Anti-corrosion temperature-resistant adhesive for desulfurization chimney and preparation method of same

An adhesive and temperature-resistant technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve problems such as poor construction performance, low elongation at break, general high temperature resistance, etc., to achieve Increased chemical resistance and hydrophobicity, improved tensile strength and elongation at break, good corrosion resistance and high temperature resistance

Inactive Publication Date: 2020-11-10
四川矽立泰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent CN200910164383.5 discloses a kind of acid gas corrosion resistant high temperature room temperature vulcanized silicone rubber and its manufacturing method. The invention provides a kind of acid gas corrosion resistant silicone rubber. 2 Gas has good anti-corrosion performance, but it cannot meet the anti-corrosion performance requirements of 40% sulfuric acid solution for 6.5 adhesives type I in the national standard GB / T37187-2018, and the elongation at break is low, and it cannot be completely It meets the national standard and cannot be well used in wet desulfurization chimney anticorrosion
Patent CN201510848071.1 discloses a method for preparing an anti-corrosion silicone adhesive for the lining of desulfurization chimneys in thermal power plants. Larger, not environmentally friendly, and its strength is low about 1.5MPa
Patent CN201310362114.6 discloses a silicone adhesive used for anti-corrosion of the inner wall of desulfurization chimney. It has good acid resistance, but the curing time is long, the construction performance is not good, and the high temperature resistance is average.
Patent CN201911023929.5 discloses a temperature-resistant and acid-resistant fluorosilicone rubber elastomer material and its preparation method and application. The use of granular fluorosilicone resin has poor compatibility with the whole, resulting in poor mechanical properties. Meet the heat resistance performance requirements of 6.5 adhesive type I silicone adhesive in the national standard GB / T37187-2018

Method used

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  • Anti-corrosion temperature-resistant adhesive for desulfurization chimney and preparation method of same
  • Anti-corrosion temperature-resistant adhesive for desulfurization chimney and preparation method of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Step a: 100 parts of α,ω-dihydroxy polydimethylsiloxane with a viscosity of 80000mPa.s / 25°C, 10 parts of fluorosilicone oil with a viscosity of 10000mPa.s / 25°C, and a viscosity of 1000mPa.s / 25°C Add 5 parts of polydimethylsilicone oil at ℃, 100 parts of mica powder, 30 parts of titanium dioxide, and 5 parts of fumed white carbon black into a vacuum high-speed disperser and mix evenly to obtain component A;

[0052] Step b: 100 parts of polydimethylsiloxane with a viscosity of 1000mPa.s / 25°C, 50 parts of α,ω-dihydroxypolydimethylsiloxane with a viscosity of 5000mPa.s / 25°C, propylene orthosilicate Add 100 parts of ester, 10 parts of aminoethylaminopropyltriethoxysilane, 40 parts of carbon black, and 0.1 part of dibutyltin dilaurate into a vacuum high-speed disperser and stir for 60 minutes to obtain component B.

[0053] Mix A and B components uniformly in a vacuum defoamer according to the mass ratio A:B=13:1 to obtain an anti-corrosion and temperature-resistant adhesive...

Embodiment 2

[0055] Step a: 100 parts of α,ω-dihydroxypolydimethylsiloxane with a viscosity of 10000mPa.s / 25°C, 30 parts of hydroxyfluorosilicone oil with a viscosity of 10000mPa.s / 25°C, and a viscosity of 100mPa.s / Add 20 parts of polydimethylsiloxane oil, 50 parts of mica powder, 100 parts of talc powder, 60 parts of kaolin, 4 parts of fumed silica, and 12 parts of organic montmorillonite at 25°C into a vacuum high-speed disperser and mix evenly to prepare A components;

[0056] Step b: 100 parts of polydimethylsiloxane with a viscosity of 100mPa.s / 25°C, 100 parts of α,ω-dihydroxypolydimethylsiloxane with a viscosity of 1000mPa.s / 25°C, ethyl orthosilicate Add 200 parts of ester, 30 parts of glycidoxypropyltrimethoxysilane, 80 parts of carbon black, and 0.5 part of dibutyltin dioctoate into a vacuum high-speed disperser and stir for 30 minutes to obtain component B.

[0057] Mix A and B components uniformly in a vacuum defoamer according to the mass ratio A:B=18:1 to obtain an anti-corro...

Embodiment 3

[0059] Step a: 100 parts of α,ω-dihydroxypolydimethylsiloxane with a viscosity of 40000mPa.s / 25°C, 20 parts of hydroxyfluorosilicone oil with a viscosity of 5000mPa.s / 25°C, and a viscosity of 500mPa.s / Add 12 parts of polydimethylsiloxane oil, 80 parts of mica powder, 20 parts of fluorite powder, 20 parts of titanium dioxide, 40 parts of silicon micropowder, 4 parts of fumed white carbon black, and 12 parts of active nano-calcium carbonate at 25°C into the vacuum high-speed disperser Mix uniformly in medium to obtain component A;

[0060] Step b: 100 parts of polydimethylsiloxane with a viscosity of 500mPa.s / 25°C, 70 parts of α,ω-dihydroxypolydimethylsiloxane with a viscosity of 500mPa.s / 25°C, methyl triethyl Add 150 parts of oxysilane, 20 parts of aminoethylaminopropyltrimethoxysilane, 60 parts of carbon black, and 0.3 part of dibutyl tin dioctoate into a vacuum high-speed disperser and stir for 30 minutes to obtain component B.

[0061] Mix A and B components uniformly in a...

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Abstract

The invention discloses an anticorrosive temperature-resistant adhesive for a desulfurization chimney. The anticorrosive temperature-resistant adhesive is composed of a component A and a component B in a mass ratio of (13-18):1, wherein the component A is prepared from the following components in parts by weight: 100 parts of hydroxyl-terminated polydimethylsiloxane, 10 to 30 parts of fluorosilicone oil, 5 to 20 parts of polydimethylsilicone oil, 80 to 150 parts of acid-resistant filler, 30 to 60 parts of high-temperature-resistant filler and 5 to 16 parts of thixotropic agent; and the component B comprises the following components in parts by weight: 100 parts of polydimethylsiloxane, 50-100 parts of hydroxyl-terminated polydimethylsiloxane, 100-200 parts of a cross-linking curing agent,10-30 parts of a silane coupling agent, 40-80 parts of carbon black and 0.1-0.5 part of a catalyst. The anti-corrosion temperature-resistant adhesive for the desulfurization chimney has excellent anti-corrosion performance and high-temperature resistance, is short in complete curing time and short in curing period, and can improve the equipment utilization rate.

Description

technical field [0001] The invention relates to an anti-corrosion and temperature-resistant adhesive for desulfurization chimneys and a manufacturing method thereof, belonging to the technical field of desulfurization chimney anti-corrosion. Background technique [0002] The "Emission Standards of Air Pollutants for Thermal Power Plants" (GB 13223-2011), which came into effect on January 1, 2012, has made stricter regulations on emission standards. At present, domestic thermal power plants generally adopt wet desulfurization. This process has the characteristics of high desulfurization efficiency, large flue gas treatment capacity, wide application of coal quality, mature process technology, long stable operation period, and small impact of load changes. However, the corrosion environment of the chimney (flue) has changed a lot, and the corrosive medium formed during the discharge of wet flue gas has formed a strong corrosion on the chimney (flue). Bring hidden danger to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J183/08C09J11/04C09J11/06
CPCC08K2003/2241C08L2201/08C08L2205/02C08L2205/025C08L2205/035C09J11/04C09J11/06C09J183/04C08L83/04C08L83/08C08K3/34C08K3/22C08K7/26C08K5/544C08K5/5435C08K13/04
Inventor 彭玉洪尹东旭王杰
Owner 四川矽立泰新材料有限公司
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