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Tough sintering epoxy powder coating and preparation thereof

A technology for sintering epoxy powders and coatings, applied in powder coatings, epoxy resin coatings, anti-corrosion coatings, etc., can solve the problems of low cross-linking, insignificant toughening effect, poor leveling, etc., to meet anti-corrosion requirements , High impact resistance, the effect of increasing toughness

Inactive Publication Date: 2009-01-28
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing FBE coating production generally adopts bisphenol A epoxy resin or epoxy dicyandiamide powder coating which is solid at room temperature, which has the disadvantages of low cross-linking degree and poor leveling, and there are also differences in hardness after film formation and curing. The contradiction between impact resistance and flexibility, so although some work has been done on the toughening of fusion bonded epoxy powder coatings, it is usually at the expense of material strength, modulus and heat resistance, making its physical and mechanical properties and thermal performance are greatly affected by the
Even if the above problems are taken into account, the toughening effect is not obvious

Method used

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  • Tough sintering epoxy powder coating and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A solution of 12.5 g of silane composition A and 2 g of solvent B was added to 100 g of titanium dioxide, mixed in a high-speed mixer for 30 minutes, and air-dried to obtain treated titanium dioxide powder.

Embodiment 2

[0025] Add 30kg of novolac epoxy resin, epoxy resin E-1220g, 15kg of curing agent, and 2kg of leveling agent into a high-speed mixer and mix for 2 minutes, add 33kg of silane-treated titanium dioxide powder, and mix for 5 minutes at high speed; premixed materials are added to extrude Machine melt extrusion, the feeding section temperature is 90°C, the melting section temperature is 100°C, the mixing section is 110°C, the discharge section is 100°C, the extruder speed is controlled at 80rpm, and the tablet is compressed and cooled on the air-cooled crawler tablet crusher. , crushing, in the crushing mill, the product is obtained by crushing, grading, cyclone separator separation and sieving, and the superfine powder is removed by cyclone separation. The product particle size control: 150 μm sieve powder ≤ 3%, 250 μm sieve powder ≤ 0.2%.

[0026] Toughened epoxy powder coating technical index that the present invention makes

[0027] indicators

Test results

T...

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Abstract

The invention relates to a tough fusion bonded epoxy powder coating and a preparation method thereof. The tough fusion bonded epoxy powder coating of the invention consists of the following components by mass percentage: linear phenolic epoxy resin, 30 percent to 50 percent; epoxy resin E-12, 0 percent to 20 percent; curing agent, 15 percent to 25 percent; leveling agent, 0 to 2 percent; and filling, 23 percent to 33 percent. The preparation method of the tough fusion bonded epoxy powder coating comprises the following steps: adding the components into a high-speed mixer for mixing according to mixture ratio and later into an extruder for melt extrusion, and then undertaking chip compression, cooling and crushing on a cold crawler type chip compression crusher, and later undertaking grinding, classification, cyclone separation and screening in a grinding machine, and finally obtaining the product. The tough fusion bonded epoxy powder coating of the invention is mainly used in the pipe anti-corrosion field, has the advantages of good toughness, high impact resistance performance, and simple preparation process, and is suitable for mass production.

Description

technical field [0001] The invention relates to the field of tough fusion-bonded epoxy powder coatings for pipeline anticorrosion, in particular to tough fusion-bonded epoxy powder coatings and a preparation method thereof. technical background [0002] Fusion-bonded epoxy powder coating (FBE) is mainly used for pipeline anti-corrosion. It is a new type of anti-corrosion coating that does not contain solvents and is formed by melting powder. During the coating process of pipelines, there is no VOC pollution, fast curing speed, and long service life. long. However, the construction conditions of onshore oil and gas pipelines are harsh and the environment is complex. The requirements for the chemical properties, mechanical and physical properties and spraying performance of fusion bonded epoxy powder coatings are relatively high, especially the impact resistance and flexibility of FBE. [0003] The existing FBE coating production generally adopts bisphenol A epoxy resin or ep...

Claims

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Application Information

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IPC IPC(8): C09D163/04C09D5/03C09D5/08F16L58/10B29C47/92B29C48/92
CPCB29C47/92B29C48/9185B29C48/04B29C48/08B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 李文静薛彩琴沈国标
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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