Organosilicone-nano compound modified polyurea corrosion-resisting coating for mechanical recovery well environment and preparation method for organosilicone-nano compound modified polyurea corrosion-resisting coating

A nano-composite, silicone technology, applied in coatings, anti-corrosion coatings, etc., to achieve excellent surface adsorption and concentration effects, large specific surface area, and rapid curing

Inactive Publication Date: 2012-10-03
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of sucker rod corrosion, the present invention provides an organic silicon-nano-composite modified polyurea coating and its preparation method which are resistant to high temperature, high pressure and ma

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of component A: Weigh 49 parts of 4,4'-diphenylmethane diisocyanate, 31 parts of polyether polyol 220, and 20 parts of aminoethylaminopropyl polydimethylsiloxane; mix 4,4 '-Diphenylmethane diisocyanate was added to the reaction kettle, filled with nitrogen, stirred at a constant speed under a cold water bath at 10°C, and polyether polyol 220 and aminoethylaminopropyl polydimethylsiloxane were added dropwise to the kettle , keep warm while stirring; after the dropwise addition, keep warm at 70-90°C for 3 hours, take a sample to measure the content of free isocyanate groups to be 15.5%, cool and discharge to obtain component A;

[0021] Preparation of component R: weigh 10 parts T-5000, 28 copies D-2000, 30 parts of diethyltoluenediamine, 30 parts of nano powder, 1 part of Irganox1076 and 1 part of Tinuvin328; first mix nano powder, Irganox1076, Tinuvin328 and 5 parts T-5000, 14 copies D-2000, mix and grind until the grinding slurry with a fineness of 4...

Embodiment 2

[0024] Preparation of component A: Weigh 49 parts of 2,4'-diphenylmethane diisocyanate, 31 parts of polyether polyol 220, and 20 parts of aminoethylaminopropyl polydimethylsiloxane; mix 2,4 '-Diphenylmethane diisocyanate was added to the reaction kettle, filled with nitrogen, stirred at a constant speed under a cold water bath at 10°C, and polyether polyol 220 and aminoethylaminopropyl polydimethylsiloxane were added dropwise to the kettle , keep warm while stirring; after the dropwise addition, keep warm at 70-90°C for 3 hours, take a sample to measure the content of free isocyanate groups to be 15.5%, cool and discharge to obtain component A;

[0025] Preparation of component R: weigh 10 parts T-5000, 32 copies D-2000, 26 parts of diethyltoluenediamine, 20 parts of nano powder, 0.5 parts of Irganox1076 and 0.5 parts of Tinuvin328; first mix nano powder, Irganox1076, Tinuvin328 and 5 parts T-5000, 20 copies D-2000, mix and grind until the grinding slurry with a finenes...

Embodiment 3

[0028] Preparation of component A: Weigh 42 parts of MDI-50, 38 parts of polyether polyol 220, and 20 parts of aminoethylaminopropyl polydimethylsiloxane; add MDI-50 into the reaction kettle, fill with nitrogen , Stir at a constant speed in a cold water bath at 10°C, and add polyether polyol 220 and aminoethylaminopropyl polydimethylsiloxane dropwise to the kettle, and keep warm while stirring; After 3 hours of heat preservation, take a sample to measure the content of free isocyanate groups to be 15.5%, cool and discharge to obtain component A;

[0029] Preparation of component R: weigh 10 parts T-5000, 39 copies D-2000, 20 parts of diethyltoluenediamine, 30 parts of nano powder, 0.5 parts of Irganox1076 and 0.5 parts of Tinuvin328; first mix nano powder, Irganox1076, Tinuvin328 and 5 parts T-5000, 25 copies D-2000, mix and grind until the grinding slurry with a fineness of 35um is obtained; put the grinding slurry into the reaction kettle, add diethyltoluenediamine an...

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PUM

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Abstract

The invention discloses an organosilicone-nano compound modified polyurea corrosion-resisting coating for a mechanical recovery well environment. The coating comprises the following components in percentage by volume: 50 percent of component A and 50 percent of component R, wherein the component A is semi-prepolymer which is synthesized by using 30 to 50 parts of polyisocyanates of which functionality degree is 2 to 2.7, 20 to 40 parts of polyol and 10 to 30 parts of organosilane; free isocyanate accounts for 13 to 18 percent of the semi-prepolymer; and the component R comprises the following components in part by weight: 10 to 30 parts of nano powder, 40 to 60 parts of amino-terminated polyether, and 5 to 30 parts of amine chain extender. The invention also discloses a preparation method for the organosilicone-nano compound modified polyurea corrosion-resisting coating for the mechanical recovery well environment. The coating has the advantages that when sprayed on a pretreated sucker rod by the method, the component A and the component R are cured quickly, and are wear-resistant and high temperature-resistant; and by matching of primer, the coating is strong in adhesion and is suitable for the mechanical recovery well environment of which the well depth is less than 2,500m.

Description

technical field [0001] The invention relates to a composite coating, in particular to a novel composite anticorrosion coating which is resistant to high temperature, high pressure and environmental corrosion in mechanical mining wells. Background technique [0002] Corrosion of steel pipes generally exists in various sectors of the national economy and national defense construction, which not only brings huge losses to the national economy, but also causes great difficulties to production and life. According to statistics, the annual output of steel in my country is 160 million tons, and more than 60 million tons are lost due to corrosion every year. Corrosion of steel pipes is not only a waste of steel resources, but also shortens the service life of pipes and equipment, and the cost of replacing new pipes and equipment far exceeds the price of the metal material itself. At the same time, the scale layer formed by corrosion products will reduce the heat transfer efficiency...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D7/12C09D5/08C08G18/66C08G18/61C08G18/32C08G18/38
Inventor 王炳英陈酒姜孙汉军师清豪赵斌
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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