Cement board

A cement board and board body technology, applied in coatings, building materials, powder coatings, etc., can solve the problems of complex edge sealing process, unsuitable for cement board, and inability to achieve thick coating, and achieve simple and convenient edge sealing process. The effect of mechanical strength requirements

Inactive Publication Date: 2014-05-07
TIGER DRYLAC TAICANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The applicant has tested various disclosed improvement schemes in the background technology, and found that they are all in order to avoid the problem of cracks existing in the existing commercialized powder coating spraying, and adopt the cement board to carry out edge sealing in advance, specifically, as Use hot melt adhesive to apply edge banding, or use UV-curable UV-curable coating to apply edge banding. Although a certain procedure solves the problem of cracks caused by spraying with conventional low-temperature curing powder coatings, the edge banding process is complicated and is not suitable for The cement board with complex shape and structure is used for edge sealing, and the penetration of liquid application is poor, and thick coating cannot be achieved, so that the strength and leveling of the edge sealing coating are limited, and ultimately it is impossible to produce high-quality cement Coating of board edge seals, making the application of powder coatings on cement board edge seals subject to extremely difficult constraints

Method used

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  • Cement board
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Examples

Experimental program
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Effect test

Embodiment 1

[0046] See figure 2 As shown, a cement board includes a cement board body 100, the side of the board body has an edge-seal coating 200, and the edge-seal coating 200 and the surface of the board body 100 are provided with a thermosetting coating 300, wherein the edge-seal coating The layer 200 is obtained by electrostatic spraying and infrared spectrum curing on the side of the plate body 100 with powder coating for edge sealing. The specific wavelength range of the infrared spectrum is 100-300 μm. Certainly, in other specific implementation manners, infrared spectra of other specific wavelength ranges may also be selected.

[0047] In this embodiment, the powder coating for edge sealing includes the following raw materials in parts by weight:

[0048] 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 emb...

Embodiment 2

[0062] The rest of the 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 for edge sealing includes the following raw materials in parts by weight:

[0063] 25 parts of epoxy resin;

[0064] 20 parts of curing agent;

[0065] 35 parts of pigments and fillers;

[0066] 20 parts of auxiliary agent, specifically, in this 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.

Embodiment 3

[0068] The remaining technical solutions of this embodiment 3 are the same as those of the above-mentioned embodiment 1, and the only difference is that the powder coating for edge sealing includes the following raw materials in parts by weight:

[0069] 30 parts of epoxy resin;

[0070] 18 parts of curing agent;

[0071] 32 parts of pigments and fillers;

[0072] 20 parts of auxiliary agent, specifically, in this 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 cement board. The cement board comprises a board body, wherein an edge-sealing coating layer is arranged on the side surface of the board body; thermosetting coating layers are arranged on the edge-sealing coating layer and the surface of the board body; the edge-sealing coating layer is obtained by performing electrostatic spraying and solidification treatment on the side surface of the board body through a powder coating for edge sealing; the thermosetting coating layers are obtained by performing electrostatic spraying and solidification treatment on the edge-sealing coating layer and the surface of the board body through a powder coating for low-temperature solidification. A good edge-sealing effect on the cement board is achieved, the side surface of the cement board is effectively prevented from being cracked, and an edge-sealing process is simple and convenient due to the adoption of the electrostatic spraying, and is suitable for edge sealing of base material work-pieces of various shapes.

Description

technical field [0001] The invention relates to a board, in particular to a cement board. 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] Heat-sensitive substrates such as cement boards will crack on the side of the substrate during the baking and curing process after spraying of low-temperature curing powder coatings and after curing. This is because th...

Claims

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Application Information

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IPC IPC(8): E04C2/04C09D163/00C09D167/06C09D167/00C09D5/03
Inventor 刘际平高志豪顾颂文
Owner TIGER DRYLAC TAICANG
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