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Low-temperature curing epoxy anticorrosive powder coating and preparation method thereof

A powder coating, low temperature technology, applied in the field of low temperature curing epoxy anti-corrosion powder coating and its preparation, can solve the problem of easy cracking of the coating, and achieve the effect of good low temperature curing performance

Inactive Publication Date: 2021-12-31
浙江双金粉末涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent document CN103666203A discloses a low-temperature fast-curing epoxy powder coating, which can be completely cured at 170°C / 2.5min, has excellent mechanical properties and anti-corrosion properties, but it is mainly suitable for pipelines with small bending deformation. The coating is easy to crack when it is used in fields requiring arbitrary deformation such as steel bars, steel bars and cables, and its use still has certain limitations

Method used

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  • Low-temperature curing epoxy anticorrosive powder coating and preparation method thereof
  • Low-temperature curing epoxy anticorrosive powder coating and preparation method thereof
  • Low-temperature curing epoxy anticorrosive powder coating and preparation method thereof

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Embodiment 1

[0034] A kind of low-temperature curing epoxy anticorrosion powder coating of the present embodiment, it is made up of the component of following parts by weight:

[0035]

[0036] Wherein, the epoxy value of the phenolic modified epoxy resin is 0.11-0.13eq / 100g, and the softening point is 100-110°C. The dispersant is an ammonium salt dispersant. The low-temperature curing agent is toluene-2,4-bis[N,N-dimethylaminopropaneurea]. The accelerator is dimethylimidazole. The leveling agent is leveling agent H88.

[0037] The preparation method of the low-temperature curing epoxy anticorrosion powder coating of the present embodiment, comprises the steps:

[0038] S1. According to the formula content, pour each component into the container for thorough mixing, the stirring speed is 2500-3000r / min, and the stirring time is 45-60min;

[0039] S2. Pass the mixture obtained in S1 through an extruder, and perform melt extrusion at a temperature of 80-90° C.; wherein the screw speed...

Embodiment 2

[0042] With reference to Example 1, different from Example 1, a kind of low-temperature curing epoxy anticorrosion powder coating of the present embodiment is made up of the following components by weight:

[0043]

[0044] The preparation method refers to Example 1.

Embodiment 3

[0046] With reference to Example 1, different from Example 1, a kind of low-temperature curing epoxy anticorrosion powder coating of the present embodiment is made up of the following components by weight:

[0047]

[0048]

[0049] The preparation method refers to Example 1.

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Abstract

The invention discloses a low-temperature curing epoxy anticorrosive powder coating and a preparation method thereof. The coating consists of the following components in parts by weight: 50-55 parts of phenolic modified epoxy resin, 12-18 parts of bisphenol A epoxy resin, 13-19 parts of a low-temperature curing agent, 2-6 parts of a leveling agent, 1-4 parts of an accelerant, 3-5 parts of a dispersant, 1-2 parts of a preservative, 8-12 parts of nano titanium dioxide, and 10-14 parts of graphene nanosheets. The coating disclosed by the invention has good low-temperature curing performance, corrosion resistance and mechanical property.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a low-temperature curing epoxy anticorrosion powder coating and a preparation method thereof. Background technique [0002] Powder coating is a kind of coating product with high production efficiency, excellent film performance, eco-environmental protection and economy. As a kind of powder coating, epoxy powder coating has the advantages of low melt viscosity, good leveling, excellent physical properties, good electrical insulation, chemical corrosion resistance, and excellent long-term anticorrosion performance. It is used in steel buried pipelines, concrete It is widely used in anti-corrosion fields such as steel bars, bridge steel bars and cables. [0003] Conventional epoxy powder coatings are composed of solid epoxy resin, phenolic hydroxyl curing agent, pigments and fillers, and additives. They need to be cured at a high temperature of 180°C to 230°C to form a film completely, show...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/04C09D163/00C09D5/08C09D5/03C09D7/61
CPCC09D163/04C09D5/08C09D5/033C08K2003/2241C08L63/00C08K3/22C08K3/042
Inventor 金跃善何惠杰金跃泉许化瑞邱红
Owner 浙江双金粉末涂料有限公司
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