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Dispersing agent for fluorescent brightener, fluorescent brightener aqueous dispersion, preparation method of dispersing agent, as well as preparation method and application of fluorescent brightener aqueous dispersion

A technology of fluorescent whitening agent and water-based dispersion, applied in dyeing method, textile and papermaking, etc., can solve the problems of poor compatibility, adverse effect of whitening effect, poor whitening effect, etc., and achieve short grinding time and negative effect. Small, brightening and even effect

Active Publication Date: 2016-03-23
临清三和纺织集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the addition of any additional additives during the whitening process may have an adverse effect on the whitening effect
In addition, the patent application whose publication number is CN101072841A also discloses an aqueous dispersion of optical brightener (OBA). This aqueous dispersion does not require other additives, and its whitening effect is very good. However, it is mainly used for The whitening of other cellulose substrates does not describe whether it is suitable for the whitening of synthetic polymer materials such as polyester fibers and polyester resins. Obviously, since polyester resins and polyester fibers are mainly made of hydrophobic materials, and this The optical brightener (OBA) molecule in the invention is a very hydrophilic molecule, and its compatibility with polyester resin, polyester fiber, etc. must be very poor, so it is theoretically deduced that the aqueous dispersion prepared by this invention has a strong The whitening effect of synthetic polymer materials such as polyester resin and polyester fiber may be poor

Method used

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  • Dispersing agent for fluorescent brightener, fluorescent brightener aqueous dispersion, preparation method of dispersing agent, as well as preparation method and application of fluorescent brightener aqueous dispersion
  • Dispersing agent for fluorescent brightener, fluorescent brightener aqueous dispersion, preparation method of dispersing agent, as well as preparation method and application of fluorescent brightener aqueous dispersion
  • Dispersing agent for fluorescent brightener, fluorescent brightener aqueous dispersion, preparation method of dispersing agent, as well as preparation method and application of fluorescent brightener aqueous dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of dispersant for fluorescent whitening agent of the present embodiment, described dispersant is prepared by following method, comprises the following steps:

[0030] Dissolve 0.3 mol of acrylamide and 0.1 mol of allyl polyoxyethylene ether (n=23) monomers in 30 grams of deionized water respectively, and dissolve 0.02 mol of ammonium persulfate in 20 grams of water, and then, under stirring conditions, control The temperature is 79-81°C. Add the monomer and the ammonium persulfate initiator aqueous solution dropwise into a four-necked flask containing 100 grams, and the dropping time is controlled at 2-3 hours. After the dropping is completed, keep warm for 3-4 hours. After cooling, the dispersant for fluorescent whitening agent is obtained, and its solid content is 36.7%.

[0031] Utilize gel permeation chromatography to record that the weight-average molecular weight of described dispersant is 12500, and its molecular structural formula is as shown in formula t...

Embodiment 2

[0039] A kind of dispersant for fluorescent whitening agent of the present embodiment, described dispersant is prepared by following method, comprises the following steps:

[0040]Dissolve 0.4mol of acrylamide and 0.1mol of allyl polyoxyethylene ether (n=23) monomers in 30 grams of deionized water respectively, and dissolve 0.02mol of ammonium persulfate in 20 grams of water, and then, under stirring conditions, control The temperature is 79-81°C. Add the monomer and the ammonium persulfate initiator aqueous solution dropwise into a four-necked flask containing 100 grams, and the dropping time is controlled at 2-3 hours. After the dropping is completed, keep warm for 3-4 hours. After cooling, the dispersant for fluorescent whitening agent is obtained, and its solid content is 37.5%.

[0041] The weight-average molecular weight of the dispersant measured by gel permeation chromatography is 14800, and its molecular structure is shown in Formula II.

[0042] A kind of aqueous di...

Embodiment 3

[0048] A kind of dispersant for fluorescent whitening agent of the present embodiment, described dispersant is prepared by following method, comprises the following steps:

[0049] Dissolve 0.5 mol of acrylamide and 0.1 mol of allyl polyoxyethylene ether (n=23) monomers in 30 grams of deionized water respectively, and dissolve 0.01 mol of ammonium persulfate in 20 grams of water, and then, under stirring conditions, control The temperature is 79-81°C. Add the monomer and the ammonium persulfate initiator aqueous solution dropwise into a four-necked flask containing 100 grams, and the dropping time is controlled at 2-3 hours. After the dropping is completed, keep warm for 3-4 hours. After cooling, the dispersant for fluorescent whitening agent is obtained, and its solid content is 38.8%.

[0050] The weight-average molecular weight of the dispersant measured by gel permeation chromatography is 16800, and its molecular structure is shown in Formula II.

[0051] A kind of aqueou...

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Abstract

The invention relates to a dispersing agent for a fluorescent brightener, a fluorescent brightener aqueous dispersion, a preparation method of the dispersing agent, as well as a preparation method and application of the fluorescent brightener aqueous dispersion. The preparation method of the dispersing agent comprises the following steps: firstly, separately dissolving acrylamide and an allyl polyoxyethylene ether monomer of which the polymerization degree is 23 in a proper amount of deionized water; then, controlling the temperature to be 79-81 DEG C under the stirring condition, separately adding the allyl polyoxyethylene ether monomer aqueous solution and an ammonium persulfate initiating agent into a four-mouth flask filled with a certain amount of deionized water drop by drop within 2-3 hours, and carrying out 3-4 hours' heat preservation after the drop-by-drop adding is finished; finally, carrying out cooling to prepare the dispersing agent of which the weight-average molecular weight is 10000-20000. The invention further provides the fluorescent brightener aqueous dispersion which contains the fluorescent brightener OB-1, the prepared dispersing agent and deionized water. When the fluorescent brightener aqueous dispersion is applied to whitening of a fabric, the fabric can be whitened and brightened very uniformly, and the whitening effect is obvious.

Description

technical field [0001] The invention belongs to the technical field of textile chemistry, and in particular relates to a dispersant for fluorescent whitening agents, its aqueous dispersion and its preparation and application. Background technique [0002] Fluorescent brightener (fluorescent brightener) is a fluorescent dye, or white dye, and 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. Fluorescent whitening agent is the product with the best heat resistance among all whitening agent products. It not only has high decomposition temperature, good whiteness, and small dosage (generally 25-300mg / kg), but also has good compatibility with additives in plastics. Compatibility, mainly used for whitening polyester fiber, polyester resin, common plastics and engineering plastics. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/28D06P1/58D06P1/00D06P3/52
CPCC08F220/56D06P1/00D06P1/525D06P3/52C08F220/286
Inventor 林丽娜文舒娄看看彭雄义蔡映杰
Owner 临清三和纺织集团有限公司
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