Preparation process of water swellable rubber

Abstract

The invention relates to a preparation process of water swellable rubber which relates to the technical field of waterproof materials for concrete road and bridge building and is characterized rubbery being prepared by mixing, milling and vulcanizing natural rubber, a modified starch grafted acrylate copolymer and an additive, wherein raw materials are in the following parts by weight: 10-60 parts of natural rubber, 10-40 parts of modified starch grafted acrylate copolymer, 0.3-3 parts of sulfur, 1-2 parts of vulcanization accelerator, 1-5 parts of zinc oxide and 0.5-2 parts of stearic acid. The preparation process is simple and has unique principle; and a prepared product has better elasticity, strength and extensibility, particularly has water swelling property, higher swelling rate and good water preventing and stopping effects and simultaneously has corrosion resistance to organic solvents, such as acid, alkali, salt, oil and the like, superior aging resistant performance, no flow at high temperature, no embrittlement cracking at low temperature, long service life, convenient construction, lower cost, no toxicity, no pollution and wide application range.

Description

technical field [0001] The invention relates to the technical field of concrete road and bridge building waterproof materials, in particular to a preparation process of water-swellable rubber. Background technique [0002] With the development of science and technology, all kinds of waterproof materials have developed rapidly, such as rubber and plastic waterproof materials, polyurethane waterproof materials, and the corresponding building waterproof technology requirements are getting higher and higher. When various water leakage and water seepage occur in various situations, the volume of the waterproof material does not change, and the water-stop function cannot be restored independently, thus losing the water-stop and waterproof functions. [0003] Now there are polyurethane-type water-swellable waterproof materials on the market, but their cost is high and their expansion rate is low, only about 250%. This has always been a major technical problem that people want to s...

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology, all kinds of waterproof materials have developed rapidly, such as rubber and plastic waterproof materials, polyurethane waterproof materials, and the corresponding building waterproof technology requirements are getting higher and higher. Due to various situations of water leakage and water seepage, the volume of the waterproof material does not change, and the water-stop function cannot be restored independently, thus losing the function of water-stop and waterproof

[0003] Now there are polyurethane water-swellable waterproof materials on the market, but its cost is high and its expansion rate is low, only about 250%.

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