Novel thermosetting ultraviolet stabilizer and preparation method thereof

A UV stabilizer and thermal curing technology, applied in fiber type, textile and papermaking, fiber treatment, etc., can solve the problems affecting the uniformity of spinning solution, poor compatibility, easy to fall off, etc., to achieve adhesion and anti-corrosion Excellent shedding ability

Inactive Publication Date: 2015-12-30
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the spinning process of PBO fibers is sensitive to impurities, and the compatibility between traditional light stabilizers and PBO spinning solutions is not good. Directly adding light stabilizers to spinning solutions will greatly affect the uniformity of spinning solutions. properties, affecting the spinning process and fiber properties
However, if the light stabilizer is made into a solution and coated on the surface of the PBO fiber that has been spun, due to the lack of polar groups in the molecular structure of PBO, the interaction with the light stabilizer is weak, and the small molecules of the light stabilizer are directly coated. The adsorption effect of the cover is poor, it is easy to fall off during use, and the protective effect cannot last

Method used

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  • Novel thermosetting ultraviolet stabilizer and preparation method thereof
  • Novel thermosetting ultraviolet stabilizer and preparation method thereof
  • Novel thermosetting ultraviolet stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Weigh 2.14g of 4,4'-dihydroxybenzophenone, 1.86g of aniline, 1.21g of paraformaldehyde, and 200mL of xylene into a reaction flask equipped with a stirrer, a thermometer, and a condenser, and raise the temperature Stir mechanically at 100°C, condense and reflux for 4 hours to obtain a brown solution. The cooled brown solution was poured into a separatory funnel, washed three times with 5% sodium hydroxide solution and deionized water respectively, separated the organic layer, and rotated at 80°C for 2 hours, then put it in a vacuum oven Dry at 90°C for 6 hours to obtain 3.39 g of a yellow solid product with a yield of 75.4%. The reaction equation is as follows attached Figure 4 Shown:

[0030] The characterization results of the product by proton nuclear magnetic spectrum and differential scanning calorimetry (DSC) are shown in attached Figure 5 and attached Image 6 . attached Figure 5 It is the H NMR spectrum, where the shifts at a and b are the char...

Embodiment 2

[0034] The aniline in Example 1 was replaced by p-aminophenylacetylene, and the amount of reactants was changed to: 2.14g of 4,4’-dihydroxybenzophenone, 2.34g of p-aminophenylacetylene, and 1.21g of paraformaldehyde. Except that the amount of the reactant and the thermal curing temperature are changed accordingly, other operating steps are the same as those in Example 1.

[0035] The PBO fiber that this example obtains passes through 1100w / m 2 After 100 hours of ultraviolet light irradiation, the strength retention rate was 78%.

Embodiment 3

[0037] The aniline in Example 1 was replaced by m-aminophenylacetylene, and the amount of reactants was changed to: 2.14g of 4,4'-dihydroxybenzophenone, 2.34g of m-aminophenylacetylene, and 1.21g of paraformaldehyde. Except that the amount of the reactant and the thermal curing temperature are changed accordingly, other operating steps are the same as those in Example 1.

[0038] The PBO fiber that this example obtains passes through 1100w / m 2 After 100 hours of ultraviolet light irradiation, the strength retention rate was 76%.

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Abstract

The invention relates to a novel thermosetting ultraviolet stabilizer and a preparation method thereof. The preparation method particularly comprises the following steps: (1) mixing 4,4'-dihydroxybenzophenone, an amine compound and paraformaldehyde, adding dimethylbenzene, and enabling reaction for 4 h at 100 DEG C; then washing with a sodium hydroxide solution and deionized water, filtering, spin-flashing and drying to obtain a thermosetting ultraviolet stabilizer resin monomer; (2) before use, dissolving the resin in a solvent, uniformly coating the surface of a target material requiring protection with the solvent, and heating and curing after volatilization of the solvent to form a protective layer with an ultraviolet protection function on the surface of the target material. The novel thermosetting ultraviolet stabilizer and the preparation method thereof have the advantages that the novel ultraviolet stabilizer is thermosetting resin, the surface of the target material can be uniformly coated with the thermosetting resin, and curing can be performed to form the ultraviolet protective layer, the adhesiveness is good, and as coating is performed on the well processed and formed material surface, influence on the processing process and the intrinsic properties of the material can be avoided.

Description

technical field [0001] The invention relates to the field of anti-ultraviolet light aging of polymer materials, in particular to a heat-curable ultraviolet light stabilizer and a preparation method thereof. Background technique [0002] In the outdoor environment, due to sunlight, the appearance of polymer materials will change and the performance will deteriorate, such as photoaging such as discoloration and degradation of tensile strength, impact strength and electrical properties. The ultraviolet light with a wavelength of 290-400nm in the sunlight reaching the ground is the key to the photoaging of polymer materials, and the use of ultraviolet light stabilizers is a common method for polymer materials to prevent ultraviolet light aging. [0003] At present, there are many kinds of UV light stabilizers used for photoaging of polymer materials. The commonly used light stabilizers are basically small molecules, and most of them are added to the polymer resin by blending, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06C07D263/56D06M15/37D06M101/30
Inventor 刘小云吕永蕾郑秀特周超庄启昕李欣欣
Owner EAST CHINA UNIV OF SCI & TECH
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