Method for preparing water swelling rubber with good weather resistance

A technology of water-absorbing swelling rubber and weather resistance, which is applied in the field of preparation of water-absorbing swelling rubber, can solve the problems of low water-absorbing expansion ratio, poor elasticity of the rubber body, cumbersome process, etc., and achieve good water absorption performance and excellent weather resistance.

Active Publication Date: 2015-01-14
江苏悠谷未来科技有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The advantage of WSR obtained by chemical grafting is that it has the characteristics of good microscopic compatibility and high strength, and the product has stable physical properties in the repeated process of water absorption expansion and dehydration recovery in application. The disadvantage is that the grafting reaction is difficult, the process is cumbersome, and the cost is high. Low water expansion ratio and poor elasticity of the rubber body

Method used

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  • Method for preparing water swelling rubber with good weather resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1, take 30Kg of nitrile rubber, after pulverization, inject C ions into the nitrile rubber with an ion implanter to obtain modified nitrile rubber; the amount of C ions is 1Kg; the ion energy is 20keV; the beam density range is 0.5mA / cm 2 ; The ion source adopted is graphite with a purity of 99%;

[0033] The 2nd step, the modified acrylonitrile-butadiene rubber obtained in the 1st step is mixed with sodium polyacrylate 3Kg, chlorinated polypropylene (28% chlorine content) 4Kg, is evenly milled with an open mill, and the roll distance of the open mill is 2 mm, time 3min;

[0034] The 3rd step, add polyvinylpyrrolidone 2Kg, carbon black 2Kg and white carbon black 1Kg again, open mill evenly, the roller distance of open mill is 2 mm, time 8min;

[0035] In the 4th step, add vulcanization accelerator M 1Kg again, open mill evenly, the roller distance of open mill is 0.4 mm, time 3min, next sheet, leave standstill, standby;

[0036] Step 5: Sulfurize in a flat vul...

Embodiment 2

[0039] The first step, take 50Kg of nitrile rubber, after crushing, inject C ions to the nitrile rubber with an ion implanter to obtain modified nitrile rubber; the amount of C ions is 3Kg; the ion energy is 30keV; the beam density range is 0.8mA / cm 2 ; The ion source adopted is graphite with a purity of 99%;

[0040] The 2nd step, the modified acrylonitrile-butadiene rubber obtained in the 1st step is mixed with sodium polyacrylate 5Kg, chlorinated polypropylene (chlorine content 28%) 6Kg, mixes evenly with open mill, and the roll distance of open mill is 2 mm, time 5min;

[0041] The 3rd step, add polyvinylpyrrolidone 4Kg, carbon black 4Kg and white carbon black 3Kg again, open mill evenly, the roller distance of open mill is 2 mm, time 12min;

[0042] In the 4th step, add vulcanization accelerator M 2Kg again, open mill evenly, the roller distance of open mill is 0.4 mm, time 5min, the next sheet, leave standstill, for subsequent use;

[0043] Step 5: Sulfurize in a fl...

Embodiment 3

[0046] The first step, take 40Kg of nitrile rubber, after pulverization, inject C ions to the nitrile rubber with an ion implanter to obtain modified nitrile rubber; the amount of C ions is 2Kg; the ion energy is 25keV; the beam density range is 0.6 mA / cm 2 ; The ion source adopted is graphite with a purity of 99%;

[0047] The 2nd step, the modified acrylonitrile-butadiene rubber obtained in the 1st step is mixed with sodium polyacrylate 4Kg, chlorinated polypropylene (chlorine content 28%) 5Kg, mixes evenly with open mill, and the roll distance of open mill is 2 mm, time 4min;

[0048] The 3rd step, add polyvinylpyrrolidone 3Kg, carbon black 3Kg and white carbon black 2Kg again, open mill evenly, the roller pitch of open mill is 2 mm, time 10min;

[0049] The 4th step, add vulcanization accelerator M 2Kg again, open mill evenly, the roller distance of open mill is 0.4 mm, time 4min, next sheet, leave standstill, standby;

[0050] Step 5: Sulfurize in a flat vulcanizer, ...

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Abstract

The invention relates to a method for preparing water swelling rubber with good weather resistance and belongs to the technical field of high-molecular materials. The method comprises the following steps of: 1, crushing 30-50 parts by weight of nitrile rubber, and then implanting C ions into the nitrile rubber by using an ion implanter to obtain modified nitrile rubber; 2, uniformly mixing the modified nitrile rubber obtained in the step 1 with 3-5 parts by weight of sodium polyacrylate and 4-6 parts by weight of chlorinated polypropylene, and uniformly milling by using an open mill; 3, then adding 2-4 parts by weight of polyvinyl pyrrolidone, 2-4 parts by weight of carbon black and batching off, and standing for later use; 5, vulcanizing by a flat vulcanizing machine, opening a mould and standing. The water swelling rubber prepared through the method disclosed by the invention has the advantages of good water absorption property and excellent weather resistant property and can still have good water absorption property after being used in an acidic aqueous solution for multiple times.

Description

[0001] technical field [0002] The invention relates to a preparation method of water-absorbing swelling rubber with good weather resistance, and belongs to the technical field of polymer materials. [0003] Background technique [0004] Water Swelling Rubber (WSR for short) is a new type of functional polymer material developed by Japan in the late 1970s. In 1976, Japan Asahi Electric Chemical Co., Ltd. applied for the invention patent of water-swellable rubber for the first time. WSR is made by introducing hydrophilic groups or components into traditional elastic matrices (such as rubber and thermoplastic elastomers). The product can expand to several times or even hundreds of times its own mass or volume after absorbing water. It can adapt to structural deformation and generate greater expansion pressure. While maintaining the elasticity and strength of the matrix, it also has the ability to retain and stop water. Water-swellable rubber as a new type of functional ma...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L33/02C08L23/28C08L39/06C08L83/04C08L83/06C08K13/02C08K3/04C08K3/36C08K5/101C08K5/47B29C35/02
CPCC08L15/00C08L2205/03C08L2205/035C08L23/28C08L33/02C08L39/06C08K13/02C08K3/04C08K3/36C08K5/47C08L83/04C08L83/06C08K5/101
Inventor 张学平朱忠海
Owner 江苏悠谷未来科技有限公司
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