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Preparation method of aramid fiber reinforced water-swellable nitrile rubber

A nitrile rubber, water-swelling technology, applied in the field of composite materials, can solve problems such as poor compatibility and reduced WSR mechanical properties, and achieve the effects of high water absorption, improved mechanical properties, and wide application fields.

Active Publication Date: 2018-11-06
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results show that although the addition of polyethylene glycol can form a large number of water absorption channels and improve the water absorption performance of WSR, polyethylene glycol is a crystalline polymer and has poor compatibility in rubber, which will lead to a decrease in the mechanical properties of WSR.

Method used

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  • Preparation method of aramid fiber reinforced water-swellable nitrile rubber
  • Preparation method of aramid fiber reinforced water-swellable nitrile rubber
  • Preparation method of aramid fiber reinforced water-swellable nitrile rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0030] Utilize modified aramid fiber to prepare the specific application of water-absorbing swellable nitrile rubber, its step is as follows:

[0031] 1) Put 100 parts of nitrile rubber on the open mill for 1 min and then add 1.5 parts of stearic acid, 5 parts of ZnO, and 1.5 parts of anti-aging agent N-isopropyl-N'-benzene Base p-phenylenediamine, 1.5 parts of thiazole accelerator (2,2'-dithiodibenzothiazole), 1.5 parts of vulcanization accelerator N-cyclohexyl-2-benzothiazole sulfenamide, 1.5 parts After the sublimation sulfur was refined for 3 minutes at a roll distance of 2 mm, 1, 3, 5, 8, and 10 parts of modified aramid fiber and 60 parts of sodium polyacrylate were added and mixed evenly, and the rolling was carried out at a roll distance of 3 mm. Refining for 10 minutes, finally, add 20 parts of natural gas channel black and 20 parts of precipitated silica to the rubber matrix and mix evenly. Under the roller distance of 0.4 mm, make triangular bags 7 times, thinly pass...

Embodiment 6～10

[0045] 1) Put 100 parts of nitrile rubber on the open mill for 1 min and then add 1.5 parts of stearic acid, 5 parts of ZnO, and 1.5 parts of anti-aging agent N-isopropyl-N'-benzene Base p-phenylenediamine, 1.5 parts of thiazole accelerator (2-mercaptobenzothiazole), 1.5 parts of vulcanization accelerator N-cyclohexyl-2-benzothiazole sulfenamide, 1.5 parts of sulfur, in After kneading for 3 minutes at a roller distance of 2mm, add 1, 3, 5, 8, 10 parts of unmodified aramid fiber and 60 parts of water-absorbent resin and mix evenly, and knead for 10 minutes at a roller distance of 3mm. , add 20 parts of natural gas channel black and 20 parts of precipitated silica to the rubber matrix and mix evenly. Under the roller distance of 0.4 mm, make a triangle bag 7 times, thinly pass, and the next sheet, and stand for 12 hours for later use.

[0046] 2) Put the mixed nitrile rubber obtained in step 1) on the open mill, and then gradually increase the roll distance of the open mill from...

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Abstract

The invention discloses a preparation method of aramid fiber reinforced water-swellable nitrile rubber. After nitrile rubber is plasticated on an open mill for 1 min by a thin-passing and roller-coating manner, an active agent A, an active agent B, an anti-aging agent, a vulcanization accelerator A, a vulcanization accelerator B, and a vulcanizing agent are sequentially added, the nitrile rubber is open-milled evenly for 3 min under a roll distance of 2 mm; fiber and water-absorbent resin are added to mix uniformly, and the nitrile rubber is open-milled for 10 min under a roll distance of 3 mm; finally, carbon black and white carbon black are added to a rubber matrix and kneaded evenly, under a roll distance of 0.5mm, the nitrile rubber is coated to form a triangle nitrile rubber bag for 7times, performing thin-passing, unloading pieces, and standing; after thin-passing of the obtained rubber in the open mill, gradually increasing the roll gap of the open mill from 2mm to 5mm, allowing the rubber to repeatedly pass through a roller to orientate the fiber along the rolling direction of the rubber, and standing after the fiber is completely orientated along the rolling direction ofthe rubber; placing the obtained rubber in a tableting mold, vulcanizing for 10min at 160DEG C under 10Mpa in a flat vulcanizing machine, opening the mold, standing, and cutting.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of aramid fiber-reinforced water-absorbing swellable nitrile rubber. Background technique [0002] As a multifunctional elastic material, Water swelling Rubber (WSR for short) was developed abroad in the late 1970s and early 1980s, and has been widely used in leak plugging projects for its unique water-tight sealing and water-stopping properties. s concern. With the rapid development of industry, the requirements for the performance of water-swellable rubber products are getting higher and higher. They should have certain mechanical properties, fast and high-rate water absorption, and low mass loss rate after water absorption. Compared with other modification methods, such as main body The modification of materials and the improvement of blending process, the modification process is relatively cumbersome, and requires high equipment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L77/10C08L33/02C08K13/02C08K3/22C08K5/09C08K5/18C08K3/04C08K3/36B29B7/00B29C35/02
CPCB29B7/007B29C35/02C08K2003/2296C08L9/02C08L2205/03C08L2205/16C08L77/10C08L33/02C08K13/02C08K3/22C08K5/09C08K5/18C08K3/04C08K3/36
Inventor 杨隽徐恩松范志玮潘小杰王芬
Owner WUHAN INSTITUTE OF TECHNOLOGY