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Epoxy low temperature curable powder paint and preparation method thereof

A powder coating, low temperature technology, applied in the field of coatings, can solve the problems of poor leveling, easy pinholes on the surface of the coating film, unsightly appearance, etc., to improve the powder coating rate on the corners, excellent chemical corrosion resistance and electrical Good insulation performance and surface gloss

Inactive Publication Date: 2017-11-28
ZHANGJIAGANG JIANGNAN POWDER COATING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the other hand, in the spraying test, we found that the appearance and leveling of the coating film formed by spraying the pure epoxy low-temperature curing epoxy powder coating on the surface of tinplate, aluminum profile, galvanized steel plate, and the inner and outer walls of the pipe are better, but When spraying on the surface of castings, porous substrates and workpieces with complex structures, the powder on the corners is low, pinholes are prone to appear on the surface of the coating film, the leveling property is poor, and the appearance is not beautiful enough

Method used

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  • Epoxy low temperature curable powder paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of epoxy low-temperature curing powder coating, is made up of following parts by weight:

[0038] 35 parts of epoxy resin;

[0039] 20 parts of precipitated barium sulfate and active silica fume filler;

[0040] 0.05 parts of benzyltriethylammonium chloride;

[0041] 5 parts of inorganic pigments;

[0042] 3.5 parts of curing agent;

[0043] 0.5 part of curing aid;

[0044] 1.5 parts of wetting agent;

[0045] Rosin 0.2 parts;

[0046] Other additives 0.5-3 parts. Other additives are composed of components: leveling agent, dispersing agent, brightening agent, degassing agent, antioxidant, leveling agent is carboxymethyl cellulose; dispersing agent is calcium stearate; brightening agent is acrylate Copolymer; degassing agent is modified silicone oil; antioxidant is 2,6-tertiary butyl-4-methylphenol.

[0047] The epoxy resin is a hydrogenated bisphenol A type epoxy resin.

[0048] The wetting agent is selected from pull open powder BX.

Embodiment 2

[0050] A kind of epoxy low-temperature curing powder coating, is made up of following parts by weight:

[0051] 50 parts of epoxy resin;

[0052] 30 parts of precipitated barium sulfate and active silica fume filler;

[0053] 0.5 parts of benzyltriethylammonium chloride;

[0054] 15 parts of inorganic pigments;

[0055] 5.5 parts of curing agent;

[0056] 1.5 parts of curing aid;

[0057] 2.5 parts of wetting agent;

[0058] Rosin 0.5 part;

[0059] 3 parts of other additives.

[0060] Other additives are composed of components: leveling agent, dispersant, brightening agent, degassing agent, antioxidant. The leveling agent is carboxymethyl cellulose; the dispersant is calcium stearate; the brightener is acrylic ester copolymer; the degassing agent is modified silicone oil; the antioxidant is 2,6-tertiary butyl-4- methyl phenol.

[0061] The epoxy resin is a hydrogenated bisphenol A type epoxy resin.

[0062] The wetting agent is selected from pull open powder BX.

Embodiment 3

[0064] A preparation method for medium density fiberboard powder coating, comprising the following steps:

[0065]P1 mixed, the epoxy resin disclosed in Example 1 and Example 2, precipitated barium sulfate and active silica fume powder filler, benzyl triethylammonium chloride, inorganic pigment, curing agent, curing aid, other auxiliary The agent is mixed according to the parts by weight. After the mixing is completed, it is fully stirred at 65°C-80°C, and the wetting agent is added according to the parts by weight while stirring, and the mixture is uniform;

[0066] P2 is melted, and after the mixing is completed, add rosin weighed in parts by weight and melt and extrude together;

[0067] P3 tableting, tableting while cooling;

[0068] P4 is pulverized, and the coating after P3 tableting is pulverized;

[0069] P5 is sieved and passed through a 160 mesh sieve.

[0070] During the P2 melting process, the melting temperature is set in a 3-stage gradient, melting at 110°C fo...

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Abstract

The invention provides an epoxy low temperature curable powder paint and a preparation method thereof. The epoxy low temperature curable powder paint is composed of the following components: epoxy resin; precipitated barium sulfate and activated silica powder filler; benzyltriethylamine chloride; inorganic pigment; a curing agent; a curing assistant; a wetting agent; rosin; and other assistants. The invention also discloses a preparation method of the epoxy low temperature curable powder paint. The method includes the steps of: mixing, melting, tabletting, crushing and sieving. The powder paint provided by the invention not only improves the corner powdering rate, but also improves the coating film appearance and various physical properties, has the advantages of good layer compactness, adhesion, impact strength and toughness, high corner coverage rate, and excellent chemical corrosion resistance and electrical insulation performance.

Description

technical field [0001] The invention relates to a coating, in particular to an epoxy low-temperature curing powder coating and a preparation method thereof. Background technique [0002] Powder coating is a rapidly developing field in the entire coating technology, especially since the 21st century, because its VOC emission is almost zero, environmental protection requirements have driven its rapid development. Global and Chinese environmental protection regulations are becoming more and more stringent, effectively promoting the development of the environmentally friendly powder coating industry. However, the curing temperature of general-purpose powder coatings is relatively high, which limits them to those substrates that can withstand high temperatures, such as metals. The development of a powder coating system that can be cured at low temperature (130°C) can greatly expand the application field of powder coatings and make it possible to coat heat-sensitive substrates (s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/03C09D7/12
CPCC09D163/00C08K2003/3045C08L2205/035C09D5/033C08L93/04C08K13/02C08K3/30C08K3/36C08K5/19
Inventor 黎永新田晖华鹤林陈传东
Owner ZHANGJIAGANG JIANGNAN POWDER COATING
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