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Ultraviolet-thermal double curing coating composition with anti-oxygen inhibition effect and preparation thereof

A UV light, dual-curing technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of unreported combined technologies, incomplete deep curing, incomplete curing, etc. Strong focus and good flatness

Inactive Publication Date: 2009-04-22
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, UV curing also has the following two disadvantages: on the one hand, during the UV curing process, the curing is limited by the penetration depth of UV light, especially for the incomplete curing of the shadow part of the coating; the coating contains a large amount of absorption and fillers that block UV light can also lead to incomplete deep curing
[0005] Although there are many reports in the literature on the use of dual-cure technology to solve the problem of deep curing and the introduction of amine groups into oligomers to solve the oxygen resistance effect, there is no report on the combination of the two technologies.

Method used

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  • Ultraviolet-thermal double curing coating composition with anti-oxygen inhibition effect and preparation thereof
  • Ultraviolet-thermal double curing coating composition with anti-oxygen inhibition effect and preparation thereof
  • Ultraviolet-thermal double curing coating composition with anti-oxygen inhibition effect and preparation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039]Add 18.2g polyurethane acrylate oligomer, 23.5g polyurethane polyol oligomer and 15.1g ethoxylated hydroxyethyl methacrylate into a 1000ml beaker, stir at 600 rpm for 2 hours, then add 0.65 g photoinitiator Darocur1173, 0.22g leveling agent BYK333, 0.25g dispersant BYK163, 0.21g defoamer BYK055, 0.15g phosphate adhesion promoter, continue to stir at 600 rpm for 0.5 hours. Finally, 26.0 g of curing agent (Desmodo N3390) was added, stirred at 800 rpm for 2 minutes, and discharged to obtain a light yellow UV-heat dual-curing coating with an oxygen barrier effect. Among them, R 1 = hydroxyethyl acrylate, R 2 = tolyl, R 3 = polycarbonate diol (molecular weight is 2000), R 4 = methyl, R 5 = ethylene glycol. Spray the prepared paint on the pre-polished, degreased and derusted tinplate. Under the power of 3kw UV lamp, light curing is carried out for 5s, and then heat curing is carried out at 70°C for 5min. The test results of paint film properties are shown in Table 1.

Embodiment 2

[0041] Add 23.1g polyurethane acrylate oligomer, 30.2g polyurethane polyol oligomer and 28.8g isobornyl acrylate to a 1000ml beaker, stir at 600 rpm for 2 hours, then add 0.85g photoinitiator Darocur184 , leveling agent BYK366 is 0.35g, 0.23g dispersant BYK163, 0.25g defoamer BYK088, 0.18g phosphate adhesion promoter, stir at 700 rpm for 1.5 hours, and finally add 33.5g curing agent (Tax Die (N3390), 800 rev / min stirring for 3 minutes, discharge, to obtain light yellow UV-heat dual curing coating with oxygen barrier effect. Among them, R 1 = hydroxyethyl acrylate, R 2 = tolyl, R 3 = polypropylene glycol (molecular weight is 2000), R 4 = Hydrogen, R 5 = ethylene glycol. Spray the prepared paint on the pre-polished, degreased and derusted tinplate. Under the power of 3kw UV lamp, light curing is carried out for 8s, and then heat curing is carried out at 70°C for 4min. The test results of paint film properties are shown in Table 1.

Embodiment 3

[0043] Add 6.0g polyurethane acrylate oligomer, 45.6g polyurethane polyol oligomer and 80.5g tripropylene glycol diacrylate into a 2000ml beaker, stir at 800 rpm for 3 hours, then add 0.48g Photoinitiator Darocur1173, leveling agent BFKA3883 is 2.32g, 0.25g dispersant BYKP105, 0.32g phosphate adhesion promoter, the rotating speed of 800 rev / mins was stirred for 2 hours, finally added 49.2g curing agent (Desmode R ), stirring at a speed of 900 rpm for 1 minute. The material is discharged to obtain a light yellow UV-heat dual-curing coating with an oxygen barrier effect. Among them, R 1 = pentaerythritol triacrylate, R 2 = Hexamethylene, R 3 = polypropylene glycol (molecular weight is 600), R 4 = Hydrogen, R 5 = Butanediol. Spray the prepared paint on the pre-polished, degreased and derusted tinplate. Under the power of 3kw UV lamp, light curing is carried out for 7s, and then heat curing is carried out at 70°C for 3min. The test results of paint film properties are show...

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Abstract

The invention relates to an ultraviolet photo-thermal double curing paint with oxygen inhibition resistant effect and a manufacturing method thereof. The double paint comprise the following compositions in weight percentage: 3.0 to 57.0 percent of ultraviolet curing oligomer, 7.0 to 40.0 percent of thermal curing polyhydroxy oligomer, 10.0 to 41.0 percent of curing agent, 15.0 to 60.0 percent of active diluted monomer, 0.5 to 9.0 percent of light evocating agent and 0.5 to 5.2 percent of additive. The double curing paint composition is prepared without needing complicated equipment and has application period as long as 7 hours; the main chain structure of the oligomer is provided with a tertiary amine group which removes the influence of oxygen inhibition effect so as to greatly accelerate the curing speed and complete the light curing process in a short period of between 5 and 15 seconds; after the ultraviolet photo-thermal double curing, a thick paint film with thickness of between 60 and 120 mu m can be prepared; and the obtained paint film has good leveling, high hardness, good impact resistance, good toughness and strong adhesive force and is suitable for coating various substrates.

Description

technical field [0001] The invention relates to an ultraviolet-heat dual-curing coating composition with anti-oxygen barrier effect and a preparation method thereof. Background technique [0002] Due to its excellent performance and environmental protection, UV-curable coatings have achieved rapid growth and wide application in the field of modern coatings. UV-curable coatings have the advantages of no or low VOC emissions, energy saving, fast curing speed, high production efficiency, suitable for assembly line production, and low curing temperature. It is precisely because of the above-mentioned advantages that UV curing technology has shown strong vitality in production applications. However, UV curing also has the following two disadvantages: on the one hand, during the UV curing process, the curing is limited by the penetration depth of UV light, especially for the incomplete curing of the shadow part of the coating; the coating contains a large amount of absorption An...

Claims

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Application Information

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IPC IPC(8): C09D4/02C09D175/14
Inventor 张红明李季王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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