Reaction type ultraviolet light absorber as well as a preparation method and application thereof

A kind of ultraviolet, reactive technology, applied in the application of ultraviolet absorber in resin synthesis, reactive ultraviolet absorber, the preparation field of ultraviolet absorber

Inactive Publication Date: 2016-02-24
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there is no report on reactive UV absorbers with cross-linking properties

Method used

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  • Reaction type ultraviolet light absorber as well as a preparation method and application thereof
  • Reaction type ultraviolet light absorber as well as a preparation method and application thereof
  • Reaction type ultraviolet light absorber as well as a preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Embodiment 1: Preparation has the resin of ultraviolet absorbing function

[0090] The implementation steps of this embodiment are as follows:

[0091] A. Friedel-Crafts alkylation reaction

[0092] In an organic solvent of 1.5 times of absolute ethanol based on the weight of the reactant, in the presence of a 2% concentrated sulfuric acid catalyst based on the weight of the reactant, 2,4-dihydroxybenzophenone and N-methylolacrylamide The reactants were subjected to Friedel-Crafts alkylation reaction at a temperature of 44°C for 4 days according to a mass ratio of 1:1.0, and then centrifuged at a speed of 800 rpm to obtain a precipitate;

[0093] B. Recrystallization

[0094] The precipitate obtained in step A is washed with distilled water to neutrality, and then the washed precipitate is recrystallized at room temperature for 0.1h in ethanol with a concentration of 42% by volume, and then centrifuged at 1000rpm at a rotating speed. The weight ratio of distilled wat...

Embodiment 2

[0099] Embodiment 2: Preparation has the resin of ultraviolet absorbing function

[0100] The implementation steps of this embodiment are as follows:

[0101] A. Friedel-Crafts alkylation reaction

[0102] In the acetone organic solvent of 1.3 times by reactant weight, in the presence of anhydrous aluminum trichloride catalyst of 8% by reactant weight, 2,4-dihydroxybenzophenone and N-methylol The acrylamide reactant was subjected to Friedel-Crafts alkylation reaction at a temperature of 28°C for 5 days according to a mass ratio of 1:0.9, and then centrifuged at a speed of 800 rpm to obtain a precipitate;

[0103] B. Recrystallization

[0104] The precipitate obtained in step A is washed with distilled water to neutrality, and then the washed precipitate is recrystallized at room temperature for 0.3h in ethanol with a concentration of 48% by volume, and then centrifuged at 1000rpm at a rotating speed. The weight ratio of distilled water to 1:4 was washed with distilled water...

Embodiment 3

[0109] Embodiment 3: Preparation has the resin of ultraviolet absorbing function

[0110] The implementation steps of this embodiment are as follows:

[0111] A. Friedel-Crafts alkylation reaction

[0112] In the isopropanol organic solvent of 1.4 times by reactant weight, in the presence of boron trifluoride catalyst of 1% by reactant weight, 2,4-dihydroxybenzophenone and N-methylol The acrylamide reactant was subjected to Friedel-Crafts alkylation reaction at a temperature of 10°C for 7 days according to a mass ratio of 1:0.8, and then centrifuged at a speed of 800 rpm to obtain a precipitate;

[0113] B. Recrystallization

[0114] The precipitate obtained in step A is washed with distilled water to neutrality, and then the washed precipitate is recrystallized at room temperature for 0.2h in ethanol with a concentration of 30% by volume, and then centrifuged at 1000rpm at a speed of rotation. The weight ratio to distilled water is 1:3, washed with distilled water for 4 ti...

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Abstract

The invention relates to a reaction type ultraviolet light absorber as well as a preparation method and application thereof. The reaction type ultraviolet light absorber comprises a compound adopts the chemical structural formula (I) shown in the description. The reaction type ultraviolet light absorber not only contains a classic ultraviolet absorber 2,4-dihydroxy benaophenonel structure, but also contains a unique double ethylenic bond structure, and is endowed with the properties of a crosslinking agent. The reaction type ultraviolet light absorber is simple and feasible in synthesis method and high in yield, can make up limitation of complicated synthesis process of the conventional reaction type ultraviolet light absorber, and can also be used as the crosslinking agent to be applied to preparation of high-molecular polymer. The provided ultraviolet light absorber with the properties of the crosslinking agent has an excellent application prospect in preparation of the high-molecular polymer.

Description

【Technical field】 [0001] The invention belongs to the technical field of ultraviolet absorbers. More specifically, the present invention relates to a reactive ultraviolet absorber, a preparation method of the ultraviolet absorber, and an application of the ultraviolet absorber in resin synthesis. 【Background technique】 [0002] It is well known that sunlight is one of the important factors leading to the aging degradation of polymers. Due to the absorption of the ozone layer, it is difficult for ultraviolet rays below 290nm to reach the ground. But in recent decades, due to environmental pollution, especially the destruction of the ozone layer by Freon, more high-energy ultraviolet rays have reached the ground. Although the ultraviolet spectrum region (290-400mn) contains less than 5% of the sunlight energy, the sunlight in this wavelength range has enough energy to destroy the chemical bonds in the organic matter, thereby greatly shortening the life of the organic matter,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C233/38C07C231/12C08K5/20
CPCC07C231/12C07C231/24C08K5/20C07C233/38
Inventor 于良民单明礼姜晓辉李学玲李昌诚倪春花李霞张志明唐群委
Owner OCEAN UNIV OF CHINA
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