Polymerized ultraviolet absorbent, acrylic resin, and preparation method of modified epoxy coating

An ultraviolet absorber and acrylic resin technology, applied in the field of coatings, can solve problems such as failure and poor epoxy aging resistance, and achieve the effects of good light aging resistance and simple preparation process.

Pending Publication Date: 2020-09-11
QINGDAO AIR NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Epoxy has poor aging resistance, especially resistance to ultraviolet radiation. The traditional method of adding some ult

Method used

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  • Polymerized ultraviolet absorbent, acrylic resin, and preparation method of modified epoxy coating

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Example Embodiment

[0023] In one aspect, the present invention provides a method for preparing a polymeric ultraviolet absorber, which includes the following steps:

[0024] Mix 4-hydroxybenzophenone, N-methylol acrylamide, organic solvent and anhydrous aluminum chloride and react in a constant temperature water bath, and then purify by column chromatography to obtain a polymeric ultraviolet absorber, the polymeric ultraviolet absorber It includes 3-acrylamidomethyl-4-hydroxybenzophenone, which has a carbon-carbon double bond functional group.

[0025] In some embodiments, the organic solvent is acetone and / or dichloromethane, and the temperature of the constant temperature water bath reaction is 35-40°C.

[0026] It can be understood that, in the present invention, 4-hydroxybenzophenone and N-hydroxyacrylamide are mixed, acetone or dichloromethane is used as a solvent for the reaction, aluminum trichloride is used as a catalyst, and the desired compound 3 is purified by column chromatography. -Acryla...

Example Embodiment

[0041] Example

[0042] Preparation of polymeric ultraviolet absorber:

[0043] Add 4-hydroxybenzophenone, N-methylolacrylamide and appropriate amount of dichloromethane into a three-necked flask equipped with an electric stirring device, and place them in a constant temperature water bath at 35°C for the reaction, condense and reflux, and wait for the raw materials After dissolving, slowly add 6% mass fraction of anhydrous aluminum chloride in dichloromethane solution, and purify by column chromatography to obtain a polymeric ultraviolet absorber after the reaction.

[0044] Preparation of acrylic resin based on the polymeric ultraviolet absorber:

[0045] (1) The mass ratio is (20%-50%): (15%-35%): (2%-10%): (5%-15%): (1%-5%): (1% -5%) methyl methacrylate, BA, target compound, solvent, catalyst and chain transfer agent are mixed and added to a three-necked flask equipped with an electric stirring device, the oil bath is heated to 80℃-110℃, and the reaction is stirred while condensi...

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Abstract

The invention provides a polymerization type ultraviolet absorbent. A preparation method comprises the following steps: mixing 4-hydroxybenzophenone, N-hydroxymethyl acrylamide and an organic solventand carrying out a constant-temperature water bath reaction; and performing column chromatography purification to obtain the polymerized ultraviolet absorbent. The polymerized ultraviolet absorbent comprises 3-acrylamidemethyl-4-hydroxybenzophenone with a carbon-carbon double bond functional group. The preparation process is simple, and the ultraviolet absorbent can be used for graft polymerization; in addition, the invention further provides application of the polymerization type ultraviolet absorbent to synthesis of acrylic resin through a chemical grafting method, and relates to a modifiedepoxy coating which is obtained by compounding improved high-weather-resistance acrylic resin and epoxy resin according to a certain proportion and has corrosion resistance and aging resistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method of a polymeric ultraviolet absorber, an acrylic resin and a modified epoxy coating. Background technique [0002] Traditional supporting coatings generally include: anti-corrosion primer, intermediate coating and aging-resistant topcoat. With the advancement of science and technology and the improvement of social efficiency, traditional coating operations are increasingly insufficient, and the bottom-surface integrated coating can change the traditional three-coat system into one coat, which greatly reduces the spraying time and process. Avoid the risk of matching different coatings. As the most widely used primer, epoxy coating has an irreplaceable position in terms of anti-corrosion and mechanical properties. However, the disadvantages of traditional epoxy coatings are gradually exposed to people. One of the disadvantages that needs to be solved urgently ...

Claims

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Application Information

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IPC IPC(8): C07C231/12C07C233/31C08F220/14C08F220/18C08F220/58C09D163/00C09D133/12C09D133/08C09D5/32
CPCC07C231/12C08F220/14C08F220/18C09D163/00C09D5/32C08F220/1804C07C233/31C08F220/58C08F220/56C08L33/24
Inventor 郭焱郑同同周莲洁常海燕乔洪冰李永岗
Owner QINGDAO AIR NEW MATERIALS
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