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Preparation method of heat-resistant powdery coating

A powder coating, heat-resistant technology, applied in powder coatings, epoxy resin coatings, chemical instruments and methods, etc., can solve the problems of affecting product appearance performance, affecting heat resistance durability, poor leveling, etc., to overcome needles Pore ​​air bubbles, improvement of surface decoration, and effect of improving compatibility

Inactive Publication Date: 2015-11-04
ANHUI HUAHUI SUYE TECH SHARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing epoxy resin heat-resistant powder coatings have the problem of poor leveling during coating, which not only affects the appearance of the product, but also affects the durability of its heat resistance to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The formula of heat-resistant powder coating is as follows:

[0024] nano-SiO 2 30 parts epoxy resin

[0025] 2 parts low melting point glass powder

[0026] Hardener 2 parts

[0027] Flame retardant 2 parts

[0028] Mica powder 20 parts

[0029] Calcium silicate 20 parts

[0030] Degasser 0.5 part

[0031] Leveling agent 0.5 parts

[0032] 3 parts chrome copper pigment

[0033] Antioxidant 0.5 part.

[0034] The curing agent in the formula is trimellitic anhydride-imidazolate, the flame retardant is a mixture of magnesium hydroxide and aluminum hydroxide, the weight ratio of magnesium hydroxide to aluminum hydroxide is 1:1, the degassing agent is benzoin, and the leveling agent is The agent is hydroxymethyl cellulose, and the antioxidant is compound antioxidant JY-215.

Embodiment 2

[0036] The formula of heat-resistant powder coating is as follows:

[0037] nano-SiO 2 40 parts epoxy resin

[0038] 3 parts low-melting glass powder

[0039] Curing agent 5 parts

[0040] Flame retardant 5 parts

[0041] 30 parts mica powder

[0042] Calcium silicate 30 parts

[0043] Degasser 1 part

[0044] Leveling agent 1 part

[0045] Chromium copper pigment 5 parts

[0046] Antioxidant 1 part.

[0047] The selection of each component in the formula is the same as in Example 1.

Embodiment 3

[0049] The formula of heat-resistant powder coating is as follows:

[0050] nano-SiO 2 20 parts epoxy resin

[0051] 1 part low-melting point glass powder

[0052] Curing agent 1 part

[0053] 1 part flame retardant

[0054] Mica powder 10 parts

[0055] Calcium silicate 10 parts

[0056] Degasser 0.1 part

[0057] Leveling agent 0.1 parts

[0058] 1 part chrome copper pigment

[0059] Antioxidant 0.1 part.

[0060] The selection of each component in the formula is the same as in Example 1.

[0061] The preparation steps of heat-resistant powder coating in embodiment 1-3 are as follows:

[0062] (1) Nano SiO 2 The preparation of epoxy resin is: in the state of stirring, the dried nano-SiO 2 Add it to the acetone solution with coupling agent, then treat it with ultrasonic waves for 20 minutes, then stir the solution and epoxy resin evenly, remove the solvent, raise the temperature to 130°C for 1 hour, and cool it down.

[0063] (2) Weigh all the components and mix ...

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PUM

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Abstract

The invention discloses a preparation method of a heat-resistant powdery coating. The preparation method utilizes a two-step crushing method to prepare the heat-resistant powdery coating with uniform particle sizes, improves formula component compatibility, solves the problem of appearance defects such as pin holes and bubbles produced in curing of the conventional epoxy resin powdery coating and greatly improves surface decoration effects and high temperature resistance of a coated product.

Description

technical field [0001] The invention belongs to the technical field of chemical coatings, and relates to a preparation method of heat-resistant powder coatings. Background technique [0002] Heat-resistant powder coatings refer to protective powder coatings that can withstand high temperatures above 200°C for a long time without discoloration or damage to the coating film, and can still maintain appropriate physical and mechanical properties. Usually, high-temperature-resistant powder coatings are mainly composed of high-temperature-resistant resins, high-temperature-resistant pigments, high-temperature-resistant fillers and special effect additives. [0003] At present, heat-resistant powder coatings are still dominated by silicone powder coatings. Although silicone powder coatings have relatively high heat resistance, their prices are high, their initial appearance and mechanical properties are not very good, the curing temperature is high, and long-term durability is req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/12C09D5/03C09C1/28C09C3/00
Inventor 费邦忠
Owner ANHUI HUAHUI SUYE TECH SHARE CO LTD
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