Method for preparing high-temperature-rusistance water-expansible rubber

A water-swellable rubber and high-temperature-resistant technology, which is applied in chemical instruments and methods, and other chemical processes, can solve problems such as poor temperature resistance, and achieve the effects of low equipment requirements, simple process, and controllable expansion ratio

Inactive Publication Date: 2007-08-15
WUHAN CHEM COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of the existing water-swellable rubber such as poor temperature resistance, and use a monomer with a special structure as a comonomer to prepare a high-temperature-resistant water-absorbing resin. Prepare raw materials for rubber with water-swellable properties at high temperatures from 25°C to 150°C

Method used

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  • Method for preparing high-temperature-rusistance water-expansible rubber

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Experimental program
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Effect test

Embodiment 1

[0022] Add 2 g of acrylic acid, 4 g of sodium acrylate, 2 g of acrylamide, 2 g of 2-acrylamido-2-methylpropanesulfonic acid, 0.2 g of diethylene glycol diacrylate, 50 ml of toluene, and 1 g of Span-80 In the reactor, the temperature was raised to 75°C under constant stirring, and the initiator potassium persulfate was added dropwise for copolymerization reaction for 3 hours, filtered, washed and dried with methanol to obtain water-absorbent resin powder, and then 100 parts of nitrile rubber, 30 parts of water-absorbent resin powder , 5 parts of zinc oxide, 2 parts of sulfur, 1 part of anti-aging agent, 20 parts of carbon black, and 2.5 parts of accelerator are blended and vulcanized on an open mill to obtain water-swellable rubber in the range of 25°C to 150°C. Weigh 8 grams of the water-swellable rubber and 80 grams of deionized water, put them into an autoclave, seal it, heat the autoclave to 150°C and keep it warm for 3 days, then quickly lower it to room temperature, take o...

Embodiment 2

[0024] 2.5 g of acrylic acid, 3 g of sodium acrylate, 3 g of acrylamide, 1.5 g of 3-acrylamidopropyltrimethylammonium chloride (APTAC), 0.1 g of N,N'-methylenebisacrylamide, 50 mL of solvent Add cyclohexane and 1 gram of Span-60 into the reactor, raise the temperature to 60°C under constant stirring, add the initiator potassium persulfate dropwise for 4 hours of copolymerization reaction, filter, wash and dry with methanol to obtain water-absorbent resin powder, and then 100 parts Nitrile rubber, 30 parts of water-absorbing resin powder, 5 parts of zinc oxide, 2 parts of sulfur, 1 part of anti-aging agent, 20 parts of carbon black, 2.5 parts of accelerator are blended on an open mill and vulcanized at 25°C to 150°C Water-swellable rubber within the range. Weigh 8 grams of the water-swellable rubber and 80 grams of deionized water, put them into an autoclave, seal it, heat the autoclave to 150°C and keep it warm for 3 days, then quickly lower it to room temperature, take out th...

Embodiment 3

[0026] 3 g of acrylic acid, 3.5 g of sodium acrylate, 1.5 g of acrylamide, 2 g of methacrylamidopropyltrimethylammonium chloride (MPTMA), 0.3 g of N,N'-methylenebisacrylamide, 50 mL of solvent Cyclohexane and 1 gram of Span-60 were added to the reactor, and the temperature was raised to 85°C under constant stirring, and the initiator ammonium persulfate was added dropwise for a copolymerization reaction for 4 hours, filtered, washed and dried with methanol to obtain a water-absorbent resin powder, and then 100 parts Neoprene, 30 parts of water-absorbing resin powder, 1 part of stearic acid, 5 parts of zinc oxide, 4 parts of magnesium oxide, 1 part of anti-aging agent, 30 parts of pottery clay are blended on an open mill and vulcanized at 25 ° C to 150 Rubber that can expand with water in the temperature range. Weigh 8 grams of the water-swellable rubber and 80 grams of deionized water, put them into an autoclave, seal it, heat the autoclave to 150°C and keep it warm for 3 days...

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Abstract

The invention relates to a method to manufacture functional rubber that could be expand when meet water between the temperature 25 degree centigrade and 150 degree centigrade. The process is: taking copolymerization by acrylic acid, sodium acrylate, acrylamide, heat endurable modification monomer and cross linking agent to gain heat endurable water absorbing resin powder, then, mixing and vulcanizing the mixture of the powder and rubber to gain high temperature endurable water expanding rubber. It has simple technology and low cost.

Description

technical field [0001] The invention relates to the field of sealing materials, in particular to a preparation method of high-temperature-resistant water-swellable rubber. Background technique [0002] Water swelling rubber (WSR for short) is a new type of functional material, which is made by introducing hydrophilic functional groups or hydrophilic components into the traditional elastic matrix (rubber). Its mechanism of action is: when in contact with water, water molecules will enter the WSR through physical effects such as diffusion, capillary and surface adsorption, and then form a strong affinity with the hydrophilic groups in the rubber. Absorb water, causing the rubber to deform. When the deformation resistance and osmotic pressure difference are balanced, WSR remains relatively stable, achieving the effect of elasticity and water stop. Since its appearance in the late 1970s and early 1980s, WSR has been known for its unique dual water-stop characteristics of elasti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/02C08J3/24C09K3/10C08L7/00C08L9/00C08L23/16
Inventor 刘长生周爱军丁军平周浪汪艳
Owner WUHAN CHEM COLLEGE
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