Coating technology of finishing varnish on integrated plate

It is a technology of finishing varnish and coating process, which can be applied to the device, coating, pretreatment surface and other directions of coating liquid on the surface, which can solve the problems of large color difference and poor adhesion, achieve small color difference, improve water resistance, Reduced toxic and irritating effects

Active Publication Date: 2020-09-29
NIPPON PAINT CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is only applicable to the field of wood boards and furniture, and there will still be problems of large color difference and poor adhesion when applied in the field of exterior wall integrated boards

Method used

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  • Coating technology of finishing varnish on integrated plate
  • Coating technology of finishing varnish on integrated plate
  • Coating technology of finishing varnish on integrated plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] With 48 parts by weight of UV-curable water-based polyurethane dispersion, 40 parts by weight of acrylate emulsion, 0.5 parts by weight of silane coupling agent, 0.1 parts by weight of fluorocarbon surfactant, 20 parts by weight of water and 1.4 parts by weight of auxiliary After the agent is mixed, it is fully stirred, and then 0.5 parts by weight of a photoinitiator and 2 parts by weight of a light stabilizer are added and fully stirred to obtain a finish varnish.

[0048] Examples 2-4 The raw material composition of the finish varnish prepared according to the method of Example 1 is shown in Table 1.

[0049] Table 1: Raw materials and specific parts by weight of each embodiment

[0050]

[0051]

[0052] Wherein embodiment 1-4 relates to its raw material source of UV curing aqueous polyurethane dispersion, acrylate emulsion, auxiliary agent, silane coupling agent, fluorocarbon surfactant, photoinitiator, light stabilizer as shown in Table 2 Show.

[0053] Ta...

Embodiment 5

[0056] The finish varnish that makes according to embodiment 1 carries out painting process, and concrete steps are as follows:

[0057] (1) Apply the first finish varnish: evenly roll or spray a layer of finish varnish on the surface of the substrate;

[0058] (2) Infrared drying of the first finish varnish: dry the substrate on which the first finish varnish is rolled or sprayed in step (1) with infrared rays for 1 min;

[0059] (3) Coating the second finish varnish: evenly roll coating or spraying one deck finish varnish on the varnish surface after step (2) infrared drying of the finish varnish;

[0060] (4) Infrared drying of the second finish varnish: dry the substrate on which the finish varnish is rolled or sprayed in step (3) with infrared rays for 1 min;

[0061] (5) Dehydration and flash-drying: place the dried substrate of the overcoat varnish in step (4) in an oven at 75°C for 15 minutes to flash-dry;

[0062] (6) UV curing: the substrate after drying in step (5...

Embodiment 4

[0117] This test example investigates the influence of different post-heat treatment conditions on the technical indicators of finish varnish curing and film formation. Specifically, for the finish varnish prepared in Example 1, the coating process of Example 5 was followed, except for the post-heat treatment conditions, other coating process parameters were the same as in Example 5, and the results are shown in Table 9.

[0118] Table 9: Comparison of technical indicators of overcoat varnish curing and film formation under different post-heat treatment conditions

[0119]

[0120] From the above test results, it can be seen that when the post-heat treatment conditions are 70-100°C, 0-15min, the appearance, adhesion, hardness, aging resistance and other properties of the coating film are better, and the post-heat treatment conditions are 70-90°C, 5- The performance is the best at 10 minutes, and the post-heat treatment is used at the same time. Compared with the non-post-he...

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Abstract

The invention belongs to the field of the finishing varnish coating technology and particularly discloses a coating technology of finishing varnish on an integrated plate. The coating technology comprises drying and solidifying; drying comprises dewatering for dry flash-over and later thermal treatment; dewatering for dry flash-over refers to rapid determing treatment before solidification; and later thermal treatment refers to heating treatment after solidification. The coating technology is suitable for the field of outer wall integrated plates and is excellent in coating effect, high in coating adhesion and small in color difference.

Description

technical field [0001] The invention belongs to the field of paint coating technology, and in particular relates to a coating technology of finish varnish on an integrated board. Background technique [0002] At present, water-based UV coatings are mainly used in the field of wooden floors and furniture, while the application of prefabricated integrated panels for exterior walls, including new composite materials, flexible veneer materials, inorganic panels, etc., has some application difficulties, resulting in it being unable to be widely used . The main reason is that when it is applied on the exterior wall integrated board, the requirements for water-based UV coatings are higher, as follows: 1) Because it is used outdoors, it has higher requirements for weather resistance (yellowing resistance, stain resistance); 2) Since the substrate of the integrated board is mainly colorful, real stone paint, and texture, the density of the substrate is much higher than that of wood....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/02B05D3/06B05D7/00C09D175/14C09D133/04C09D125/14C09D131/04C09D7/63C09D7/20
CPCB05D3/0254B05D3/067B05D3/0263B05D7/534C09D175/14C09D7/63C09D7/20C08L33/04C08L43/04C08L25/14C08L31/04C08K5/54Y02P20/10
Inventor 黄频吴春春高双之
Owner NIPPON PAINT CHINA
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