0027] Put the raw materials of Example 2 shown in Table 1 into the four-necked flask, 120 g of fluorescent whitening agent CXT acid precipitation filter cake, 25 g of 1,2-propylene glycol, 30 g of monoethanolamine, heat up to 60-80 ° C, and stir until the raw materials are completely dissolved; Elevate the temperature under vacuum conditions to distill 30g of water and filter to obtain a low-temperature stable CXT liquid fluorescent whitening agent.

[0028] The E value of this product is 152, which has good fluidity and stability, and it does not precipitate or solidify after being refrigerated at -5°C for 6 months.

Embodiment 3

[0030] Put the raw materials of Example 3 shown in Table 1 into the four-neck flask, 120g of fluorescent whitening agent CXT acid analysis filter cake, 25g of glycerin, and 30g of triethanolamine, heat up to 60-80°C, stir until the raw materials are completely dissolved, and then filter to obtain low-temperature stable CXT Liquid Optical Brightener.

[0031] The E value of this product is 128, which has good fluidity and stability, and it does not precipitate or solidify when refrigerated at -5°C for 6 months.

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PUM

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Abstract

The invention discloses a CXT liquid fluorescent whitening agent and a preparation method thereof, and belongs to the field of whitening agents. The CXT liquid fluorescent whitening agent comprises a fluorescent whitening agent acid precipitation substance, polyol amine and polyol. During preparation, the CXT fluorescent whitening agent acid precipitation substance, the polyol amine and the polyol are used as raw materials to be added into a reaction kettle, and uniform stirring is performed; the temperature is increased to 80-100 DEG C, and after the materials are dissolved, clarified and transparent, negative pressure evaporation is performed to remove 30-50% of water; and finally, the temperature is reduced to 40-45 DEG C by cooling, and filtering is performed to obtain the CXT liquid fluorescent whitening agent. The whitening agent is easily soluble in water, has relatively wide temperature stability, can be stored for a long time, supports automatic and continuous use, and is safe and environment-friendly.

Description

technical field [0001] The invention relates to the field of whitening agents, more specifically, to a CXT liquid fluorescent whitening agent and a preparation method of the CXT liquid fluorescent whitening agent. Background technique [0002] Fluorescent whitening agent is a kind of fluorescent dye, or white dye, which is also a complex organic compound. Its characteristic is that it can excite the incident light to produce fluorescence, so that the dyed substance can obtain a shimmering effect similar to fluorite, and make the substance very white to the naked eye. [0003] However, due to the poor water solubility of the fluorescent whitening agent CXT, its liquid products are rarely seen on the market, but high-grade paper has a large demand for liquid. Contents of the invention [0004] In view of the problems existing in the prior art, the first purpose of the present invention is to provide a CXT liquid fluorescent whitening agent, which is miscible with water, has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L4/60D06L4/614
CPCD06L4/60D06L4/614
Inventor 刘肖晖王国森叶根灿刘人民
Owner ZHEJIANG HONGDA CHEM
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