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Preparation method of fiber-reinforced water-swellable nitrile rubber

A nitrile rubber and water-absorbing swelling technology, which is applied in the field of composite materials, can solve the problems of WSR mechanical properties reduction and poor compatibility, and achieve the effect of improving mechanical properties and wide application fields

Inactive Publication Date: 2018-09-28
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 fiber-reinforced water-swellable nitrile rubber
  • Preparation method of fiber-reinforced water-swellable nitrile rubber
  • Preparation method of fiber-reinforced water-swellable nitrile rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0026] Utilize acrylic fiber to prepare the specific application of water-absorbing swellable nitrile rubber, its step is as follows:

[0027] 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 part of anti-aging agent N-isopropyl-N'-benzene Base p-phenylenediamine, 1.5 parts of vulcanization accelerator 2, 2'-dithiodibenzothiazole, 1.5 parts of vulcanization accelerator N-cyclohexyl-2-benzothiazole sulfenamide, 1.5 parts of sublimation Sulfur, after the rolling distance is 2mm, it is evenly milled for 3 minutes, after adding 0, 5, 10, 15, 20 parts of acrylic fibers, 60 parts of sodium polyacrylate and mixed evenly, the rolling distance is 3 mm, and it is opened for 10 minutes, and 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 0.4mm, make a triangle bag 6 times, thin pass, and the next sheet, and st...

Embodiment 6～10

[0041] 1) After plasticizing 100 parts of nitrile rubber on the open mill for 1 minute with a thin open roll, add 1.5 parts of stearic acid, 5 parts of ZnO, and 1 part of anti-aging agent N,N'-bis(β-naphthalene base) p-phenylenediamine, 1.5 parts of vulcanization accelerator 2, 2'-dithiodibenzothiazole, 1.5 parts of vulcanization accelerator N-cyclohexyl-2-benzothiazole sulfenamide, 1.5 parts of Sulfur, after the roller distance is 2mm, knead evenly for 3 minutes, then add 10 parts of acrylic fiber, 40, 50, 60, 70, 80 parts of water-absorbent resin and knead evenly, and knead for 10 minutes on the roller distance of 3mm. Finally, Add 20 parts of natural gas channel black and 20 parts of precipitated silica into the rubber matrix and knead evenly. With a roll distance of 0.4 mm, make a triangular bag 6 times, pass through thinly, and leave it for 8 hours for later use.

[0042]2) Put the mixed nitrile rubber obtained in step 1) on the open mill, and then gradually increase the ...

Embodiment 11～15

[0049] 1) After putting 100 parts of nitrile rubber on the open mill for 1 min, add 1.5 parts of stearic acid, 5 parts of ZnO, 1 part of antioxidant N-phenyl-2-naphthylamine, 1.5 parts of vulcanization accelerator 2-mercaptobenzothiazole, 1.5 parts of vulcanization accelerator N-cyclohexyl-2-benzothiazole sulfenamide, 1.5 parts of sulfur, kneading evenly at a roll distance of 2mm After 3 minutes, add 10 parts of acrylic fibers and 60 parts of water-absorbent resin and mix evenly, and start refining for 10 minutes on a roll distance of 3 mm. Finally, add 20 parts of natural gas tank black, 0, 10, 20, 30, 40 parts Carbon black is added to the rubber matrix and mixed evenly. Under the roller distance of 0.4 mm, it is made into a triangle bag 6 times, thinly passed, and the next sheet is placed, and it is left to stand for 8 hours for later use.

[0050] 2) Put the mixed nitrile rubber obtained in step 1) on the open mill, and then gradually increase the roll distance of the open ...

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Abstract

The invention discloses a preparation method of fiber-reinforced water-swellable nitrile rubber. The preparation method comprises carrying out thin-passing coating plastication on nitrile rubber through an open mill for 1 min, orderly adding an active agent A, an active agent B, an antiager, a vulcanization accelerator A, a vulcanization accelerator B and a vulcanization agent into the rubber, carrying out uniform open milling at a roller distance of 2mm for 3min, adding fibers and a water-absorbing resin into the mixture, carrying out uniform stirring, carrying out open milling at a roller distance of 3mm for 10min, adding carbon black and white carbon black into the rubber matrix, carrying out uniform mixing, preparing a cornucopla 6 times at a roller distance of 0.4mm, carrying out thinpassing, carrying out batch-off, carrying out standing, carrying out thin-passing through an open mill, adjusting the roller distance of the open mill to 4mm from 2mm so that the fibers are orientedalong the direction of the rubber rolling, then carrying out standing, putting the fibers into a tableting mold, carrying out vulcanization at 160 DEG C under 10Mpa through a flat vulcanizing machine,carrying out demolding, taking out the vulcanized water-swellable nitrile rubber, and carrying out standing and sample cutting.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of fiber-reinforced water-absorbing swellable nitrile rubber. Background technique [0002] As a new type of water-absorbing material that emerged in the 1970s, Water swelling Rubber (WSR) has attracted extensive attention in leak plugging projects for its unique water-tight sealing and water-stopping properties. 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. The use of fillers is a relatively simple meth...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L33/20C08L33/02C08K13/02C08K5/18C08K5/47C08K5/09C08K3/22C08J5/04
CPCC08J5/046C08J2309/02C08J2433/02C08J2433/20C08K5/09C08K5/18C08K5/47C08K2003/2296
Inventor 杨隽范志玮徐恩松潘小杰王芬
Owner WUHAN INSTITUTE OF TECHNOLOGY