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Hydrogen sulfide corrosion-resistant water-swellable rubber and preparation method thereof

A water-swellable rubber and hydrogen sulfide-resistant technology, which is applied in the treatment of dyed low-molecular organic compounds and fibrous fillers, can solve the problems of unsuitable water-swellable rubber, expensive rubber, and affecting sealing performance, and achieve excellent durability. Hydrogen sulfide corrosion ability, improvement of hydrogen sulfide corrosion resistance, and effect of prolonging service life

Inactive Publication Date: 2010-04-28
WUHAN METRO GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the existing rubbers, perfluoroether rubber, fluorinated phosphazene rubber, tetrapropylene fluorine rubber and hydrogenated nitrile rubber have excellent corrosion resistance to hydrogen sulfide, but these rubbers are expensive and are not suitable for the production of water-swellable rubber.
At present, water-swellable rubber is made by blending water-soluble polyurethane prepolymer, cross-linked sodium polyacrylate and other water-absorbing materials with natural rubber, neoprene and other rubbers. These rubbers and water-absorbing materials are resistant to hydrogen sulfide corrosion. All are poor, resulting in a large decline in the performance of water-swellable rubber in a relatively short period of time, which greatly affects its sealing performance, and may cause water leakage and water seepage in the building structure, resulting in sealing failure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A water-swellable rubber resistant to hydrogen sulfide corrosion and a preparation method thereof, comprising the steps of:

[0023] Preparation of organic montmorillonite: Add 10g of sodium montmorillonite and 200g of distilled water into a three-necked flask, raise the temperature to 80°C, stir for 1 hour to form a suspension, then add 3g of ethylene bis(octadecyldihydroxyethyl ammonium chloride), stirred at 80°C for 6h, cooled naturally to room temperature, filtered the suspension, then suction filtered and washed the precipitate, and finally dried the filter cake in an oven at 110°C for 8h, and ground Pass through a 300-mesh sieve to obtain organic montmorillonite.

[0024] Mix 100 parts (parts by mass, the same below) of natural rubber, 25 parts of cross-linked sodium polyacrylate and 5 parts of organic montmorillonite in a banbury mixer at a temperature of 110°C for 6 minutes, and then sequentially add 30 parts of red iron oxide, 4 parts of zinc oxide, 3 parts of...

Embodiment 2

[0028] A water-swellable rubber resistant to hydrogen sulfide corrosion and a preparation method thereof, comprising the steps of:

[0029] The preparation of organic montmorillonite is the same as in Example 1.

[0030] 100 parts of natural rubber, 40 parts of cross-linked sodium polyacrylate and 10 parts of organic montmorillonite prepared by the same method as in Example 1 were banburyed in a banbury mixer at a temperature of 115°C for 5 minutes, and then successively Add 25 parts of iron oxide red, 6 parts of zinc oxide, 4 parts of stearic acid, 2.5 parts of sulfur, 1.5 parts of accelerator tetramethylthiuram disulfide, 1.2 parts of anti-aging agent N-phenyl-β-naphthylamine, and keep The banburying temperature is 115°C, continue banburying in the internal mixer for 6 minutes, and roll it into 2mm flakes through a double-roller open mill after discharge. After 24 hours at room temperature, put it into a mold and vulcanize it in a flat vulcanizer. Molding, vulcanization tem...

Embodiment 3

[0034] A water-swellable rubber resistant to hydrogen sulfide corrosion and a preparation method thereof, comprising the steps of:

[0035] The preparation of organic montmorillonite is the same as in Example 1.

[0036] 100 parts of natural rubber, 56 parts of cross-linked sodium polyacrylate and 15 parts of organic montmorillonite prepared by the same method as in Example 1 were banburyed in a banbury mixer at a temperature of 100°C for 8 minutes, and then successively Add 28 parts of clay, 8 parts of zinc oxide, 3 parts of dioctyl ester, 2.5 parts of sulfur, 1.2 parts of accelerator tetramethylthiuram disulfide, 1.0 parts of anti-aging agent N-phenyl-β-naphthylamine, and keep banburying The temperature is 100°C, continue to banbury in the internal mixer for 10 minutes, after discharging, it is rolled into a 2mm sheet by a double-roller open mill, and after being parked at room temperature for 24 hours, it is put into a mold and vulcanized in a rubber flat vulcanizing machin...

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Abstract

The invention relates to a hydrogen sulfide corrosion-resistant water-swellable rubber and a preparation method thereof. The hydrogen sulfide corrosion-resistant water-swellable rubber is characterized in that the hydrogen sulfide corrosion-resistant water-swellable rubber consists of the following components by parts by weight: 100 parts of natural rubber, 20-60 parts of crosslinked sodium polyacrylate, 2-15 parts of organic montmorillonite, 3-8 parts of zinc oxide, 20-35 parts of filling agent, 2-5 parts of softener, 1-3 parts of vulcanizing agent, 0.5-2 parts of vulcanization accelerator and 0.5-1.5 parts of anti-aging agent. The prepared hydrogen sulfide corrosion-resistant water-swellable rubber has excellent hydrogen sulfide corrosion-resistant capacity.

Description

technical field [0001] The invention relates to a water-swellable rubber resistant to hydrogen sulfide corrosion and a preparation method thereof. Background technique [0002] Water-swellable rubber is a waterproof sealing material that can quickly absorb water and retain water while maintaining high rubber elasticity. It is widely used in deformation joints, construction joints, settlement joints and shields in tunnels, culverts, subways and other underground projects. Watertight sealing of structural segments. Water-swellable rubber is mainly composed of natural or synthetic rubber, water-absorbing resin, filler, softener, accelerator and anti-aging agent, etc., and has good aging resistance and corrosion resistance. However, in recent years, harmful gases such as gas have been found in some underground engineering constructions. The main component of gas is methane, and contains a small amount of ethane, propane, and hydrogen sulfide, ammonia, carbon dioxide and carbon...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L33/02C08K13/06C09C1/28C09C3/08B29B7/28B29B7/56B29C35/02
Inventor 周少东余剑英傅志峰杨盛华徐建平冯振刚林文书吴少鹏周华杰张恒龙王红喜况栋梁熊朝辉王金龙
Owner WUHAN METRO GROUP
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