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Waterborne ultraviolet-heat dual-cured coating and preparation method thereof

A technology of water-based curing agent and ultraviolet light, which is applied in the direction of coating, etc., can solve the problems of foaming when wet, poor hardness, incomplete curing, etc., and achieve the effect of not easy to foam when wet

Active Publication Date: 2012-07-11
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, there are several disadvantages of UV-curable coatings: (1) For the structural substrate of special-shaped parts, the curing is incomplete due to the presence of shadows; (2) UV-curable coatings containing a large number of fillers that absorb or block UV light cannot be completely cured. to solidify
The above reports are all polyurethane dual-cure coatings. The disadvantages of this type of coatings mainly include problems such as moisture foaming, poor hardness, and powdering of the paint film.

Method used

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  • Waterborne ultraviolet-heat dual-cured coating and preparation method thereof
  • Waterborne ultraviolet-heat dual-cured coating and preparation method thereof
  • Waterborne ultraviolet-heat dual-cured coating and preparation method thereof

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preparation example Construction

[0066] The present invention also provides a method for preparing a water-based ultraviolet-heat dual-curing coating, comprising:

[0067] adding and mixing epoxy resin, water-based curing agent and water-based epoxy acrylate oligomer to obtain a mixed solution;

[0068] Add photoinitiator, leveling agent and defoamer under stirring to obtain water-based UV-heat dual-curing coating;

[0069] Described water-based ultraviolet light-heat dual-curing coating comprises by weight parts:

[0070] 20-42 parts of epoxy resin;

[0071] 36.5-48.8 parts of water-based epoxy acrylate oligomer;

[0072] 31-63 parts of water-based curing agent;

[0073] Photoinitiator 2.9~7.5 parts;

[0074] Leveling agent 0.9~3.5 parts;

[0075] Defoamer 0.5-2.0 parts.

[0076] First prepare raw material; According to the present invention, described waterborne epoxy acrylate oligomer is preferably prepared by the inventor himself, and the preparation method is as follows:

[0077] Preparation metho...

Embodiment 1

[0086] With 20 grams of epoxy resin E44, 31 grams of water-based curing agent H206B and 36.5 grams of cationic water-based epoxy acrylate oligomer (R 1 = acrylic acid, R 2 = glacial acetic acid, m=2) join in the beaker, stir with the speed of 2000rpm 0.5 hour, under stirring, add 2.9 gram photoinitiator Darocur1173, 0.9 gram leveling agent BYK333 and 0.5 gram defoamer BYK055, continue with 2000rpm Stir at a rotating speed for 1.5 hours; obtain a water-based UV-heat dual-curing coating. 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 80°C for 2 minutes. The test results of paint film properties are shown in Table 1.

Embodiment 2

[0088] With 42 grams of epoxy resin E51, 63 grams of water-based curing agent H205B and 48.8 grams of non-ionic water-based epoxy acrylate oligomer (R 1 =acrylic acid, m=23, n=50) join in the beaker, stir with the speed of 2000rpm 1 hour, under stirring, add 7.5 grams of photoinitiator Irgacure184, 3.5 grams of leveling agent BYK366 and 2 grams of defoamer BYK088, continue Stir at 2000 rpm for 0.5 hour; obtain a water-based UV-heat dual-curing coating. Spray the prepared paint on the pre-polished, degreased, and derusted tinplate, light-cure it under a 3kw UV lamp for 30s, and then heat-cure it at 85°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 waterborne ultraviolet-heat dual-cured coating. The coating comprises the following components in part by weight: 20 to 42 parts of epoxy resin, 6.5 to 48.8 parts of waterborne epoxy acrylate oligomer, 31 to 63 parts of waterborne curing agent, 2.9 to 7.5 parts of photoinitiator, 0.9 to 3.5 parts of leveling agent and 0.5 to 2.0 parts of defoaming agent. The waterborne ultraviolet-heat dual-cured coating has high hardness and is foam-resistant and environment-friendly, and toxic and harmful gas is not released. The invention also provides a preparation method for the waterborne ultraviolet-heat dual-cured coating.

Description

technical field [0001] The invention relates to the field of paint and its preparation, in particular to a water-based ultraviolet-heat dual-curing paint and a preparation method thereof. Background technique [0002] Coating is a kind of liquid or solid material that is coated on the surface of an object and can form a thin film under certain conditions to protect, decorate or have other special functions (insulation, rust prevention, mildew resistance, heat resistance, etc.). With the development of various industries in the national economy, the coating industry as a supporting tool has gradually developed from a very unobtrusive small industry to an indispensable important industry in various fields of the national economy. At present, the most important coatings used in my country are photocuring and thermal curing coatings. [0003] UV-curable coating, also known as photosensitive coating, is a kind of coating that uses ultraviolet light as the curing energy of the co...

Claims

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Application Information

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IPC IPC(8): C09D4/02C09D4/06
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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