High-performance water swellable rubber and preparation method thereof

A water-swellable rubber, high-performance technology, applied in the field of rubber products, can solve problems such as hindering the use range of water-swelling rubber, restricting the development of water-swelling rubber, and decreasing mechanical properties, achieving controllable water-absorbing speed, mechanical properties and ion resistance. Strong, high expansion multiplier effect
CN103087367AActive Publication Date: 2013-05-08PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2013-05-08

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Abstract

The invention relates to a high-performance water swellable rubber and a preparation method of the water swellable rubber. The water swellable rubber comprises the following raw materials in parts by weight: 100 parts of a rubber matrix, 1-5 parts of a nitrine coupling agent, 20-60 parts of a water absorbing material and 10-80 parts of a filling agent. The preparation method of the water swellable rubber comprises the following steps of: plasticating the rubber matrix so as to obtain plasticated rubber; subsequently adding the rest materials except for the rubber matrix into the plasticated rubber according to the sequence that small materials are added firstly, large materials are added secondly, and liquid, a vulcanizing agent and an accelerant are added at last, so as to obtain a rubber compound; vulcanizing the rubber compound and preparing so as to obtain the high-performance water swellable rubber. The high-performance water swellable rubber has excellent mechanical properties and high swelling performance, is simple in process of the preparation method, lower in production cost and wide in application range, and is particularly suitable for being used as a sealing material in a working environment of an oil field under high-temperature and high-pressure condition.
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Description

technical field

[0001] The invention relates to a high-performance water-absorbing swelling rubber and a preparation method thereof, belonging to the technical field of rubber products. Background technique

[0002] Water Swellable Rubber (WSR for short) is a new type of functional polymer material first developed by Japan in the late 1970s. 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.

[0003] The preparation method of water-swellable rubber mainly contains the following two types:

[0004] (1) Physical blending method: According to the blending method, it can be divided into two ...

Claims

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