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

A water-swelling and rubber-sealing technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of unsuitable water-swelling rubber, poor resistance to hydrogen sulfide corrosion, and expensive rubber, and achieve excellent water-swelling and sealing performance, improved compatibility, and improved gas-liquid barrier performance

Inactive Publication Date: 2016-11-16
ANHUI RONGDA VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 equally resistant to hydrogen sulfide corrosion. Poor, resulting in a large decline in the performance of water-swellable rubber in a short period of time, greatly affecting its sealing performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weighing: 70 kg of butyl rubber, 30 kg of EPDM rubber, 12 kg of bentonite-calcium carbonate microspheres, 10 kg of SAP resin, 10 kg of organic rectorite, 3 kg of zinc oxide, N-phenyl-β- 3 kg of naphthylamine, 12 kg of organic treatment agent QAS;

[0024] The bentonite-calcium carbonate microspheres are composed of the following raw materials in parts by weight: 50 parts of calcium chloride, 50 parts of sodium carbonate, 6 parts of sodium lauryl sulfate, and 6 parts of polyacrylamide.

[0025] Specific steps are as follows:

[0026] (1) Preparation of bentonite-calcium carbonate microspheres:

[0027] ①. Prepare calcium chloride solution, sodium carbonate solution, sodium dodecyl sulfonate aqueous solution and polyacrylamide aqueous solution, wherein calcium chloride and calcium carbonate solution have the same concentration, and their molar concentration is between 0.2mol / L, ten The molar concentration of dialkyl sodium sulfonate aqueous solution is between 15mmol / L,...

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PUM

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Abstract

The invention discloses a hydrogen sulfide corrosion-resistant water-swellable waterproof rubber sealing material and a preparation method thereof. The sealing material comprises the following raw materials in parts by weight: 60-70 parts of butyl rubber, 30-40 parts of ethylene-propylene-diene monomer, 10-16 parts of bentonite-calcium carbonate microspheres, 10-12 parts of SAP resin, 8-12 parts of organic rectorite, 1-5 parts of zinc oxide, 1-5 parts of N-phenyl-beta-naphthylamine, and 2-3 parts of an organic treatment agent QAS1. The prepared water-swellable waterproof rubber sealing material has the advantages of excellent hydrogen sulfide corrosion resistance.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a water-swellable waterproof rubber sealing material resistant to hydrogen sulfide corrosion and a preparation method thereof. Background technique [0002] Water-swellable rubber (WSR) is a functional water-stop material. Because it has the characteristics of adapting to structural deformation and water expansion, it can play the role of elastic sealing and water sealing, so it is an ideal waterproof sealing for foundation engineering deformation joints, construction joints, water embankment caulking and various pipe joints. water material. [0003] In recent years, methane gas has been discovered during some underground construction processes. The main component of methane gas is methane, and contains hydrogen sulfide, carbon dioxide, carbon monoxide, ammonia and other gases, among which hydrogen sulfide is a highly corrosive gas. Among the existing rubbers, perfluoroether r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/22C08L23/16C08L101/12C08K13/06C08K9/04C08K3/34C08K7/18C08K3/22C08K5/18C09K3/10
CPCC08L23/22C08L2205/02C08L2205/03C09K3/10C08L23/16C08L101/12C08K13/06C08K9/04C08K3/34C08K7/18C08K2003/2296C08K5/18
Inventor 胡光荣
Owner ANHUI RONGDA VALVE
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