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Preparation method of high-performance water-swellable chloroprene rubber

A chloroprene rubber and water-swelling technology, applied in the rubber field, can solve the problems of reducing the water-absorbing and mechanical properties of water-swelling rubber, difficult to disperse the water-absorbing resin, and high production cost, and achieves small changes in the expansion rate, good compatibility, and water absorption. The effect of multiplying

Inactive Publication Date: 2014-02-19
ANHUI IND & TRADE VOCATIONAL TECHN COLLEGE
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AI Technical Summary

Problems solved by technology

[0004] The existing water-swellable rubber has the defects of unstable performance, difficulty in dispersing water-absorbent resin in rubber, and high production cost
Water-absorbing swellable rubber is mainly prepared by physical-mechanical blending of rubber and water-absorbing resin. Because rubber has low polarity and poor hydrophilicity, water-absorbing resin has good hydrophilicity and strong polarity, resulting in a phase difference between the two. poor tolerance
The most commonly used method in industry is to use the physical blending method to prepare water-swellable rubber. Due to the large difference in properties between the hydrophilic component and the rubber, the hydrophilic component is easy to precipitate, thereby reducing the water absorption of the water-swellable rubber. Properties and mechanical properties

Method used

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Embodiment Construction

[0025] In order to facilitate understanding of the present invention, the present invention enumerates the following examples. Those skilled in the art should understand that the examples are only used to help understand the present invention, and should not be regarded as specific limitations on the present invention.

[0026] A preparation method of high-performance water-swellable chloroprene rubber, comprising the following steps:

[0027] (1) After the chloroprene rubber is masticated on the open mill for 1 minute with a thin open roll, add active agent, sublimed sulfur, anti-aging agent, and water absorption additive in turn, and knead for 2 to 10 minutes at a roller distance of 2 mm;

[0028] (2) Add water-absorbing resin and knead evenly, then add reinforcing filler and knead for 5-20 minutes on a roller distance of 3mm;

[0029] (3) Add compatibilizer and mix evenly, and finally add vulcanization accelerator to the rubber matrix and mix evenly, make triangular bags 5...

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Abstract

The invention discloses a preparation method of high-performance water-swellable chloroprene rubber, which comprises the following steps: carrying out open milling on chloroprene rubber, preparing graft and the like. The preparation method saves the cost and is simple; and the prepared water-swellable rubber has the advantages of stable performance, strong acting force between the rubber base and water-absorbing resin, low shedding tendency of water-absorbing resin, higher water absorptivity, favorable compatibility between the water-absorbing resin and rubber, and small expansion ratio change after repeated water absorption.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to a preparation method of high-performance water-absorbing swellable chloroprene rubber. Background technique [0002] Water Swelling Rubber (WSR) 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. [0003] Water-swellable rubber, as a new type of functional material, has been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L11/00C08L51/04C08F279/02C08K13/02B29B7/72B29C35/02
Inventor 王小燕
Owner ANHUI IND & TRADE VOCATIONAL TECHN COLLEGE
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