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Polyaspartic acid ester sealant for petroleum pipeline end socket and preparation method thereof

A kind of aspartate, oil pipeline technology

Inactive Publication Date: 2014-05-14
大连怿文新材料科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to propose a polyaspartic acid ester for petroleum pipeline head, aiming at the problems of poor adhesion of the current polyurethane sealant; poor liquid medium resistance and oil resistance; poor weather resistance and poor aging resistance Type sealant, in oil resistance, liquid medium resistance, weather resistance and aging resistance, at the same time, the mechanical properties of pipeline anti-corrosion polyurea tend to be consistent, and the adhesion is excellent

Method used

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  • Polyaspartic acid ester sealant for petroleum pipeline end socket and preparation method thereof
  • Polyaspartic acid ester sealant for petroleum pipeline end socket and preparation method thereof
  • Polyaspartic acid ester sealant for petroleum pipeline end socket and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The present embodiment discloses a polyaspartate-type sealant for oil pipeline heads, which includes the following components by weight:

[0043] A component:

[0044] 65.7 parts of hexamethylene diisocyanate trimer HDI;

[0045] 34.3 parts of polytetrahydrofuran ether polyol PTMG-1000;

[0046] Component B:

[0047]

[0048] The sealant is prepared by the following steps:

[0049] Preparation of component A: add 34.3g of polytetrahydrofuran ether polyol PTMG-1000 into the container, stir the liquid material at low speed for 5 minutes, heat it to 110~120℃, turn on the vacuum pump, the vacuum degree is -0.1~-0.08 MPa, vacuum dehydration for 2h, remove a small amount of water contained in the raw material, check that the moisture content is below 3 / 10,000, and cool to a liquid temperature of about 25 °C. 65.7g of hexamethylene diisocyanate HDI trimer was added to the container, and the reaction was stirred at room temperature for 1 hour. After the exotherm of the r...

Embodiment 2

[0058] The present embodiment discloses a polyaspartate-type sealant for oil pipeline heads, which includes the following components by weight:

[0059] A component:

[0060] 50.4 parts of 4,4'-dicyclohexylmethane diisocyanate HMDI;

[0061] Polyoxypropylene ether polyol PPG-1000 49.6 copies;

[0062] Component B:

[0063]

[0064] The sealant is prepared by the following steps:

[0065] Preparation of component A: add 49.6g of polyoxypropylene ether polyol PPG-1000 into the container, stir the liquid material at low speed for 5 minutes, heat it to 110~120℃, turn on the vacuum pump, the vacuum degree is -0.1~- 0.08MPa, vacuum dehydration for 2h, remove a small amount of water contained in the raw material, check that the moisture content is below 3 / 10,000, and cool to a liquid temperature of about 25 °C. 50.4g of 4,4'-dicyclohexylmethane diisocyanate HMDI was added to the container, and the reaction was stirred at room temperature for 1 hour. After the exotherm of the r...

Embodiment 3

[0073] The present embodiment discloses a polyaspartate-type sealant for oil pipeline heads, which includes the following components by weight:

[0074] A component:

[0075] 69.3 parts of hexamethylene diisocyanate HDI trimer;

[0076] Polyoxypropylene ether polyol PPG-1000 30.7 parts;

[0077] Component B:

[0078]

[0079] The sealant is prepared by the following steps:

[0080] Preparation of component A: add 30.7g of polyoxypropylene ether polyol PPG-1000 into the container, stir the liquid material at low speed for 5 minutes, heat it to 110~120℃, turn on the vacuum pump, the vacuum degree is -0.1~- 0.08MPa, vacuum dehydration for 2h, remove a small amount of water contained in the raw material, check that the moisture content is below 3 / 10,000, and cool to a liquid temperature of about 25 °C. 69.3g of hexamethylene diisocyanate HDI trimer was added to the container, and the reaction was stirred at room temperature for 1 hour. After the exotherm of the reaction was...

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Abstract

The invention provides a polyaspartic acid ester sealant for a petroleum pipeline end socket and a preparation method of the polyaspartic acid ester sealant. The polyaspartic acid ester sealant for the petroleum pipeline end socket comprises, by weight ratio, including a constituent A and a constituent B, wherein the constituent A includes 20-70 parts of aliphatic isocyanate and 20-65 parts of polyether polyol; the constituent B includes 30-70 parts of asparaginic acid resin, 30-44 parts of a steric hindrance chain extender, 5-50 parts of padding, 2-4 parts of an addition agent, 1-3 parts of a pigment and 4-10 parts of a plasticizing agent; the mass ratio of the constituent A to the constituent B is 1:1-1.3:1. The polyaspartic acid ester sealant for the petroleum pipeline end socket has the advantages that the formula is scientific and reasonable; the oil resistance, the liquid medium resistance, the weather resistance and the ageing resistance of the polyaspartic acid ester sealant are excellent; the mechanical property of the polyaspartic acid ester sealant is approximately the same as that of anti-corrosion polyurea of a pipeline, so that the adhesive force of the polyaspartic acid ester sealant is excellent.

Description

technical field [0001] The invention relates to polyurea technology, in particular to a polyaspartic acid ester type sealant for petroleum pipeline heads and a preparation method thereof. Background technique [0002] With the development of the national economy, the advantages of pipeline oil transportation have become increasingly prominent. The laying of oil pipelines generally adopts two methods: overhead or buried. But no matter which way is used, when the metal pipe is in contact with the surrounding medium, its surface will be rusted due to chemical or electrochemical action. This phenomenon is very common. After the metal pipeline is corroded, its shape, color and mechanical properties will change, which will affect the quality of the oil transported, shorten the service life of the oil pipeline, and may seriously cause leakage, pollute the environment, or even become unusable. [0003] The common corrosion of oil pipeline includes chemical corrosion and electroch...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J175/02C08G18/73C08G18/48
Inventor 姜鹏波史立彤李同信车栋季春波
Owner 大连怿文新材料科技发展有限公司
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