High strength hydro-expansive rubber

A water-swellable rubber, high-strength technology, applied in the field of expanded rubber, can solve the problems of rubber products prone to blooming, affecting product appearance, and product loss of elasticity, etc., to improve appearance quality, not easy to harden, and good expansion effect. Effect

Inactive Publication Date: 2008-11-19
SHANGHAI JIEQIN RUBBER & PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The tensile strength is low and the scope of application is narrow;
[0004] 2. In winter, the product gradually hardens and loses its elasticity, which is very inconvenient to use in engineering and can only be used after heating;
[00

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1-3

[0022] The preparation process of a high-strength water-swellable rubber is:

[0023] Weigh all the raw materials in parts by weight (see the table below), put the neoprene rubber and natural rubber into an open mill for mastication, the mastication temperature is 80℃, the mastication time is 1 hour, and the prepolymer and dihydroxy The polyether is fully stirred until foaming, and chloroprene rubber, natural rubber, octadecyl acid, N-phenyl-N'-isopropyl p-phenylenediamine, thiuram, commonly known as "accelerator TMTD", Benzothiazole disulfide, clay, calcium carbonate, pigments, polyurethane, dihydroxy polyether, and zinc oxide are poured into an open mill and rolled together until the rubber bag roller has no viscous liquid on the surface; then the next piece is left for 5 days; add Sulfur, fully agitate uniformly, and form by screw extrusion; finally, the molded rubber is vulcanized by adding sulfur in a flat vulcanizer, the vulcanization temperature is 145℃...

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PUM

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Abstract

The invention relates to high-strength water swelling rubber, which is characterized by comprising the following compositions: neoprene, caoutchouc, octadecyl acid, N-phenyl-N'-isopropyl para-phenylene diamine, thiuram, benzothiazole disulfide, pottery clay, calcium carbonate, pigment, polyamine ester, polyether diols, zinc oxide and sulfur. The technique for preparing the high-strength water swelling rubber is as follows: the neoprene and the caoutchouc are respectively plasticated, and preformed polymer and curing agent are fully stirred until foaming; raw materials are poured into a roll mill for rolling until sizing materials wrap the roll without viscous fluid on the surface, and fine stuff and accelerant are added for roll release according to the prior technological requirements; and finally sulfur is added into rolled rubber for sulfurization. The high-strength water swelling rubber has the advantages of high tensile strength, difficulty in stiffening and good swelling effect.

Description

technical field [0001] The invention relates to a high-strength water-swellable rubber, which is widely used in major engineering fields such as subways, tunnels, water conservancy, and sewage treatment, and belongs to the technical field of swelling rubber. Background technique [0002] Water-swellable rubber is a waterproof material widely used in major engineering fields such as subways, tunnels, water conservancy, and sewage treatment. For many years, ordinary water-swellable rubber has been used in engineering construction. Its main characteristics are Good elasticity and good water absorption. But it also has weaknesses: [0003] 1. The tensile strength is low and the scope of application is narrow; [0004] 2. In winter, the product gradually hardens and loses its elasticity, which is very inconvenient to use in engineering and can only be used after heating; [0005] 3. The surface of rubber products is prone to blooming, that is, a layer of light gray powdery thi...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L75/04C08L11/00C08K13/02C08K5/47C08K5/40B29B7/00B29B11/06B29C35/02
Inventor 冯建林寿金妹
Owner SHANGHAI JIEQIN RUBBER & PLASTIC
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