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Preparation method of water-swelling rubber

A technology of water-swellable rubber and preparation steps, which is applied in the field of rubber materials, can solve problems such as poor salt resistance, and achieve the effects of improved salt resistance, good salt resistance, and perfect rubber interpenetrating network structure

Inactive Publication Date: 2019-06-18
庄文琴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention: Aiming at the problem of poor salt resistance of existing WSR materials, a preparation method of water-swellable rubber is provided

Method used

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  • Preparation method of water-swelling rubber

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Effect test

example 1

[0030] Take gelatinized starch, maleic anhydride monomer, acrylamide, acrylic acid, 1,2-polybutadiene, benzoyl peroxide, formaldehyde, dimethylamine, maleic anhydride monomer, acrylamide, acrylic acid, 1 , 2-polybutadiene and benzoyl peroxide are melted and mixed to obtain a melt, and gelatinized starch is added to the melt and stirred at a constant temperature to obtain a mixture. Formaldehyde and dimethylamine are added to the mixture, and Stir at 45°C for 1 hour, filter the precipitate, wash the precipitate twice with deionized water, dry it in an oven at 50°C to constant weight, and cool to room temperature to obtain a water-absorbing filler; take nitrile rubber, Water-absorbing filler, dicumyl peroxide, white carbon black, anti-aging agent 4010, salt hornwort extract, nitrile rubber, water-absorbing filler, dicumyl peroxide, white carbon black, anti-aging agent 4010 and salt horn grass The extracts are mixed and kneaded evenly to obtain a precursor, which is placed on a f...

example 2

[0032] Take gelatinized starch, maleic anhydride monomer, acrylamide, acrylic acid, 1,2-polybutadiene, benzoyl peroxide, formaldehyde, dimethylamine, maleic anhydride monomer, acrylamide, acrylic acid, 1 , 2-polybutadiene and benzoyl peroxide are melted and mixed to obtain a melt, and gelatinized starch is added to the melt and stirred at a constant temperature to obtain a mixture. Formaldehyde and dimethylamine are added to the mixture, and Stir for 1.5 hours at a temperature of 50°C, filter to obtain a precipitate, wash the precipitate twice with deionized water, and dry it in an oven at a temperature of 55°C to constant weight, and cool to room temperature to obtain a water-absorbing filler; take nitrile rubber , water-absorbing filler, dicumyl peroxide, white carbon black, anti-aging agent 4010, salt hornwort extract, nitrile rubber, water-absorbing filler, dicumyl peroxide, white carbon black, anti-aging agent 4010 and salt horn The grass extract is mixed and kneaded even...

example 3

[0034] Take gelatinized starch, maleic anhydride monomer, acrylamide, acrylic acid, 1,2-polybutadiene, benzoyl peroxide, formaldehyde, dimethylamine, maleic anhydride monomer, acrylamide, acrylic acid, 1 , 2-polybutadiene and benzoyl peroxide are melted and mixed to obtain a melt, and gelatinized starch is added to the melt and stirred at a constant temperature to obtain a mixture. Formaldehyde and dimethylamine are added to the mixture, and Stir for 2 hours at a temperature of 55°C, filter to obtain a precipitate, wash the precipitate with deionized water three times, and dry it in an oven at a temperature of 60°C to constant weight, and cool to room temperature to obtain a water-absorbing filler; take nitrile rubber, Water-absorbing filler, dicumyl peroxide, white carbon black, anti-aging agent 4010, salt hornwort extract, nitrile rubber, water-absorbing filler, dicumyl peroxide, white carbon black, anti-aging agent 4010 and salt horn grass The extracts are mixed and kneaded...

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Abstract

The invention relates to a preparation method of water-swelling rubber, and belongs to the technical field of rubber materials. An acrylamide copolymer is grafted with maleic anhydride, starch is gelatinized and then is used to graft the obtained maleic anhydride-acrylamide in order to prepare a starch-maleic anhydride-acrylamide copolymer used as a water-absorbing component and a compatibilizer for the water-swelling rubber, and nitrile butadiene rubber used as a matrix is combined with a vulcanizing agent dicumyl peroxide, a reinforcing agent white carbon black and an antioxidant 4010 to prepare the water-swelling rubber with good salt tolerance. -CONH2 in the acrylamide is a nonionic group, does not dissociate in water, and is less affected by ions, so the introduction of acrylamide cansignificantly improve the salt tolerance of the water-swelling rubber; and the water-absorbing component and water with different salinities form a large amount of hydrogen bonds, and the water-absorbing component is repeatedly soaked to stretch hydrophilic chains, so the rubber interpenetrating network structure becomes perfect, the flexibility is enhanced, and the tensile strength is increased,thereby the water-swelling has good salt tolerance.

Description

technical field [0001] The invention relates to a method for preparing water-swellable rubber, which belongs to the technical field of rubber materials. Background technique [0002] The demand for water-swellable materials in various fields is increasing day by day, but different fields have different requirements for them. Waterproof plugging and sealing of gaps in the construction industry requires WSR materials that can be cured at room temperature; flood prevention and water-proof industries require WSR materials that can expand rapidly and require low prices; and in the oil exploration industry, WSR materials that can withstand high temperatures, High pressure, high salinity and slow expansion properties. WSR materials with a single performance can no longer meet the technical needs of all industries. Therefore, expanding the functions of WSR materials in multiple aspects has become a new challenge in the field of WSR material research. However, after long-term use, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L51/02C08K13/02C08K3/36C08K5/14C08K5/00C08F251/00C08F222/06C08F220/56C08F220/06
Inventor 庄文琴
Owner 庄文琴
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