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Spraying type ultraviolet cured woodware varnish

A clear topcoat and ultraviolet light technology, applied in the direction of coating, etc., can solve the problems of cracking of the coating film, improper use of additives, and high viscosity, and achieve the effect of avoiding cracking and preventing stress accumulation.

Inactive Publication Date: 2010-07-28
BEIJING AEROSPACE RATE MECHANICAL & ELECTRICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Previously, the research and development and production of UV coatings were concentrated on roller coating and flow coating. Spray-type UV coatings are products to be developed. There are few mature products on the market. Most of the products have the following problems: high viscosity, difficult operation, and poor leveling , high tension or improper use of additives, resulting in coating shrinkage, flexibility, hardness imbalance, resulting in cracking of the coating film, etc.

Method used

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  • Spraying type ultraviolet cured woodware varnish
  • Spraying type ultraviolet cured woodware varnish
  • Spraying type ultraviolet cured woodware varnish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Each component of table 4 embodiment 1 and its weight percentage content table

[0051]

[0052]Prepare 100g photocurable coating according to the formula shown in Table 4: get 22g bisphenol A epoxy acrylate, 12g trifunctionality aliphatic urethane acrylate, 6g hexafunctionality aliphatic urethane acrylate and mix, add 40g tripropylene glycol under stirring Diacrylate, 15g propoxylated trimethylolpropane triacrylate, 2.5g 1173 hydroxyketone photoinitiator, 2g 184 hydroxyketone photoinitiator, 0.25g 2700 substrate wetting agent and 0.25g 432 substrate wetting agent , to obtain UV-curable coatings.

[0053] The active oligomer includes bisphenol A epoxy acrylate with an acid value of 10-25 mgKOH / g.

[0054] Bisphenol A epoxy acrylate, trifunctional aliphatic urethane acrylate and hexafunctional aliphatic urethane acrylate are selected from the corresponding industrial grade products of Sartomer Company in the United States, and the code names are CN104, CN970A60 and C...

Embodiment 2

[0059] What is different from Example 1 is that the ratio of each component changes, specifically as follows:

[0060] Each component of table 5 embodiment 2 and its weight percentage content table

[0061]

Embodiment 3

[0063] What is different from Example 1 is that the ratio of each component changes, specifically as follows:

[0064] Each component of table 6 embodiment 3 and its weight percentage content table

[0065]

[0066]

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Abstract

The invention belongs to a coating, and in particular relates to a spraying type ultraviolet cured woodware varnish, which is particularly suitable for finishing various wood substrate (such as solid wood, veneers, flakeboards, density boards and the like) products. The spraying type ultraviolet cured woodware varnish consists of activated oligomer, an activated thinner, a photoinitiator and an aid, wherein the activated oligomer consists of bisphenol A epoxy acrylate, aliphatic polyurethane tri-acrylate and hexafunction aliphatic urethane acrylate; and the activated thinner consists of tripropylene glycol diacrylate and trimethylolpropane propoxylate triacrylate. By utilizing reasonable combination of various raw materials, the coating has the characteristics of low viscosity, good construction (spraying) performance, sufficient flexibility on the premise of hardly reducing hardness and the like, and the like, and effectively avoids the problems of orange peel, sinking and the like.

Description

technical field [0001] The invention belongs to a coating, and in particular relates to a spray-coated ultraviolet light-curing coating, which is especially suitable for topcoat finishing of various wooden substrates (such as solid wood, plywood, particle board, density board, etc.) products. Background technique [0002] Ultraviolet ray (abbreviated as UV) curing coatings (hereinafter referred to as UV coatings), due to its superior quality, high production efficiency, low cost, and good environmental performance, has developed rapidly since its inception, especially in wooden flooring. It is a high-quality product with great development prospects, and its application range is almost 100%. It is known as the direction of future coating development. However, the current coating methods of UV coatings are still mainly roller coating and curtain coating (suitable for high-viscosity coatings). This is mainly because UV coatings themselves are high-solid content coatings. It is ...

Claims

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Application Information

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IPC IPC(8): C09D4/02
Inventor 熊海洋李水冰郝云择潘智勇张聪
Owner BEIJING AEROSPACE RATE MECHANICAL & ELECTRICAL ENG CO LTD
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