Method for synthesizing novel reactive ultraviolet absorbent and application thereof

A UV absorber, reactive technology, used in organic chemistry, textiles and papermaking, fiber processing, etc., can solve the problems of lack of affinity, not easy to fiber, easy to diffuse, etc., and achieve good thermal stability, good soaping resistance, The effect of good thermal stability

Inactive Publication Date: 2012-07-18
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most commonly used ultraviolet absorbers in China mainly include benzophenones and benzotriazoles, etc., but these ultraviolet absorbers do

Method used

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  • Method for synthesizing novel reactive ultraviolet absorbent and application thereof
  • Method for synthesizing novel reactive ultraviolet absorbent and application thereof
  • Method for synthesizing novel reactive ultraviolet absorbent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: the synthesis of UV-DTHM

[0047]Add 2.583g (0.014mol) of cyanuric chloride and 20mL of acetone into a three-necked flask, stir and swell for 10min under ice bath conditions, then dissolve 1.4995g (0.007mol) of UV-O and 0.42g (0.0105mol) of NaOH in 15mL of acetone and 50mL of distilled water, and after the two solutions were evenly mixed, slowly added to a three-necked flask, and reacted at 0°C for 5h to obtain a light yellow powder, which was followed by TLC. After the reaction, suction filtration, The filter cake was washed with distilled water and ethanol, respectively, and repeated twice to obtain a dry crude product. Separation and purification by column chromatography (eluent: ethyl acetate:petroleum ether=1:7) gave the product as light yellow powdery solid. Yield 82.5%. Through the recrystallization of dichloromethane, a UV-DTHM single crystal was obtained, and the crystal structure was determined. For the crystal structure, see image 3 , the cr...

Embodiment 2

[0053] Embodiment 2: UV-DTHM is applied to finishing cotton fabric

[0054] Dissolve 1% (owf) UV absorber in 2mL toluene, then add it to the aqueous solution containing 5% (owf) tetradecyltrimethylammonium chloride, stir evenly, and heat in a water bath to After 60°C, put the cotton fabric soaked in water in advance into the solution, the bath ratio is 1:20, and add 20g / L sodium bicarbonate at the same time, react for 30min, then raise the temperature to 85°C, add 10g / L Na 2 CO 3 , continue to react for 60 minutes, take out the fabric, wash it with water, and dry it at 100°C for 30 minutes to obtain the finished cotton fabric. Use a textile ultraviolet protection factor tester (Cary50) to measure the ultraviolet absorption effect, and the UPF value is 66.8±3. At the same time, the properties of the finished fabric were measured (see Table 4).

Embodiment 3～6

[0055] Embodiment 3~6: the washing resistance test of UV-DTHM finishing cotton fabric

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Abstract

The invention relates to a method for synthesizing 4-(4,6-dichloro-1,3,5-triazine-2-oxo)-2-hydroxyl phenyl benzophenone serving as a novel reactive ultraviolet absorbent (UV-DTHM) and application of the UV-DTHM to the uvioresistant arrangement of cotton fabrics, and belongs to the technical field of functional aids. The method comprises the following steps of: performing etherification reaction of diphenyl ketone (UV-O) and trichloro-s-triazine (CYC) which serve as raw materials under the catalysis of sodium hydroxide, wherein a ratio of UV-O to CYC to NaOH is 1:2.0:1.5; reacting in a mixed solvent of acetone and water at the temperature of 0 DEG C for 5 hours to obtain the UV-DTHM, and the yield of the UV-DTHM is 82.5 percent. The UV-DTHM has the excellent ultraviolet absorption performance, and is high in heat stability; and active groups are contained in a molecular structure and can be reacted with substances containing groups such as animo, hydroxyl and the like. The UV-DTHM is applied to the uvioresistant arrangement of white cotton fabrics to achieve an excellent uvioresistant effect (the value of an ultraviolet protective factor (UPF) reaches 67), and the UPF value is kept at 43+/-3 basically after the cotton fabrics are soaped for 30 times, so the UV-DTHM has an excellent soaping-resistant effect.

Description

technical field [0001] The invention belongs to the technical field of functional additives, and relates to a novel reactive ultraviolet absorber 4-(4,6-dichloro-1,3,5-triazine-2-oxyl)-2-hydroxyphenylbenzene The synthesis of methyl ketone (UV-DTHM), especially relates to the application of UV-DTHM in the anti-ultraviolet finishing of cotton fabrics. Background technique [0002] Since the 20th century, due to the environmental pollution caused by the development of industry, a large number of freon and other compounds remain in the atmosphere, and are decomposed into active halogens by ultraviolet rays. Afterwards, they have a chain reaction with ozone, resulting in serious damage to the atmospheric ozone layer. After the ozone layer is greatly depleted, the ability to absorb ultraviolet radiation is greatly weakened, and the ultraviolet content in the sunlight reaching the ground continues to increase. With the increase of the amount of ultraviolet light and the gradual sh...

Claims

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Application Information

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IPC IPC(8): C07D251/26D06M13/372D06M101/06
Inventor 黄丹沈云李娜娜
Owner JIANGNAN UNIV
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