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Reactive light stabilizer suitable for protein fibers and preparing method thereof

A protein fiber, light stabilizer technology, applied in fiber processing, animal fibers, textiles and papermaking, etc., can solve the problems of poor wet durability and limited application, achieve low development cost, low energy consumption, and solve the problem of wet effect on state durability and compatibility issues

Inactive Publication Date: 2015-11-11
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wet durability of these two non-reactive UV absorbers to protein fibers is poor due to the formation of ionic bonds that are susceptible to the solvation of water.
Hindered amine light stabilizer (HALS) is another kind of light stabilizer with outstanding effect. It is usually added to materials as an auxiliary agent, which is easy to migrate and extract, and has compatibility problems with materials, so its application in the textile field is limited.

Method used

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  • Reactive light stabilizer suitable for protein fibers and preparing method thereof
  • Reactive light stabilizer suitable for protein fibers and preparing method thereof
  • Reactive light stabilizer suitable for protein fibers and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of , the reaction formula is as follows:

[0036]

[0037] Follow these steps in sequence:

[0038] 1), respectively take 0.75g (0.003mol) UV-P (2-(2'-hydroxy-5'-methylphenyl) benzotriazole), 0.02g azobisisobutyronitrile (AIBN), 30mL of tetrachloromethane was added to a 250mL three-necked flask, stirred to dissolve completely, and heated to 47°C; 0.53g (0.003mol) of bromine was added to a beaker containing 20mL of tetrachloromethane, and shaken well and controlled at 4~ It was added to the above three-necked flask within 5h (the temperature of the system in the three-necked flask was kept at 47°C), and the reaction was carried out at 47°C for 17h. After the reaction, the temperature was raised, and the product was distilled under reduced pressure (at a pressure of 9.9 mmHg, the fraction at 80° C. was collected) to obtain the product monobrominated UV-P.

[0039] 2) Dissolve 0.6g (0.015mol) NaOH in 30mL deionized water, transfer it to a thre...

Embodiment 2

[0042]

[0043] Using UV-P sulfonic acid as the starting material to replace UV-P, the molar weight remains unchanged; other reaction steps are identical to those in Example 2, and the target product II is obtained.

[0044] Remarks: Step 1) under reduced pressure distillation to a pressure of 9.9 mmHg, after evaporating the solvent to dryness, the remaining substance is the monobrominated product.

[0045] In step 2), atmospheric distillation is used to remove the solvent, and the remaining substance is the intermediate nitro light stabilizer II.

[0046] See reference for the preparation method of UV-P sulfonic acid: PhotoprotectionofWoolwithSulfonated2-(2'-Hydroxyaryl)-2H-benzotriazoles.PolymerDegradationandStability14(1986)263-284.

Embodiment 3

[0048]

[0049]

[0050] Follow these steps in sequence:

[0051] 1), add 17.4mL (0.24mol) of thionyl chloride to the 100mL three-necked flask, under stirring conditions, add 10.3g (0.06mol) of 1,2,2,6,6-pentamethylpiperidol Slowly added into the above three-necked flask in batches, heated to 70°C, and continued to stir for 2h. After the reaction is over, transfer the reaction solution to a 250 mL beaker, add 100 mL of absolute ethanol to the beaker, stir well, slowly add triethylamine dropwise to it in an ice bath, adjust the pH of the solution to neutrality, Add 100 mL of dry ether to the beaker, a white precipitate appears in the solution, filter and wash the filter cake twice with ether (the amount of ether for each time is 50 ml), take the filtrate and carry out atmospheric distillation (collect the fraction at 90 ° C) to obtain chlorine The intermediate product HC-1.

[0052] 2) Dissolve 0.6g (0.015mol) NaOH in 30mL deionized water, transfer it to a three-necked ...

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Abstract

The invention discloses a reactive light stabilizer suitable for protein fibers. The structural formula of the reactive light stabilizer is any one of the following structural formulas (please see the specification for the structural formulas). The invention further provides a preparing method of the reactive light stabilizer. The preparing method includes the steps that halogen is introduced into light stabilizing sections of the light stabilizer through a chemical reaction, obtained compounds and p-nitrophenol generate a substitution reaction in alkali liquor with the equivalent amount, and therefore nitro-group-containing ether compounds are generated; primary arylamine compounds, with ether bonds as bridge groups, connected with the light stabilizing sections are generated through the ether compounds with a thiourea dioxide reduction method, wherein amino groups of the primary arylamine compounds are located at the para-position of ether groups. The light stabilizer and the protein fibers can be firmly combined through aldehydes materials under the mild reaction condition by means of a Mannich reaction.

Description

technical field [0001] The present invention relates to a reactive light stabilizer suitable for protein fibers and a preparation method thereof. Background technique [0002] Protein fibers mainly include natural and regenerated fibers. Natural protein fibers are mainly derived from animal hair and silk, of which the largest amount of animal hair is wool. Wool fiber is soft and elastic. It is one of the earliest natural fibers used by human beings in textiles. Its products feel plump, keep warm, and are comfortable to wear. The excellent clothing performance makes wool the main raw material for high-end and high-end textile fabrics. Silk, known as "natural silk", is a continuous long fiber formed by the solidification of silk fluid secreted by mature silkworms when they form cocoons. Silk has a beautiful and light appearance, soft and smooth texture, and good moisture absorption and breathability. Wool and silk play an important role in high-end textile fabrics. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/372C07D249/20C07D211/46D06M101/10
Inventor 崔志华丁超陈维国
Owner ZHEJIANG SCI-TECH UNIV
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