Meeting with water, inflated rubber made from resin capable of inflating if absorbing water, and preparation method

A water-swelling rubber and water-swelling technology, applied in the field of waterproof materials, can solve the problems of easy precipitation, intolerant of ions, low expansion rate of expansion rubber, etc., and achieve the effects of good ion resistance, difficult precipitation, and high expansion rate.

Inactive Publication Date: 2005-01-12
JIANGSU CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of existing expansive rubber is: 1, take water-soluble polyurethane as expansion agent to make the expansion ratio of expansion rubber low; Not resistant to ions, easy to precipitate when exposed to water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of synthetic method of expanded resin that the present invention adopts, comprises the following steps:

[0027] A) be the polyoxyethylene ether (meth)acrylic acid ester of 30 parts by weight, molecular weight is 420, the acrylonitrile that is 3 parts by weight, 45 parts of sodium acrylate, 22 parts of (meth) hydroxyethyl acrylate, in Add to the reaction kettle at 10-25°C and stir evenly;

[0028] B) Add 1.5 parts of diethanolamine in batches as a catalyst, 0.025 parts of N, N'-methylenebisacrylamide as a crosslinking agent, and 0.41 parts of sodium persulfate as an initiator in the reactor, stirring;

[0029] C) After uniform stirring for 20 minutes, the material is discharged, and after 2 hours, it is polymerized into a gel-like water-absorbing swelling resin.

[0030] The water-absorbing swelling resin synthesized by the above method is composed of 30 parts of polyoxyethylene ether (meth) acrylate, 3 parts of acrylonitrile, 45 parts of sodium acrylate, 22 par...

Embodiment 2

[0032] Another method for synthesizing the water-swellable resin of the present invention comprises the following steps:

[0033] A) Add 3 parts by weight of acrylonitrile and 42.7 parts of sodium acrylate into the reactor, stir evenly at 20°C, then slowly add 32.8 parts of polyoxyethylene ether (meth)acrylate (molecular weight) dropwise while stirring 420) and 15.4 parts of (meth)hydroxyethyl acrylate, stirred evenly;

[0034] B) Add 1.5 parts of diethanolamine, 0.025 parts of N, N'-methylenebisacrylamide and 0.41 parts of sodium persulfate to the reaction kettle in 3 times at 20°C, and stir;

[0035] C) After stirring evenly for 20 minutes, discharge the material, and polymerize into a gel-like water-absorbing swelling resin after 1.5 hours.

[0036] serial number

Embodiment 3

[0038] A kind of preparation method of water-swellable rubber of the present invention comprises the following steps:

[0039]a) 100 parts by weight of chloroprene rubber with a brand name of CR-121, and 100 parts of the water-absorbing swelling resin synthesized in Example 2 are carried out in a banbury mixer at a high temperature at a temperature of 130° C., and the banbury time is about 35 minutes;

[0040] b) Cool down to 70°C, add 23.9 parts of clay, 6.1 parts of carbon black as filler, 4 parts of magnesium oxide, 2.5 parts of zinc oxide, 0.8 parts of DM as accelerator, 1 part of DFC-34 as anti-aging agent, 4 parts of stearin Acid and 12.5 parts of dioctyl esters are used as softening agent, kneaded evenly on the kneading agent, open and cool;

[0041] c) After being parked at room temperature for 14 hours, put it into a mold, keep it at 120°C for 30 minutes with a flat rubber vulcanizer, vulcanize and form it, and make an expanded rubber product.

[0042] seri...

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PUM

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Abstract

In the present invention, resin expending on water absorption is prepared by polymerization of synthetic monomer of propenoic acid ester containing polyoxyvinyl ether, catalyst, initiator and cross-linking agent; rubber expending on water contact is prepared from resin expending on water absorption, polychloroprene, filler, softener, promoter and antiager through mixing and valcanizing.

Description

1. Technical field [0001] The invention belongs to a waterproof material, in particular to a water-swellable resin and a synthesis method thereof, as well as a water-swellable rubber prepared from the water-swellable resin and a preparation method thereof. 2. Background technology [0002] Water-swellable water-stop rubber is a new type of waterproof material, which has a unique water-stop mechanism: on the one hand, it has the elasticity and extensibility of rubber waterproof products, and acts as an elastic seal; It is a functional polymer material with double water-stopping effect. As far as the international scope is concerned, the development of water-swellable waterproof materials generally depends on the development of swelling agents, that is, water-swellable resins. [0003] Water-expandable rubber waterproof materials first appeared in the mid-1970s. In order to solve the problem of underground engineering leakage, Japan, Europe and the United States first propose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08K5/47C08L33/14
Inventor 郁维铭徐文君朱杰连占胡杰
Owner JIANGSU CHEM RES INST
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