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Powder coating for banding edge of heat sensitive substrate as well as edge banding coating and preparation method thereof

A technology for heat-sensitive substrates and powder coatings, applied in powder coatings, coatings, epoxy resin coatings, etc. Poor application penetration and other problems, to achieve the effect of excellent leveling performance and fast curing performance, excellent curing crosslinking performance, excellent mechanical strength

Inactive Publication Date: 2014-05-14
TIGER DRYLAC TAICANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The applicant tested various disclosed improvement schemes in the background technology, and found that they all used pre-sealing of heat-sensitive substrates in order to avoid the problem of cracks in the existing commercial powder coating spraying, specifically, If hot melt adhesive is used to apply edge banding, or UV-curable UV-curable coating is used to coat edge banding, although a certain procedure solves the problem of cracks caused by spraying conventional low-temperature curing powder coatings, the edge banding process is complicated and not suitable Edge sealing is performed on heat-sensitive substrates with complex shapes and structures. At the same time, the penetration of liquid application is poor, and thick coating cannot be achieved, which limits the strength and leveling of the edge sealing coating, and ultimately cannot produce high quality The heat-sensitive substrate edge-banding coating makes the application of powder coatings on the heat-sensitive substrate edge-banding subject to extremely difficult restrictions

Method used

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  • Powder coating for banding edge of heat sensitive substrate as well as edge banding coating and preparation method thereof
  • Powder coating for banding edge of heat sensitive substrate as well as edge banding coating and preparation method thereof
  • Powder coating for banding edge of heat sensitive substrate as well as edge banding coating and preparation method thereof

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preparation example Construction

[0043] The embodiment of the present invention also discloses a preparation method of the above-mentioned powder coating for heat-sensitive substrate edge sealing, wherein the operation steps include the following:

[0044] a), put all the raw materials in the above parts by weight into the mixing tank and mix to obtain the mixing;

[0045] b), placing the mixture obtained in the above step a) in an extruder for melt extrusion, and then cooling to obtain a tablet material;

[0046] c), the tableting material obtained in the above step b) is first coarsely pulverized and then ground to obtain a fine powder;

[0047] d), the fine powder obtained in the above step c) is separated by a cyclone separator, classified and sieved, tested and finished;

[0048] e), completing the preparation of the powder coating for edge banding of heat-sensitive substrates.

[0049] The embodiment of the present invention also discloses an edge-sealing coating for heat-sensitive substrates, which i...

Embodiment 1

[0055] A heat-sensitive base material edge sealing powder coating, wherein the powder coating comprises the following raw materials in parts by weight:

[0056] 63 parts of epoxy resin, wherein, epoxy resin is prepared by adopting semi-crystalline or full crystallization or superesterification process, and is used to reduce viscosity and improve curing speed. Specifically, in this embodiment, epoxy resin is obtained by adopting full Prepared by crystallization process;

[0057] 10 parts of curing agent, used to produce curing crosslinking reaction with epoxy resin; preferably, the curing agent is prepared by mixing one or more highly active curing agents to improve the strength of curing crosslinking reaction, more preferably, The highly active curing agent is any one or a mixture of imidazoline, hydrazide, and phenolic curing agents. Specifically, in this embodiment, the curing agent is an imidazoline highly active curing agent;

[0058] 20 parts of pigments and fillers, pre...

Embodiment 2

[0070] All the other technical solutions of this embodiment 2 are the same as those of the above-mentioned embodiment 1, the only difference being that the powder coating comprises the following raw materials in parts by weight:

[0071] 25 parts of epoxy resin;

[0072] 20 parts of curing agent;

[0073]35 parts of pigments and fillers;

[0074] 20 parts of auxiliary agent, specifically, in the mentioned embodiment, the auxiliary agent includes 3 parts of leveling agent, 5 parts of rheological agent, 5 parts of viscosity reducer, 3 parts of degassing agent and 4 parts of defoamer.

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Abstract

The invention relates to a powder coating for banding the edge of a heat sensitive substrate as well as an edge banding coating and a preparation method of the powder coating. The powder coating comprises the following raw materials in parts by weight: 25-70 parts of epoxy resin, 2-20 parts of curing agent, 5-35 parts of pigment and filler and 0-20 parts of auxiliary agent, wherein the curing agent is used for having crosslinking curing reaction with the epoxy resin; the epoxy resin is prepared by a hypocrystallization, holocrystallization or super esterification technology and is used for reducing the viscosity and increasing the curing speed. The powder coating has good edge banding effect for the heat sensitive substrate and is capable of effectively avoiding the side of the heat sensitive substrate cracking; furthermore, electrostatic spraying is realized; the edge banding technology is simple and convenient, and the powder coating is suitable for banding the edges of substrates with various shapes.

Description

technical field [0001] The invention relates to a heat-sensitive substrate edge-sealing technology, in particular to a powder coating for heat-sensitive substrate edge-sealing, an edge-sealing coating, and a preparation method thereof. Background technique [0002] Thermosetting powder coatings are widely used in various fields due to their advantages of no organic solvent, good environmental protection, high utilization rate, and convenient storage and transportation. Due to the heat sensitivity of heat-sensitive substrates (such as wood, fiberboard, plastic, cement board, etc.), conventional thermosetting powder coatings cannot be directly applied to heat-sensitive substrates. With the development of modern science and technology, there are many low-temperature curing powder coatings for heat-sensitive substrates. However, the following problems still exist in the actual production process: [0003] When the heat-sensitive substrate is baked and cured after the low-temper...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/03C09D7/12
Inventor 刘际平高志豪顾颂文
Owner TIGER DRYLAC TAICANG
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