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High-temperature-resistant powder paint preparation method

A powder coating, high temperature resistant technology, applied in powder coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of high cost, promotion and use, etc.

Active Publication Date: 2013-09-25
ZHEJIANG HUACAI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is more environmentally friendly than oil-based coatings, its popularization is limited due to its high cost and the need for high-temperature curing (the minimum curing condition is 230°C×20 minutes).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Accurately weigh the materials according to the formula shown in Table 1, and place them in a high-speed mixer to mix for 6-8 minutes; after the materials are mixed, use an extruder to extrude at a temperature of 90-100°C; after the extrudate is cooled and broken, use a pulverizer It is crushed into powder particles with an average particle size of 30-33 microns; then sieved with a 180-mesh screen, and finally packaged into a finished product.

[0041] Table 1 Normal temperature curing high temperature resistant (600℃) low-cost black sand grain powder coating formula (weight percentage)

[0042] Material

%

Silicone resin

25

Epoxy resin

13

polyester resin

13

Low melting point glass powder

20

Ferromanganese Black

8

Mica powder

19

Sand texture agent

0.3

Hardener

0.7

Leveling agent

1

[0043] According to the powder coating obtained in the above examples, the following spraying and testing process is adopted: the finished product is sprayed on a 0.6mm iro...

Embodiment 2

[0047] Accurately weigh the materials according to the formula shown in Table 3 and place them in a high-speed mixer to mix for 6-8 minutes; after the materials are mixed, use an extruder to extrude at a temperature of 90-100°C; after the extrudate is cooled and broken, use a pulverizer It is crushed into powder particles with an average particle size of 30-33 microns; then sieved with a 180-mesh screen, and finally packaged into a finished product.

[0048] Table 3 Normal temperature curing high temperature resistant (600℃) low-cost black sand grain powder coating formula (weight percentage)

[0049] Material

%

Silicone resin

25

Epoxy resin

10

[0050] polyester resin

15

Low melting point glass powder

20

Ferromanganese Black

8

Mica powder

20

Sand texture agent

0.3

Hardener

0.7

Leveling agent

1

[0051] According to the powder coating obtained in the above examples, the following spraying and testing process is adopted: the finished product is sprayed on ...

Embodiment 3

[0055] Accurately weigh the materials according to the formula shown in Table 5 and place them in a high-speed mixer to mix for 6-8 minutes; after the materials are mixed, use an extruder to extrude at a temperature of 90-100°C; after the extrudate is cooled and broken, use a pulverizer It is crushed into powder particles with an average particle size of 30-33 microns; then sieved with a 180-mesh screen, and finally packaged into a finished product.

[0056] Table 5 Normal temperature curing high temperature resistant (600℃) low-cost black sand grain powder coating formula (weight percentage)

[0057] Material

%

Silicone resin

30

Epoxy resin

10

polyester resin

10

Low melting point glass powder

20

Ferromanganese Black

8

Mica powder

15

Sand texture agent

0.3

Hardener

0.7

[0058] Leveling agent

1

[0059] According to the powder coating obtained in the above examples, the following spraying and testing process is adopted: the finished product is sprayed on ...

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Abstract

The invention relates to powder paint, and especially relates to a high-temperature-resistant powder paint preparation method. The powder paint is prepared from the materials of: silicone resin, epoxy resin, polyester resin, low-melting-point glass powder, and mica powder. According to the method, the materials are precisely weighed according to a composition, and are mixed for 6-8min in a high-speed mixer; the mixed material is extruded under a temperature of 90-100 DEG C by using an extruder; the extruded material is cooled and crushed, and is crushed into powder particles with an average particle size of 30-33 micrometers; the powder is sieved by using a 180-mesh sieve; and the finished product is packaged. According to the technical scheme provided by the invention, silicone resin and normal-temperature-cured conventional resin are blended, such that the entire system can be cured and crosslinked into a film under normal temperature, and has excellent physical performances. The silicone resin can resist temperature of at least 500 DEG C. Before the low-melting-point glass powder is formed into a film, a coating is prevented from cracking and falling.

Description

Technical field [0001] The invention relates to powder coatings, in particular to a method for preparing high temperature resistant powder coatings. technical background [0002] High temperature resistant powder coatings can be widely used in various high temperature resistant equipment in the electrical appliances, metallurgy, petroleum, aviation, chemical, pharmaceutical, food and other industries (for example: barbecue stoves, heaters, high-power lighting, heating pipes, cars and motorcycles Heater, high-temperature furnace, chimney, etc.). Although it is more environmentally friendly than oil-based coatings, its high cost and need for high temperature curing (curing conditions of at least 230℃×20 minutes) restrict its popularization. The development of low-cost room temperature curing high temperature resistant powder coatings can enable environmentally friendly powder coatings to be used in the above-mentioned high temperature resistant equipment instead of paint. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/00C09D163/00C09D167/00C09D7/12C09D5/03
Inventor 孙华强
Owner ZHEJIANG HUACAI NEW MATERIAL CO LTD
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