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FBE pnenolic aldehyde modified epoxy powder coating and its preparation method

A phenolic modified epoxy and powder coating technology, applied in powder coatings, epoxy resin coatings, coatings, etc., can solve the problems of low cross-linking degree, the anti-corrosion coating is difficult to meet the requirements of heavy anti-corrosion, and the leveling is poor. Achieve the effect of strong adhesion, good construction technology and excellent chemical resistance.

Inactive Publication Date: 2006-02-15
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the existing FBE epoxy powder coatings often use E-12 epoxy resin-dicyandiamide system, which has the disadvantages of low crosslinking degree and poor leveling, and the formed anti-corrosion coating is difficult to meet the increasing heavy-duty anti-corrosion requirements of buried oil pipelines. Require

Method used

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  • FBE pnenolic aldehyde modified epoxy powder coating and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment demonstrates the preparation method of the FBE phenolic modified epoxy heavy-duty anti-corrosion powder coating of the present invention.

[0031] Add 50.00kg of phenolic modified epoxy resin, 10.00kg of curing agent, and 2.00kg of leveling agent into a high-speed mixer and mix for 2 minutes, add 0.28kg of degasser, 0.02kg of curing accelerator, 0.50kg of medium chrome yellow, and phthalocyanine Blue 0.05kg, titanium dioxide 2.50kg, precipitated barium sulfate 34.65kg, mixed at high speed for 3 minutes, the premixed material was added to the extruder to melt and extrude, the temperature of the feeding section was 88°C, the temperature of the melting section was 100°C, and the mixing section was 110°C. The material section is at 100°C, the speed of the extruder is controlled at 70rpm, and the tablet is pressed, cooled and crushed on the air-cooled crawler-type tablet crusher. The thickness of the tablet is 2mm, and it is broken into flakes of 5-10mm. After...

Embodiment 2

[0033] The formula of FBE phenolic modified epoxy heavy-duty anti-corrosion powder coating is as follows:

[0034] Phenolic modified epoxy resin 37.50kg

[0035] E-12 epoxy resin 12.50kg

[0036] Curing agent 12.50kg

[0037] Leveling agent 1.00kg

[0038] Degasser 0.30kg

[0039] Curing accelerator 0.03kg

[0040] Medium chrome yellow 0.50kg

[0041] Phthalocyanine blue 0.05kg

[0042] Titanium dioxide 2.50kg

[0043] Precipitated barium sulfate 33.12kg

[0044] Product particle size control: 150μm sieve powder ≤ 3%, 250μm sieve powder ≤ 0.2%

Embodiment 3

[0046] The formula of FBE phenolic modified epoxy heavy-duty anti-corrosion powder coating is as follows:

[0047] Phenolic modified epoxy resin 25.00kg

[0048] E-12 epoxy resin 25.00kg

[0049] Curing agent 15.00kg

[0050] Leveling agent 1.70kg

[0051] Degasser 0.20kg

[0052] Curing accelerator 0.05kg

[0053] Medium chrome yellow 0.50kg

[0054] Phthalocyanine blue 0.05kg

[0055] Titanium dioxide 2.50kg

[0056] Precipitated barium sulfate 30.00kg

[0057] Product particle size control: 150μm sieve powder ≤ 3%, 250μm sieve powder ≤ 0.2%

[0058]The technical index that the FBE phenolic modified epoxy heavy-duty anticorrosion powder coating that makes by embodiment can reach:

[0059] a. Properties of anti-corrosion epoxy powder

[0060] Item Quality Index

[0061] Appearance Uniform color, no agglomeration

[0062] Curing time (180°C) / min ≤5

[0063] Curing time (180℃) / s ≤90

[0064] Adhesion / level ≤2

[0065] Non-volatile content (%) ≥99.4

[0066] Part...

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Abstract

The FBE phenolic modified epoxy powder comprises, 25~50% phenolic modified epoxy resin, 0~25% E-12 epoxy resin, 10~15% curing agent, 0.5~2.0% levelling agent, 0.2~0.3% degasifier, 0.02~0.05% curing accelerant, 0.5% chrome yellow, 0.05% phthalocyanine, 2.5% phthalocyanine, and 25~30% deposited barium sulfate. Wherein, mixing rapidly the resins, curing agent, and levelling agent for 1~2min; adding others to mix for 3~5min; fusion extruding the mixed material; tabletting the fused material; cooling to smash in frain mill and classify; separating fine powder by cyclone, and sieving the powder to obtain product.

Description

technical field [0001] The invention relates to a fusion bonded epoxy powder coating for anticorrosion of oil pipelines and a preparation method thereof, in particular to a process method of phenolic modified epoxy powder coating. Background technique [0002] FBE epoxy powder coating is a new type of anti-corrosion coating that does not contain solvent, is sprayed in powder state, and is heated and fused to form a film. There is no pollution in the process of spraying and sintering of pipelines. [0003] The main anti-corrosion method for buried steel pipes is anti-corrosion layer plus cathodic protection. The anti-corrosion layer includes asphalt anti-corrosion layer, tape, jacket, epoxy powder, FBE epoxy powder and three-layer polyethylene (three-layer PE). The anti-corrosion layer materials of foreign long-distance oil (gas) pipelines are mainly FBE epoxy powder and three-layer polyethylene. vinyl. Compared with other anti-corrosion coatings, FBE epoxy powder coating h...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/03
Inventor 杨保平周应萍崔锦峰张应鹏张建强
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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