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Repairing coating

A coating and sealing technology, which is applied in the field of sealing coatings, can solve problems such as poor sealing quality, and achieve the effects of preventing wet film from sagging, reducing viscosity, and increasing hiding power

Inactive Publication Date: 2012-11-14
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of joint coating, which can be applied to the pipeline joint to form a double-layer liquid anti-corrosion coating, so as to solve the problem of low quality of joint joints in the existing commonly used joint methods. So as to improve the quality of the external anti-corrosion coating of the pipeline and the service life of the entire pipeline

Method used

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  • Repairing coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of sealing paint, wherein the base material comprises the following components according to weight percentage:

[0033] Liquid bisphenol A epoxy resin (type 127 / 128) 280

[0034] Liquid bisphenol F epoxy resin (model EF170) 75

[0035] Xylene 45

[0036] Polyimide (epoxy toughener) 110

[0037] Mica powder 100

[0038] Kaolin 200

[0039] Quartz powder 140

[0040] Fumed silica (thixotropic agent) 20

[0041] Titanium dioxide 30

[0042] Carbon black 0.8

[0043] Triethylenetetramine (curing agent)

[0044] The ratio of base material to curing agent is: base material: curing agent = 100:23.

[0045] Base preparation:

[0046] After weighing each component of the base material according to the formula, add it to the grinder for grinding until the fineness of the coating is less than 80um.

[0047] The main performance index of the patch coating coating of this embodiment 1 is shown in the following table 1:

[0048]

[0049] In addition, through ...

Embodiment 2

[0051] The base material of the filling paint comprises the following components according to weight percentage:

[0052] Liquid bisphenol A epoxy resin (type 127 / 128) 290

[0053] Liquid bisphenol F epoxy resin (model EF170) 80

[0054] Toluene 50

[0055] Nitrile rubber (epoxy toughener) 100

[0056] Mica powder 110

[0057] Kaolin 180

[0058] Quartz Powder 125

[0059] Organic bentonite (thixotropic agent) 30

[0060] Titanium dioxide 35

[0061] Carbon black 0.7

[0062] Diethylenetriamine (curing agent)

[0063] The ratio of base material to curing agent is: base material: curing agent = 100:23.

[0064] The preparation method of base material is with embodiment 1.

[0065] The sealing coating performance test result of embodiment 2 is shown in Table 2:

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Abstract

The invention relates to a repairing coating, solving the problem that an ordinary repairing method is low in on-site repairing quality. The repairing coating comprises base stock and a curing agent, wherein the base stock mainly comprises the following ingredients: liquid state bisphenol A, F epoxy resin, thixotropic agent, toughening agent, filler, pigment and the like; a liquid state amine type curing agent is used as the curing agent, and the use proportioning of the base stock and the curing agent is 100:23. The repairing coating is used for repairing pipes; the combination strength of a combination plane of the repairing material and a 3PE (Poly Ethylene) erosion resistant layer of a pipeline main body can meet the requirements on repairing standard of a 3PE pipeline; and moreover, the on-site engineering process is simple, the mechanization can be realized, the influence of artificial and environment factors on the engineering is reduced, and the repairing coating can be brushed and coated at low temperature of -5 DEG C.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a joint coating that is suitable for use in low-temperature environments during pipeline construction operations. Background technique [0002] Pipeline corrosion is one of the main causes of pipeline safety accidents, and most of the corrosion and perforation accidents of pipelines occur at the joints, so the joints of the outer coating of the pipeline are related to the quality of the anti-corrosion layer of the entire pipeline, and the joints become the whole The weakest link in the pipeline anticorrosion system. [0003] At present, the commonly used sealing methods are: heat shrinkable sleeve (tape), cold-wrapped polyethylene tape, electric heating shrinkable composite sealing, etc. These sealing methods are affected by some environmental and human factors to varying degrees, and there are In harsh environments, the construction process is easily disturbed by environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D5/08
Inventor 陈守平顾玉佳魏强邦王国境孙卫松吴迪
Owner BC P INC CHINA NAT PETROLEUM CORP
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