Ultraviolet curing coating

A technology for curing coatings and UV light, applied in polyester coatings, polyurea/polyurethane coatings, coatings, etc., to achieve the effects of good weather resistance, low yellowing and high curing activity

Active Publication Date: 2011-02-09
中山大桥化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the coating factory’s requirement for the yellowing of the paint film is to test the change of the yellowing value immediately after the off-line, instead of testing after a period of time. Many UV-curable coating products are difficult to meet the yellowing requirements of the coating factory. shut out

Method used

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  • Ultraviolet curing coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 (Synthesis of low yellowing initiator):

[0038] Into a 5000ml four-necked flask with a condenser, thermometer, air duct, and mechanical stirrer, pass dry air into it, turn on the stirrer, add 2661.6g butyl acrylate after 10 minutes, and dissolve 0.7g pair with 20.0g butyl acetate. Methoxyphenol (MQ), 1.4g 2,6-di-tert-butyl-p-cresol (BHT), add the above solution into the reactor under stirring conditions, weigh 35.6g DBU, and add dropwise to the reactor under stirring conditions, Slowly heat up to 45°C; weigh 1000.0g of acetylacetone, use a constant-pressure dropping funnel to add dropwise within the time range of 150-180min, wash the funnel with 30gB solvent, keep it at 45-55°C for 4h, discharge, and obtain a red-yellow liquid; Place the above liquid in an environment of 0°C for 24h, take it out, and grind into a powder. The low-yellowing initiator 4,4 diacetylpimelate dibutyl ester provided by the present invention is obtained.

Embodiment 2

[0039] Example 2 (Synthesis of low yellowing initiator):

[0040] Into a 5000ml four-necked flask with a condenser, thermometer, air duct, and mechanical stirrer, pass dry air into it, turn on the stirrer, add 2592.6g butyl acrylate after 10 minutes, and dissolve 0.7g pair with 20.0g butyl acetate. Methoxyphenol (MQ), 1.4g 2,6-di-tert-butyl-p-cresol (BHT), add the above solution into the reactor under stirring conditions, weigh 30.2g DBN, and add dropwise to the reactor under stirring conditions, Slowly increase the temperature to 45°C; weigh 1100.0g ethyl acetoacetate, use a constant-pressure dropping funnel to add dropwise within a time range of 150-180min, wash the funnel with 30gB solvent, keep it at 45°C for 4h, discharge, and obtain a red-yellow liquid; Place the above liquid in an environment of 0°C for 24h, take it out, and grind into a powder. The low-yellowing initiator 4,4 diacetylpimelate diethyl ester provided by the present invention is obtained.

Embodiment 3

[0041] Example 3 (Synthesis of low yellowing initiator):

[0042] Into a 5000ml four-necked flask with condenser, thermometer, air duct, and mechanical stirrer, pass dry air into it, turn on the stirrer, add 2676.6g methyl acrylate after 10 minutes, dissolve 0.7g pair with 20.0g butyl acetate Methoxyphenol (MQ), 1.4g 2,6-di-tert-butyl-p-cresol (BHT), add the above solution into the reactor under stirring conditions, weigh 35.6g DBU, and add dropwise to the reactor under stirring conditions, Slowly heat up to 45°C; weigh 1200.0g of acetylacetone, use a constant-pressure dropping funnel to add dropwise within the time range of 150-180min, wash the funnel with 30gB solvent, keep it at 45°C for 4h, discharge, and obtain a red-yellow liquid; The liquid is placed in a 0℃ environment for 24h, taken out, and ground into powder. Obtain the low-yellowing initiator 4,4 dimethyl diacetylpimelate provided by the present invention.

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Abstract

The invention discloses an ultraviolet curing coating. The ultraviolet curing coating is characterized by comprising basic resin, a diluting agent and a light initiator, wherein the basic resin comprises urethane acrylate resin and self-initiating polyester acrylate resin; and the light initiator comprises normal light initiator and low-yellowing light initiator. The coating provided by the invention has high curing activity; a paint film has the advantages of high hardness, high wear resistance, superior chemical resistance, low yellowing, high weather resistance and the like; and the coating is suitable for various plastic materials.

Description

technical field [0001] The invention relates to a chemical coating, in particular to a UV-curable coating using a low-yellowing initiator. The UV-curable coating has high initiating activity and overcomes the odor caused by the migration of small molecules of traditional initiators. , yellowing, toxicity and other disadvantages, and obtained a paint film with good comprehensive performance. Background technique [0002] Photocuring coating technology refers to the surface treatment technology in which photoinitiators or photosensitizers generate free radicals through ultraviolet light irradiation to initiate polymerization reactions of active monomers, oligomers or resins to obtain crosslinked and dense paint films. It is an environmentally friendly technology with high solid content, which greatly reduces the environmental pollution and damage to human health caused by organic volatiles. It also has fast curing speed, good physical properties, low pollution, energy saving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D167/06
Inventor 张博
Owner 中山大桥化工集团有限公司
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