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Low temperature solidified powder paint used for coating medium density fiber board and its production technology

A powder coating and fiberboard technology, applied in powder coatings, epoxy resin coatings, coatings, etc., can solve the problems of complex process and many restrictions on the shape of the workpiece, and achieve simple coating process, excellent adhesion, and few processes. Effect

Inactive Publication Date: 2007-04-18
广州电器科学研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the coating of MDF mainly adopts spray paint or film pressing process, both of which use a large amount of solvent, and the process is complicated, and there are many restrictions on the shape of the workpiece

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The present invention is used for the low-temperature curing powder paint of medium density fiberboard (MDF) coating, and its component and weight proportion are:

[0023] Epoxy resin with an epoxy equivalent weight of 740 (g / eq) 100

[0024] Carboxyl resin with an acid value of 62 (mgKOH / g) 100

[0025] Barium sulfate 20

[0026] Quartz Powder 20

[0027] Acrylic leveling agent 3.5

[0028] Benzoin 2.0

[0029] Booster 0.8

[0030] breather 3

[0031] Hardener 3.5

[0032] The production process of the low-temperature curing powder coating used for medium-density fiberboard coating of the present invention is: the above-mentioned materials are weighed in proportion, placed in a mixing tank, mixed and crushed for 2 minutes, and then entered into a twin-screw extruder for extrusion. The heating temperature of the extruder is controlled at 100°C, and the extruded product is tabletted and crushed, and then crushed to 40 micron powder particles with an ACM mill, then...

Embodiment 2

[0034] The present invention is used for the low-temperature curing powder paint of medium density fiberboard (MDF) coating, and its component and weight proportion are:

[0035] Epoxy resin with an epoxy equivalent of 900 (g / eq) 120

[0036] Carboxyl resin with an acid value of 85 (mgKOH / g) 120

[0037] Barium sulfate 25

[0038] Quartz Powder 20

[0039] Acrylic leveling agent 3.5

[0040] Benzoin 1.5

[0041] Booster 1

[0042] Breathing agent 2.5

[0043] Hardener 3.5

[0044] The production process of the low-temperature curing powder coating used for medium density fiberboard coating of the present invention is: the above-mentioned materials are weighed in proportion, placed in a mixing tank, mixed and crushed for 2 minutes, and then entered into a twin or single-screw extruder for extrusion , the heating temperature of the extruder is controlled at 90°C, and the extruded product is tabletted and crushed, and then crushed to 30 micron powder particles with an ACM ...

Embodiment 3

[0046] The present invention is used for the low-temperature curing powder paint of medium density fiberboard (MDF) coating, and its component and weight proportion are:

[0047] Epoxy resin with an epoxy equivalent weight of 740 (g / eq) 100

[0048] Carboxyl resin with an acid value of 62 (mgKOH / g) 100

[0049] Calcium carbonate 40

[0050] Quartz Powder 20

[0051] Acrylic leveling agent 3.5

[0052] Benzoin 1.5

[0053] Booster 0.9

[0054] Breathing agent 2.5

[0055] Hardener 3.5

[0056] Sanding agent 1

[0057] paint 1

[0058] The production process of the low-temperature curing powder coating used for medium density fiberboard coating of the present invention is: the above-mentioned materials are weighed in proportion, placed in a mixing tank, mixed and crushed for 3 minutes, and then entered into a twin or single-screw extruder for extrusion , the heating temperature of the extruder is controlled at 110°C, the extruded product is tabletted and crushed, and th...

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Abstract

This invention provides a low temp.solidification powder coating using for middle density fibrous lamina painting, and its components include epoxy resin which is of 500-1000g / Eq epoxy equivalent, carboxy-resin of 30-100mgKOH / g oate, inorganic bulking agent, benzoin, acrylate type leveling agents,growth agent, ventilating agent, harden agent,texturizing additives pigment and so on. This invention also provides its producing craft.It is a very ideal choice for painting middle density fibrous lamina with this powder coating in static electricity way. Its main features are: (1) Powder coating produces no solvent during spray painting and baking, so the excessive powder can be reclaimed. (2)Paint craft is simple and fewer processes. (3)Powder coating possesses much outstanding adhesive power, hardness, anti-impact ability, abradability and anti-chemical ability, so coating is difficult to be destroyed. (4)Powder coating provide the designation of MDF shape more flexibility, so it is very suitable for irregularly shaped contour's painting, and the painting product can be mp seam on rim.

Description

technical field [0001] The invention relates to a powder coating, in particular to a low-temperature curing powder coating for medium density fiberboard (MDF) coating, and simultaneously the invention also relates to a production process of the powder coating. Background technique [0002] Due to its extremely low volatile organic compound (VOC) emissions and environmental friendliness, powder coatings have replaced solvent-based coatings in many fields. However, due to electrostatic spraying and high-temperature curing (greater than 180°C), powder coatings are mostly used, which limits their application on insulating materials and heat-sensitive materials, such as paper, wood and plastics. [0003] my country's wood-based panel industry has developed rapidly, among which the production capacity of medium-density fiberboard (MDF) in 2002 was 13.618 million m 3 , ranking first in the world. MDF has been widely recognized by users due to its strong versatility and convenient...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D201/08C09D7/00C09D5/03
Inventor 章晓斌高庆福杨璠甘灯河顾宇昕
Owner 广州电器科学研究院
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