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Healant for chemical pipes and preparation method thereof

A technology for chemical pipelines and repairing agents, applied in chemical instruments and methods, pipe components, adhesives, etc., can solve the problems of difficult processing, easy recurrence, short plugging time, etc., to improve chemical resistance, strengthen performance indicators, and appearance. beautiful effect

Active Publication Date: 2012-01-11
上海海鹰粘接科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be found from the relevant literature that the repair of pipelines is mainly plugging and repairing. The problem is that the operation is limited, especially for the leaks on the pipe wall. Corrosion is more serious when it grows; the steel skin is covered, which increases the load bearing of the pipeline, and it is difficult to process, and the appearance of the pipeline is not beautiful after the above operations

Method used

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  • Healant for chemical pipes and preparation method thereof
  • Healant for chemical pipes and preparation method thereof

Examples

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Effect test

Embodiment 1

[0048] A special repairing agent for chemical pipelines and a preparation method thereof, the method comprising the following process steps:

[0049] Basic formula composition: 50kg modified epoxy resin, 1.5kg amino-terminated polyol ester modifier, 3kg fumed silica, 20kg nano-silica, 1.5kg antioxidant 1010, 0.05kg graphite, 1kg silver aluminum powder .

[0050] (1) Preparation of modified epoxy resin:

[0051] a. Weigh 85kg of E-51 epoxy resin, 15kg of CTBN, and 0.25kg of transesterification catalyst stannous octoate in a three-necked flask, insert a thermometer into one mouth, heat and stir, control the temperature at 100°C, and react for 4.5h. Subsequently with excessive deionized water precipitation washing product, obtain the prepolymer M1 of CTBN modified epoxy resin after vacuum drying, its reaction is as follows:

[0052]

[0053] b. To synthesize polyurethane prepolymer, mix 95kg of TDI and 5kg of N-330 polyether polyol into a three-neck bottle, and pass in nitro...

Embodiment 2

[0060] A special repairing agent for chemical pipelines and a preparation method thereof, the method comprising the following process steps:

[0061] Basic formula composition: 60kg modified epoxy resin, 1.5kg coupling agent KH-560, 1kg thixotropic agent fumed silica, 30kg nano-silica, 1.5kg antioxidant B315 and 0.5kg ultraviolet absorber UV-9 As anti-aging agent, 3kg silver aluminum powder.

[0062] (1) Preparation of modified epoxy resin:

[0063] a. Weigh 80kg of E-51 epoxy resin, 20kg of CTBN, and 0.25kg of transesterification catalyst organotin in a three-necked flask according to the proportion, insert a thermometer in one mouth, heat and stir, control the temperature at 100°C, react for 5h, and then use Excessive deionized water precipitates and washes the product, and obtains the prepolymer M1 of CTBN modified epoxy resin after vacuum drying;

[0064] b. Synthesis of polyurethane prepolymer: mix 95kg of TDI and 5kg of N-330 polyether polyol into a three-necked bottle...

Embodiment 3

[0070] A preparation method for a chemical pipeline repair agent, characterized in that the method comprises the following steps:

[0071] (1) Prepare modified epoxy resin:

[0072] a. Mix 80kg of commercially available E-51 epoxy resin, 20kg of hydroxyl-terminated nitrile rubber (CTBN), and 0.2kg of transesterification catalyst quaternary ammonium salt, control the reaction temperature at 90-100°C, stir for 5 hours, and then use The precipitated product was washed with ionic water and vacuum-dried to obtain CTBN-modified epoxy resin prepolymer M1;

[0073] b. Mix 95kg of toluene diisocyanate (TDI) with 5kg of ethylenediamine-based polyether polyol, under the protection of nitrogen, control the reaction temperature to 80°C, and stir for 4 hours to obtain a clear and transparent polyurethane oligomer M2;

[0074] c. Mix 95kg of epoxy resin prepolymer M1 with 5kg of polyurethane oligomer M2, control the reaction temperature to 90°C, and stir for 4 hours to obtain grafted modifi...

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Abstract

The invention relates to a healant for chemical pipes and a preparation method thereof. The healant comprises the components in parts by weight as follows: modified epoxy resin 40-60, a coupling agent 1-8, a thixotropic agent 1-5, nano chemical resistant powder 10-40, an anti-aging agent 0.5-10 and pigment cream 0-5. The preparation method comprises the steps of: adding the modified epoxy resin obtained through synthesizing into a reaction kettle; adding the coupling agent; heating and gradually adding the nano chemical resistant powder; keeping the temperature in vacuum and dispersedly mixing at a high speed for 2-4 h; re-adding the anti-aging agent, the pigment cream and the thixotropic agent; and continuously sealing the reaction kettle and dispersedly mixing at a high speed in vacuum for 1-2 h to obtain the product. Compared with the prior art, the healant for chemical pipes is added with adhesive capacity of adhesives and greatly improved in tensile strength and impact resistance, can be applied to more chemical mediums, specifically aims at the repairing of the chemical pipes, and is attractive in appearance.

Description

technical field [0001] The invention relates to a repairing agent and a preparation method, in particular to a repairing agent for chemical pipelines and a preparation method. Background technique [0002] In metallurgy and chemical production, pipelines play the role of transporting fluid and gas medium. Due to the corrosion of the medium or the atmosphere, chemical pipelines often leak, which causes material leakage and brings unsafe factors to production. The discharge of some harmful media also causes environmental pollution. Temporary plugging and repairing can only solve individual problems. For severely aging pipelines, the frequent leakage problem is no longer a problem that can be solved by plugging. If all the pipelines are replaced, the impact on production will be immeasurable. [0003] The special repair agent for chemical pipelines is a kind of coating on the surface of chemical pipelines. As a layer of organic composite material, it can not only be tightly bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J163/00C09J11/04C08G59/14C08G81/00C08G81/02C09K3/12F16L55/16
Inventor 李厚堂张俊灏樊利东刘俊
Owner 上海海鹰粘接科技有限公司
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