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Time-regulated high temperature resistant water swelling rubber composite sealing material and preparation method

A water-swellable rubber and composite sealing technology, which is applied to rubber layered products, chemical instruments and methods, layered products, etc., can solve problems such as plugging, failure to realize sealing function, and easy wear and tear

Active Publication Date: 2018-01-30
咸阳橡胶工业制品研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional vulcanized rubber is easy to wear during the transportation process, and cannot realize the sealing function (plugging) after reaching the working point

Method used

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  • Time-regulated high temperature resistant water swelling rubber composite sealing material and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The formula of rubber sealing material of the present invention, technology are as follows:

[0031] High temperature water-swellable rubber layer: 100 parts of fluororubber, 45 parts of polyacrylamide, 3 parts of magnesium oxide, 2 parts of PE wax, 2 parts of stearic acid, 5 parts of spray carbon black, 5 parts of precipitated silica, double 1.5 parts of phenolic AF, 0.5 parts of No. 5 phosphorus.

[0032] The preparation method of the high-temperature-resistant water-swellable rubber layer is as follows: first, plasticize the formulated amount of fluororubber in an open rubber mixer, cover the rolls, and add polyacrylamide in stages (after drying at 105°C for 2 hours) treated), magnesium oxide, PE wax, stearic acid, spray carbon black, precipitated silica, after 5 minutes of thinning, add bisphenol AF, No. Rubber compound. Put the mixed rubber material into the mold in the vulcanization equipment, and carry out vulcanization treatment. The temperature is 140-160°C, ...

Embodiment 2

[0036] The formula of rubber sealing material of the present invention, technology are as follows:

[0037] High temperature water-swellable rubber layer: 100 parts of fluororubber, 40 parts of sodium polyacrylate, 3 parts of magnesium oxide, 2 parts of PE wax, 2 parts of stearic acid, 5 parts of spray carbon black, 5 parts of precipitated white carbon black, double 1.5 parts of phenolic AF, 0.5 parts of No. 5 phosphorus.

[0038] The preparation method of the high temperature-resistant water-swellable rubber layer has the following steps: first, plasticize the fluororubber in the open rubber mixer, cover the rolls, and add sodium polyacrylate in stages (after drying at 105°C for 2 hours) treated), magnesium oxide, PE wax, stearic acid, spray carbon black, precipitated silica, after 5 minutes of thinning, add bisphenol AF, No. Rubber compound. Put the mixed rubber material into the mold in the vulcanization equipment, and carry out vulcanization treatment. The temperature is...

Embodiment 3

[0042] The formula of rubber sealing material of the present invention, technology are as follows:

[0043] High temperature water-swellable rubber layer: 100 parts of fluororubber, 45 parts of sodium polyacrylate, 3 parts of magnesium oxide, 2 parts of PE wax, 2 parts of stearic acid, 5 parts of spray carbon black, 5 parts of precipitated white carbon black, double 1.5 parts of phenolic AF, 0.5 parts of No. 5 phosphorus.

[0044] The preparation method of the high temperature-resistant water-swellable rubber layer has the following steps: first, plasticize the fluororubber in the open rubber mixer, cover the rolls, and add sodium polyacrylate in stages (after drying at 105°C for 2 hours) treated), magnesium oxide, PE wax, stearic acid, spray carbon black, precipitated silica, after 5 minutes of thinning, add bisphenol AF, No. Rubber compound. Put the mixed rubber material into the mold in the vulcanization equipment, and carry out vulcanization treatment. The temperature is...

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Abstract

The invention discloses a time-regulated high temperature resistant water swelling rubber composite sealing material and a preparation method. The composite sealing material comprises a time-regulatedrubber layer and a high temperature resistant water swelling rubber layer, wherein the high temperature resistant water swelling rubber layer comprises 100 parts of fluororubber, 20 to 70 parts of asuper absorbent material, 0 to 10 parts of magnesium oxide, 1 to 3 parts of PE wax, 1 to 3 parts of stearic acid, 2 to 30 parts of spraying carbon black, 2 to 30 parts of precipitated silica, 0.5 to 5parts of bisphenol AF, and 0 to 5 parts of phosphorus number 5; the time-regulated rubber layer comprises 100 parts of hydrogenated butadiene-acrylonitrile rubber, 1 to 5 parts of iron oxide red, 0 to 10 parts of a talcum powder, 0 to 20 parts of polyvinyl alcohol (PEG), 0.1 to 5 parts of peroxide, and 400 to 1000 parts of solvent methylbenzene. The material meets high temperature resistance, high pressure resistance and medium resistance; the volume of the material is not obviously changed during the conveying of the material; the time-regulated rubber layer can be broken within a certain time after the time-regulated rubber layer reaches an operating point, the fact that the volume expansion rate of high temperature resistant water swelling rubber reaches more than 300 percent of the original volume after the high temperature resistant water swelling rubber is in contact with water is guaranteed, and a sealing function is realized.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a time-controlled high-temperature-resistant water-swellable rubber composite sealing material and a preparation method thereof. Background technique [0002] In the 2000-3000 meters underground of the oil well, a sealing material is often needed to repair the leakage of the pipeline. The working point is remote, and the repair can only be controlled indirectly. However, conventional vulcanized rubber is easy to wear during the transportation process, and cannot achieve the sealing function (plugging) after reaching the working point. [0003] The sealing material should be resistant to high temperature, high pressure, and medium. It is necessary to ensure that the sealing material cannot be worn out before being transported to the working point, and the volume does not change significantly (<10%). The sealing material volume changes significantly within the...

Claims

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Application Information

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IPC IPC(8): C08L27/12C08L23/06C08L33/26C08L33/02C08K13/02C08K3/22C08K5/09C08K3/04C08K3/36C08L15/00C08L29/04C08K3/34C08K5/14B32B25/04
Inventor 李蒙冯洪福刘守兴
Owner 咸阳橡胶工业制品研究所有限公司