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CN-122013498-A - High-dispersity fluorescent whitening functional auxiliary agent and preparation method and application thereof

CN122013498ACN 122013498 ACN122013498 ACN 122013498ACN-122013498-A

Abstract

The invention discloses a high-dispersivity fluorescent whitening functional auxiliary agent and a preparation method and application thereof, and relates to the technical field of functional dyes. The high-dispersibility fluorescent whitening functional auxiliary agent comprises, by weight, 40-50 parts of a fluorescent whitening agent, 10-15 parts of sodium lignin sulfonate, 5-8 parts of a pH buffer agent, 3-5 parts of an anti-aging agent and 50-70 parts of deionized water. According to the invention, undecylenic acid and hexaethylene glycol monomethyl ether react to generate an ester compound, the ester compound generates an epoxy compound under the action of hydrogen peroxide and formic acid, 4 '-diaminostilbene-2, 2' -disulfonic acid and trimellitic anhydride react to generate a tetracarboxylic compound, and the epoxy compound reacts with the tetracarboxylic compound to generate the fluorescent brightening agent. The high-dispersibility fluorescent whitening functional auxiliary agent prepared by the invention has excellent dispersibility, stability and ageing resistance, and has important application significance in the field of cotton fiber textiles.

Inventors

  • ZHENG AIHUA
  • ZHENG CHEN
  • MA JIE
  • YANG CHENGFENG
  • ZHAO JIANLAN
  • ZHANG XIAOQI

Assignees

  • 江苏格罗瑞化学有限公司

Dates

Publication Date
20260512
Application Date
20260115

Claims (10)

  1. 1. The high-dispersibility fluorescent whitening functional auxiliary agent is characterized by comprising the following raw materials in parts by weight: 40-50 parts of fluorescent whitening agent, 10-15 parts of sodium lignin sulfonate, 5-8 parts of pH buffering agent, 3-5 parts of anti-aging agent and 50-70 parts of deionized water; the fluorescent whitening agent is prepared by the following method: s1, undecylenic acid reacts with hexaethylene glycol monomethyl ether to generate an ester group compound, S2, generating an epoxy compound by the ester compound under the action of hydrogen peroxide and formic acid, S3, 4 '-diaminostilbene-2, 2' -disulfonic acid reacts with trimellitic anhydride to generate a tetracarboxylic compound, And S4, reacting the epoxy compound with a tetracarboxylic compound to generate the fluorescent whitening agent.
  2. 2. The high-dispersibility fluorescent whitening functional auxiliary agent according to claim 1, wherein in the step S1, the feeding molar ratio of undecylenic acid to hexaethylene glycol monomethyl ether is 1 (1.05-1.1).
  3. 3. The high-dispersibility fluorescent whitening functional auxiliary agent according to claim 1, wherein in the step S2, the feeding mole ratio of the ester-based compound, hydrogen peroxide and formic acid is 1 (1.5-1.8): 1.2-1.5.
  4. 4. The high-dispersibility fluorescent whitening functional auxiliary agent according to claim 1, wherein in the step S3, the feeding molar ratio of the 4,4 '-diaminostilbene-2, 2' -disulfonic acid to the trimellitic anhydride is 1 (2.1-2.2).
  5. 5. The high-dispersibility fluorescent whitening functional auxiliary according to claim 1, wherein in the step S4, the feeding molar ratio of the epoxy compound to the tetracarboxylic acid compound is (4.1-4.2): 1.
  6. 6. A highly dispersible fluorescent whitening functional additive according to claim 1, characterized in that the anti-aging agent is prepared by the following method: n1 is that cyanuric chloride reacts with 2, 6-tetramethyl-4-aminopiperidine to generate monosubstituted product, N2 is that the monosubstituted product reacts with 2, 5-diaminobenzene sulfonic acid to generate a disubstituted product, And N3, the disubstituted product reacts with polyoxyethylene hexyl ether to generate the anti-aging agent.
  7. 7. The high-dispersibility fluorescent whitening functional auxiliary agent according to claim 6, wherein in the step N1, the feeding molar ratio of cyanuric chloride to 2, 6-tetramethyl-4-aminopiperidine is 1:1.05, in the step N2, the feeding molar ratio of the monosubstituted product to 2, 5-diaminobenzenesulfonic acid is 2.1:1, and in the step N3, the feeding molar ratio of the disubstituted product to polyoxyethylene hexyl ether is 1:2.2.
  8. 8. A highly dispersible fluorescent whitening functional additive according to claim 1 wherein the pH buffering agent is a mixture of citric acid and sodium citrate.
  9. 9. A method for preparing the high-dispersibility fluorescent whitening functional additive according to any one of claims 1 to 8, which is characterized by comprising the following steps: (1) Weighing 40-50 parts of fluorescent whitening agent, 10-15 parts of sodium lignin sulfonate, 5-8 parts of pH buffering agent, 3-5 parts of anti-aging agent and 50-70 parts of deionized water according to parts by weight; (2) Mixing sodium lignin sulfonate with deionized water, heating, stirring uniformly, naturally cooling to room temperature, adding fluorescent whitening agent, stirring, adding pH buffering agent and anti-aging agent, shearing at high speed, and sieving to obtain the high-dispersibility fluorescent whitening functional auxiliary agent.
  10. 10. Use of a highly disperse fluorescent whitening functional aid according to any of claims 1 to 8 in cotton fiber textiles.

Description

High-dispersity fluorescent whitening functional auxiliary agent and preparation method and application thereof Technical Field The invention relates to the technical field of functional dyes, in particular to a high-dispersity fluorescent whitening functional auxiliary agent and a preparation method and application thereof. Background Fluorescent whitening agent as one kind of optical regulator has been widely used in textile, papermaking, plastic, washing and other industries. Cotton fiber is used as one of the main raw materials of textile, and accounts for more than 40% of the raw materials of textile, and the molecular structure of cotton fiber can generate oxidation yellowing due to illumination, which greatly influences the whiteness quality of cotton textile. In addition, some fabrics are not white enough and need to be whiter and brighter. The prior solution means is to whiten cotton fiber by using fluorescent whitening auxiliary agent. However, the existing fluorescent whitening agent has the problem of insufficient light aging resistance in practical application, and influences the service life of products, and besides, the existing fluorescent whitening agent has poor dispersibility, and is easy to layer under long-time storage, so that the concentration difference of the upper and lower whitening agents is caused, the whitening effect between batches is uneven, and the quality of the products is influenced. The Chinese patent publication No. CN119913745A discloses a fluorescent whitening agent with high dispersion stability, a preparation method and an application method, wherein the fluorescent whitening agent is a dispersion liquid composed of a whitening agent filter cake, a dispersing agent, a solvent, a thickening agent, water and the like. The whitening agent is applied to the whitening processing of polyester and blended fabrics thereof, can obtain uniform whitening effect, does not form fluorescent spots or yellow spots, and can obtain high-quality whitening fabrics, but has poor ageing resistance. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a high-dispersivity fluorescent whitening functional auxiliary agent and a preparation method and application thereof. In order to achieve the above object, the present invention is realized by the following technical scheme: The high-dispersibility fluorescent whitening functional auxiliary agent comprises the following raw materials in parts by weight: 40-50 parts of fluorescent whitening agent, 10-15 parts of sodium lignin sulfonate, 5-8 parts of pH buffering agent, 3-5 parts of anti-aging agent and 50-70 parts of deionized water; the fluorescent whitening agent is prepared by the following method: s1, undecylenic acid reacts with hexaethylene glycol monomethyl ether to generate an ester group compound, and the reaction equation is shown as follows: s2, generating an epoxy compound by the ester compound under the action of hydrogen peroxide and formic acid, wherein the reaction equation is shown as follows: S3, reacting 4,4 '-diaminostilbene-2, 2' -disulfonic acid with trimellitic anhydride to generate a tetracarboxylic compound, wherein the reaction equation is shown as follows: And S4, reacting the epoxy compound with a tetracarboxylic compound to generate the fluorescent whitening agent. The reaction equation is shown below: in the step S1, the feeding molar ratio of the undecylenic acid to the hexaethylene glycol monomethyl ether is 1 (1.05-1.1). In the step S2, the feeding mole ratio of the ester group compound, the hydrogen peroxide and the formic acid is 1 (1.5-1.8) to 1.2-1.5. In the step S3, the feeding mole ratio of the 4,4 '-diaminostilbene-2, 2' -disulfonic acid to the trimellitic anhydride is 1 (2.1-2.2). In the step S4, the feeding molar ratio of the epoxy compound to the tetracarboxylic compound is (4.1-4.2): 1. The anti-aging agent is prepared by the following method: N1, cyanuric chloride reacts with 2, 6-tetramethyl-4-aminopiperidine to generate a monosubstituted product, and the reaction equation is shown as follows: N2 is a monosubstituted product and 2, 5-diaminobenzene sulfonic acid react to generate a disubstituted product, and the reaction equation is shown as follows: And N3, the disubstituted product reacts with polyoxyethylene hexyl ether to generate the anti-aging agent. The reaction equation is shown below: In the step N1, the feeding molar ratio of cyanuric chloride to 2, 6-tetramethyl-4-aminopiperidine is 1:1.05, in the step N2, the feeding molar ratio of the monosubstituted product to 2, 5-diaminobenzenesulfonic acid is 2.1:1, and in the step N3, the feeding molar ratio of the disubstituted product to polyoxyethylene hexyl ether is 1:2.2. The pH buffering agent is a mixture of citric acid and sodium citrate. The preparation method of the high-dispersivity fluorescent whitening functional auxiliary agent is characterized by comprising the following steps of: