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Hydrogen sulfide corrosion resisting rubber waterstop strip and method for producing same

A rubber water-stop, hydrogen sulfide-resistant technology, applied in mining equipment, shaft equipment, earth-moving drilling, etc., can solve the problems of water leakage, water seepage, affecting the sealing water-stop performance, sealing failure, etc., to improve compatibility properties, improve the gas-liquid barrier performance, and increase the effect of layer spacing

Inactive Publication Date: 2012-04-25
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have found that hydrogen sulfide has a strong corrosive effect on EPDM waterstops, and the performance of EPDM waterstops will decline to a large extent in a relatively short period of time, which greatly affects its sealing. Water performance, which may cause water leakage and water seepage in the building structure, resulting in seal failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of a hydrogen sulfide-resistant rubber waterstop, carried out as follows:

[0027] Preparation of star-shaped quaternary ammonium salt intercalation agent: Add 56.4g of oleic acid, 30mL of xylene and 0.3g of boric acid into the reactor, after heating up to 180°C, add 10.6g of diethylene dropwise into the reaction system with a dropping funnel Triamine, the water produced by the reaction was continuously separated through the water separator, stirred for 2 hours, and then the solvent xylene was removed by rotary evaporation, 25mL of absolute ethanol was added to the reactor, heated to 40°C, and the reaction was carried out with a dropping funnel. 34.2g of 3-chloro-2-hydroxypropyltrimethylammonium chloride solution with a concentration of 50wt% was added dropwise to the system, the temperature was raised to 80°C, the reaction was stirred for 4 hours, and finally the absolute ethanol was removed by rotary evaporation to obtain A star-shaped quaternary ...

Embodiment 2

[0033] The preparation of the star-shaped quaternary ammonium salt intercalation agent and the preparation of the organic rectorite are the same as in Example 1.

[0034]100g of EPDM rubber and 10g of organic rectorite prepared by the same method as in Example 1 were banburyed in a banbury mixer, the banburying temperature was 140°C, the banburying time was 6min, and then 60g of carbon black was added in sequence , 1.5g of sulfur, 8g of zinc oxide and 2g of 2-mercaptobenzothiazole, keep the temperature at 140°C, continue banburying in the internal mixer for 7min, and roll it into 2mm flakes through a double-roller open mill after discharge. After being parked for 24 hours, put it into the mold, and vulcanize it in a flat vulcanizer. The vulcanization temperature is 170°C, the vulcanization pressure is 12MPa, and the vulcanization time is 10min. Hydrogen-corroded rubber waterstops. The tensile strength of the prepared rubber waterstop is 11.1 MPa, and the elongation at break i...

Embodiment 3

[0038] The preparation of the star-shaped quaternary ammonium salt intercalation agent and the preparation of the organic rectorite are the same as in Example 1.

[0039] 100g of EPDM rubber and 16g of organic rectorite prepared by the same method as in Example 1 were banburyed in a banbury mixer, the banburying temperature was 150°C, the banburying time was 5min, and then 70g of carbon black was added in sequence , 1.8g of sulfur, 6g of stearic acid and 3g of zinc dimethyl dithiocarbamate, keep the temperature at 150°C, continue banburying in the internal mixer for 5min, and roll it into 2mm by double-roller rolling after discharging. The thin slices are put into the mold after being parked at room temperature for 24 hours, and vulcanized in a flat vulcanizing machine. The vulcanization temperature is 160°C, the vulcanization pressure is 15MPa, and the vulcanization time is 18min. Corroded rubber waterstop. The tensile strength of the prepared rubber waterstop is 12.3MPa, an...

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Abstract

The invention relates to a hydrogen sulfide corrosion resisting rubber waterstop strip and a method for producing the same. The hydrogen sulfide corrosion resisting rubber waterstop strip is characterized by comprising the following raw materials by weight portion: 100 portions of thylene propylene diene monomer rubber, 3-20 portions of organic rectorite, 30-80 portions of reinforcing agent, 1-3 portions of vulcanizing agent, 1-8 portions of vulcanizing activator and 1-3 portions of vulcanization accelerator. The organic rectorite is organically processed by using synthesized organic intercalator; the processed organic rectorite is mixed together with the thylene propylene diene monomer rubber, the reinforcing agent, the vulcanizing agent, the vulcanizing activator and the vulcanization accelerator; and the mixture is pressed flat and vulcanized to obtain thehydrogen sulfide corrosion resisting rubber waterstop strip. The hydrogen sulfide corrosion resisting rubber waterstop strip hasthe excellent hydrogen sulfide corrosion resistance.

Description

technical field [0001] The invention relates to a rubber waterstop resistant to hydrogen sulfide corrosion and a preparation method thereof. Background technique [0002] With the acceleration of urbanization, traffic congestion, environmental pollution and energy crisis have become urgent problems to be solved. In addition to avoiding urban ground congestion and making full use of space, underground transportation such as subways also has the advantages of large transportation volume, fast speed, and low pollution. It has become the first choice to solve urban transportation problems. [0003] In the construction process of some underground projects, due to the impossibility of continuous pouring, or the thermal expansion and contraction of concrete members caused by the deformation of the foundation and the change of temperature, it is necessary to leave construction joints, settlement joints and deformation joints. Rubber waterstops must be installed to prevent water lea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/38C08L23/16C08K13/06C08K3/34B29C43/24B29C35/02B29B7/28C09C1/40C09C3/08
Inventor 余剑英周少东冯振刚傅志峰吴少鹏徐建平杨盛华林文书况栋梁周华杰张恒龙王红喜熊朝辉王金龙
Owner WUHAN UNIV OF TECH
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