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Ultraviolet-absorbing coating and preparation method thereof

A technology of ultraviolet rays and coatings, applied in the field of ultraviolet absorbing coatings and their preparation, can solve the problems of easy decomposition and volatilization after long-term use, and achieve the effect of excellent ultraviolet absorption performance, not easy to degrade, and excellent ultraviolet absorption performance

Inactive Publication Date: 2015-03-04
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems and deficiencies of organic ultraviolet absorbers in the above-mentioned prior art, such as high-temperature processing and easy decomposition, and to provide a UV-absorbing coating with simple process and excellent performance and its preparation method

Method used

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  • Ultraviolet-absorbing coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Mix 40kg of cyclohexyl methacrylate, 10kg of hydroxyethyl acrylate, 25kg of 2-[2-hydroxy-5-[2-(methacryloyloxy)ethyl]phenyl]-2H-benzene at room temperature Add triazole, 100kg of toluene and 0.4kg of azobisisobutylcyanide into the reaction kettle with a condensing reflux device, so that the temperature of the condenser is controlled below 15°C, stirring at a rotation speed of 100-300rpm, and mixing evenly; Under the protection of nitrogen, the temperature was gradually raised to 75° C., the copolymerization reaction was carried out for 4 hours, and the heating was stopped to obtain an ultraviolet absorbing coating. The ultraviolet absorbing paint is a light yellow transparent liquid with a solid content of 26.8% and a viscosity of 22 seconds (coated with 4# cup, 25°C).

Embodiment 2

[0023] Mix 55kg of cyclohexyl methacrylate, 14kg of hydroxyethyl acrylate, 30kg of 2-[2-hydroxy-5-[2-(methacryloyloxy)ethyl]phenyl]-2H-benzene at room temperature Triazole, 160 ㎏ ethyl acetate and 1.7 ㎏ initiator (benzoyl peroxide: azobisisobutylcyanide=1:3 mass ratio) join in the reactor with condensing reflux device, make the condenser The temperature is controlled below 15°C, stirred at a rotation speed of 100-300rpm, and mixed evenly; under the protection of nitrogen, the temperature is gradually raised to 77°C, and the copolymerization reaction is carried out for 6 hours, and the heating is stopped to obtain an ultraviolet absorbing coating. The ultraviolet absorbing paint is a light yellow transparent liquid with a solid content of 37.3% and a viscosity of 33 seconds (coated with 4# cup, 25°C).

Embodiment 3

[0025] Mix 60kg of cyclohexyl methacrylate, 20kg of hydroxyethyl acrylate, 20kg of 2-[2-hydroxy-5-[2-(methacryloyloxy)ethyl]phenyl]-2H-benzene at room temperature Add triazole, 190kg of solvent (ethyl acetate:toluene=2:5 mass ratio) and 2.0kg of benzoyl peroxide into the reaction kettle with condensing reflux device, so that the temperature of the condenser is controlled below 15°C , stirring at a rotation speed of 100-300rpm, and mixing evenly; under the protection of nitrogen, the temperature was gradually raised to 80°C, and the copolymerization reaction was carried out for 5 hours, and the heating was stopped to obtain an ultraviolet absorbing coating. The ultraviolet absorbing paint is a light yellow transparent liquid with a solid content of 33.2% and a viscosity of 25 seconds (coated with 4# cup, 25°C).

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Abstract

The invention discloses an ultraviolet-absorbing coating and a preparation method thereof. The ultraviolet-absorbing coating is characterized by being prepared by uniformly mixing 40-60 parts by mass of cyclohexyl methacrylate, 10-20 parts by mass of hydroxyethyl acrylate, 20-50 parts by mass of ultraviolet-absorbing monomer, 100-200 parts by mass of solvents, and 0.1-2.0 parts by mass of an initiator as raw materials at below 15 DEG C and carrying out copolymerization reaction at a temperature of 75-80 DEG C under the protection of nitrogen. By copolymerizing the monomer having an ultraviolet-absorbing function and other acrylate monomers, the coating having excellent ultraviolet-absorbing property is prepared; since the coating has excellent ultraviolet-absorbing property, the transmittance of 365nm ultraviolet light can be less than 1.5% while the transmittance of the conventional ultraviolet absorber is usually above 5%. The ultraviolet-absorbing coating is suitable for being applied in the fields having anti-aging and anti-yellowing requirements, such as solar cells, liquid crystal displays, outdoor advertising, buildings and automotives.

Description

technical field [0001] The invention belongs to acrylic paint and its preparation, and relates to an ultraviolet absorbing paint and a preparation method thereof. The ultraviolet-absorbing paint solar cell, liquid crystal display, outdoor advertisement, construction, automobile and the like which have anti-aging and anti-yellowing requirements. Background technique [0002] Most polymer materials are exposed to sunlight or other strong light sources for a long time, and often have problems such as brittleness, discoloration, and performance degradation. This is because the material absorbs the ultraviolet rays with shorter wavelengths and greater energy in sunlight or other light sources. , resulting in a series of reactions such as chemical bond breaking and oxidative degradation inside the material. Ultraviolet rays are divided into four bands according to wavelength: UV-A (320-400nm), UV-B (275-320nm), UV-C (200-275nm), and UV-D (100-200nm). Part of it will be completel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/10C09D133/14C09D5/32C08F220/18C08F220/28C08F220/36C08F220/30
CPCC08F220/18C09D5/32C09D133/10C08F220/281C08F220/36
Inventor 刘洪乐朱东海罗春明梁倩倩张世明
Owner SICHUAN DONGFANG INSULATING MATERIAL
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