Waterborne ultraviolet-heat dual curing coating composite and preparation method thereof

A dual-curing, ultraviolet light technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of inapplicability of rapid dual-curing requirements, poor heat resistance, etc., and achieve long pot life, good flexibility, and high hardness. Effect

Inactive Publication Date: 2009-04-29
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such a high temperature is not suitable for systems ...

Method used

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  • Waterborne ultraviolet-heat dual curing coating composite and preparation method thereof
  • Waterborne ultraviolet-heat dual curing coating composite and preparation method thereof
  • Waterborne ultraviolet-heat dual curing coating composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1: Add 15.2g of cationic water-based polyurethane acrylate and 20.3g of cationic water-based polyurethane polyol into a 1000ml beaker, stir at 600 rpm for 2 hours, then add 0.87g of photoinitiator Darocur1173 and leveling agent BYK333 0.12g, 0.17g dispersant BYK163, 0.15g defoamer BYK055, 0.05g phosphate adhesion promoter, continue stirring at 600 rpm for 0.5 hours. Finally add 23.5g water-based curing agent (R 8 = Desmodur N3390, m=7), stirred at 800 rpm for 2 minutes, and discharged to obtain a milky white water-based UV-heat dual-curing coating. Among them, R 1 = hydroxyethyl acrylate, R 2 = tolyl, R 3 = polycarbonate diol (molecular weight is 2000), R 4 = methyl, R 5 = Glacial acetic acid, R 7 = ethylene glycol. Spray the prepared paint on the pre-polished, degreased, and derusted tinplate, light-cure it under a 3kw UV lamp for 10 seconds, and then heat-cure it at 60°C for 1 minute. The test results of paint film properties are shown in Table 1.

Embodiment 2

[0046] Example 2: Add 18.1g of anionic water-based polyurethane acrylate and 24.2g of anionic water-based polyurethane polyol into a 1000ml beaker, stir at 600 rpm for 2 hours, then add 1.5g of photoinitiator Darocur184, leveling agent BYK366 0.2g, 0.13g dispersant BYK163, 0.10g defoamer BYK088, 0.07g phosphate adhesion promoter, stirred at 700 rpm for 1.5 hours, and finally added 30.0g water-based curing agent (R 8 = Desmodur N3390, m=2), stirred at 800 rpm for 3 minutes, and discharged to obtain a milky white water-based UV-heat dual-curing coating. Among them, R 1 = hydroxyethyl acrylate, R 2 = tolyl, R 3 = polypropylene glycol (molecular weight is 2000), R 6 = triethylamine, R 7 = ethylene glycol. Spray the prepared paint on the pre-polished, degreased, and derusted tinplate, light-cure it under a 3kw ultraviolet lamp for 30s, and then heat-cure it at 40°C for 3 minutes. The test results of paint film properties are shown in Table 1.

Embodiment 3

[0047] Embodiment 3: 35.0g non-ionic water-based polyurethane acrylate and 41.6g non-ionic water-based polyurethane polyols were added to a 2000ml beaker, stirred at a speed of 800 rpm for 3 hours, then, 0.18g photoinitiator Darocur1173 was added, flow Leveling agent BFKA3883 is 0.22g, 0.15g dispersant BYKP105, 0.12g phosphate adhesion promoter, 800 rev / min speed of stirring for 2 hours, finally add 43.2g water-based curing agent (R 8 = Desmodur R, m=1), stirring at a speed of 900 rpm for 1 minute, and discharging to obtain a milky white water-based UV-heat dual-curing coating. Among them, R 1 = pentaerythritol triacrylate, R 2 = hexamethylene, n = 50, R 7 = Butanediol. Spray the prepared paint on the pre-polished, degreased, and derusted tinplate, light-cure it under a 3kw UV lamp for 20s, and then heat-cure it at 50°C for 3 minutes. The test results of paint film properties are shown in Table 1.

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Abstract

The invention provides a water-dilutable ultraviolet-thermal double curing coating composition and a preparation method thereof. The components of the double curing coating composition in percentage by weight are: 3.5 to 60 percent of water-dilutable urethane acrylate oligomer, 17 to 47 percent of water-dilutable polyurethane polylol, 20 to 49 percent of water-dilutable curing agent, 0.4 to 9 percent of light trigger and 0.4 to 1.6 percent of auxiliary agent. The preparation method for the double curing coating is simple and does not require complex equipment; and the working life of the coating is long and reaches as long as 9 hours; the coating obtained can be used for preparing a coating by the functional methods of spray coating, brush coating and roller coating; ultraviolet curing can be completed within a short period of time between 10 and 30 seconds, and thermal curing can be completed within a period of time between 1 and 3 minutes at a temperature of between 40 and 60 DEG C; a paint film obtained after double curing has good leveling property, flexibility, shock resistance and adhesion and high hardness; and the coating does not contain an organic solvent and a reactive diluent, and is an environment-friendly coating.

Description

technical field [0001] The invention relates to a water-based ultraviolet-heat dual-curing coating composition and a preparation method thereof. Background technique [0002] UV-curable coatings have the advantages of high efficiency, energy saving, high production efficiency, coating wear resistance, high hardness, strong adhesion, excellent corrosion resistance and low production cost, and have achieved high-speed growth and wide application in the field of modern coatings. . It is precisely because of the above-mentioned advantages that UV curing technology has shown strong vitality in production applications. US Patent No. 4,352,723 reports that the photocuring process does not completely cure small areas of shadows and that it is difficult to use fillers, which have become key obstacles restricting the application of this technology to various industries. In addition, although photocurable coatings can be cured quickly, the curing is limited by the penetration depth o...

Claims

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Application Information

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IPC IPC(8): C09D4/02C09D175/04
Inventor 张红明孙杨李季王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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