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Pure epoxy powder coating for coating bakelite board and preparation method thereof

A technology of powder coating and epoxy type, applied in the direction of powder coating, epoxy resin coating, coating, etc., can solve the problems of high film forming temperature, long curing time, unfavorable production cost and production efficiency, etc., and achieve the goal of coating process Simple, good decorative effect, excellent adhesion effect

Inactive Publication Date: 2010-05-19
GUANGZHOU QINGTIAN INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Whether the early powder coatings are thermoplastic or thermosetting, the film-forming temperature is very high, and generally need to be baked at 180 ° C for 10 to 20 minutes, so that its application is limited to heat-resistant substrates such as metals, and cannot be applied to heat-sensitive substrates. Such as bakelite board, MDF board, etc.
On the other hand, as the curing temperature increases, the energy consumption increases accordingly. According to research, every 10°C decrease in the curing temperature can save about 10% of the coating energy; The residence time in the baking room is not good for production cost and production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The components and weight proportions of pure epoxy powder coatings for bakelite coating are:

[0028] Epoxy equivalent is 200 parts of epoxy resin of 740g / eq

[0029] 20 parts of 4,4'methylenebis(phenyldimethylurea)

[0030] Titanium dioxide 80 parts

[0031] Barium sulfate 20 parts

[0032] Acrylic leveling agent 2.4 parts

[0033] Benzoin 1.2 parts

[0034] 1.5 parts of defoamer

[0035] Charge enhancer 1.2 parts

[0036] Preparation:

[0037] (a) Weigh each component according to the proportion, place it in a mixing tank, fully mix and crush for 5 minutes;

[0038] (b) The crushed material is extruded into a twin or single screw extruder; the heating temperature of the extruder is controlled at 90°C;

[0039] (c) The extruded material is compressed into tablets, cooled, pulverized into a powder with a particle size (equivalent particle size D50) of 50 microns, and then sieved and packaged.

Embodiment 2

[0041] The components and weight proportions of pure epoxy powder coatings for bakelite coating are:

[0042] Epoxy equivalent is 150 parts of epoxy resin of 650g / eq

[0043] 10 parts of 2-ethyl-4-methylimidazole

[0044] Titanium dioxide 80 parts

[0045] Calcium carbonate 20 parts

[0046] Mica powder 20 parts

[0047] Acrylic leveling agent 3 parts

[0048] Benzoin 1.5 parts

[0049] 1.5 parts of defoamer

[0050] Charge enhancer 1.2 parts

[0051] Preparation:

[0052] (a) Weigh each component according to the formula ratio, place it in a mixing tank, fully mix and crush for 8 minutes;

[0053] (b) The crushed material is extruded into a twin-screw extruder; the heating temperature of the extruder is controlled at 85°C;

[0054] (c) The extruded material is compressed into tablets, cooled, pulverized into a powder with a particle size (equivalent particle size D50) of 60 microns, and then sieved and packaged.

Embodiment 3

[0056] The components and weight proportions of pure epoxy powder coatings for bakelite coating are:

[0057] Epoxy equivalent is 200 parts of epoxy resin of 1000g / eq

[0058] 30 parts of 4-toluene bis-dimethylurea

[0059] Titanium dioxide 70 parts

[0060] Silica powder 30 parts

[0061] Acrylic leveling agent 3 parts

[0062]Benzoin 1.5 parts

[0063] 2.5 parts of defoamer

[0064] Charge enhancer 1.5 parts

[0065] Preparation:

[0066] (a) Weigh each component according to the formula ratio, place it in a mixing tank, fully mix and crush for 5 minutes;

[0067] (b) The crushed material is extruded into a twin or single screw extruder; the heating temperature of the extruder is controlled at 90°C;

[0068] (c) The extruded material is compressed into tablets, cooled, pulverized into a powder with a particle size (equivalent particle size D50) of 50 microns, and then sieved and packaged.

[0069] The coating method of the pure epoxy powder coating used for coating ...

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Abstract

The invention discloses a pure epoxy powder coating for coating a bakelite board, which comprises the following components in part by weight: 100 to 200 parts of epoxy resin, 1 to 50 parts of epoxy hardener, 0 to 200 parts of inorganic filler and 0 to 10 parts of auxiliary agent. That the bakelite board is coated by the pure epoxy powder coating is an ideal method, which has the advantages that: (1) when the powder coating is sprayed and baked, no solvent is generated, and over-sprayed powder can be recycled; (2) the coating process is simple and has few procedures; (3) compared with paint, the powder coating has superior adhesion, hardness, impact resistance, wear resistance and chemical resistance, and a coat is difficult to damage; and (4) through formula adjustment, surface coats with any grains, colors and glosses can be obtained, and have excellent decorative effect.

Description

technical field [0001] The invention relates to a powder coating, in particular to a powder coating for coating bakelite boards, and simultaneously the invention also relates to a preparation method of the powder coating. Background technique [0002] Powder coating is a recognized 4E type coating product with high production efficiency, excellent film performance, eco-environmental protection and economy. With people's gradual attention to environmental protection, energy saving and other issues, as well as strict requirements for coating technology, powder coatings have many properties that were considered unattainable in the early 1980s. Powder coatings, like other green coatings, have gained worldwide popularity. improve dramatically. [0003] Whether the early powder coatings are thermoplastic or thermosetting, the film-forming temperature is very high, and generally need to be baked at 180 ° C for 10 to 20 minutes, so that its application is limited to heat-resistant ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/03C09D5/00
Inventor 胡百久高庆福杨璠张光东马会刚张捷
Owner GUANGZHOU QINGTIAN INDAL
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