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Mouth-repairing modified polyurea coating in petroleum pipeline

An oil pipeline and modification technology, which is applied in the field of modified polyurea coatings for filling in oil pipelines, can solve problems such as corrosion and poor filling, and achieve the effect of long service life.

Inactive Publication Date: 2019-02-12
大连美宸特环保节能产品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Internal jointing is a recognized technical problem, and poor jointing can easily cause corrosion

Method used

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Embodiment Construction

[0025] The present invention will be further explained below in conjunction with specific examples.

[0026] A modified polyurea coating for internal joints of oil pipelines, the modified polyurea coating includes component A and component B;

[0027] Wherein, component A is (in terms of mass fraction):

[0028] Carbodiimide modified MDI 25-35

[0029] Modified polymer 20-30

[0030] Hydroxy polyether 40-50

[0031] Functional additives 5-10;

[0032] Wherein, component B is (in terms of mass fraction):

[0033] D-2000 25-35

[0034] T-5000 10-20

[0035] D-230 2-8

[0036] DETDA 10-20

[0037] DMTDA 10-20

[0038] Functional fillers 1-5.

[0039] D-2000: amino-terminated polyether with relative molecular mass around 2 000; T-5000: amino-terminated polyether with relative molecular mass around 5000; D-230: amino-terminated polyether with relative molecular mass around 230. It is a product of HUNTSMAN Company in the United States.

[0040] The functional auxiliary a...

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PUM

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Abstract

The invention provides a mouth-repairing modified polyurea coating in a petroleum pipeline which realizes mouth-repairing construction at the low temperature, and fills up the domestic blanks. The mouth-repairing modified polyurea coating in the petroleum pipeline is characterized in that the modified polyurea coating is prepared from a component A and a component B, wherein the component A is prepared from the following ingredients in parts by mass: 25-35 parts of carbodiimide modified MDI, 20-30 parts of modified polymer, 40-50 parts of hydroxy polyether and 5-10 parts of a functional assistant, and the component B is prepared from 25-35 parts of D-2000, 10-20 parts of T-5000, 2-8 parts of D-230, 10-20 parts of DETDA, 10-20 parts of DMTDA and 1-5 parts of functional filler. The mouth-repairing modified polyurea coating in the petroleum pipeline is long in service life, environmentally friendly and free of pollution, and can adapt to outdoor low temperature environments, in particularto mouth-repairing construction at the low temperature (-20 DEG C).

Description

technical field [0001] The invention relates to the technical field of liquid rubber spraying, in particular to a modified polyurea coating for internal filling of oil pipelines. Background technique [0002] Pipeline jointing technology is directly related to the quality and life of the entire pipeline anti-corrosion project. At present, the quality and level of long-distance pipeline anti-corrosion coatings are difficult to guarantee. Corrosion and perforation accidents of pipelines mostly occur in jointing, repairing and bending parts. In the field of pipeline anti-corrosion, the weak link is the construction of on-site pipeline anti-corrosion joints. The on-site joints cannot be equivalent to the pipe body, and the integrity of the pipeline is difficult to achieve. Internal anticorrosion of steel pipes: long-distance pipelines are treated with desulfurization and dehydration, so the inner wall is less corrosive. Due to high water content and strong corrosive medium, the...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D7/63C09D7/61C09D7/42
CPCC09D175/02C08K2003/2224C08K2003/2227C08L2205/025C09D7/42C09D7/61C09D7/63C08L75/02C08K13/02C08K5/12C08K3/22C08K3/2279
Inventor 马庆海
Owner 大连美宸特环保节能产品有限公司
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