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Preparation method of chlorosulfonated polyethylene rubber

A technology for chlorosulfonated polyethylene and polyethylene, applied in the field of rubber production, can solve the problems of low yield of chlorosulfonated polyethylene, difficult vulcanization and rolling, insufficient reaction, etc., and achieves high production cost, high viscosity improvement, fully responsive effect

Inactive Publication Date: 2014-03-05
JINAN DEV ZONE XINGHUO SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing chlorosulfonated polyethylene preparation process, due to the characteristics of high viscosity of chlorosulfonated polyeth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of chlorosulfonated polyethylene rubber, comprising the following steps:

[0017] (1) Preparation: Mix polyethylene and sulfonyl chloride at a weight ratio of 1:1 to prepare a raw material solution, wherein polyethylene is composed of low-density polyethylene and linear low-density polyethylene at a weight ratio of 1:1;

[0018] (2) Reaction: The raw material solution obtained in step (1) is added from the top of the tower reactor, chlorine gas is added from the bottom of the tower reactor, and polyethylene, chlorine and sulfuryl chloride are chlorinated and chlorine-treated in the tower reactor. Sulfonation reaction, the reaction residence time is controlled at 50 minutes to obtain chlorosulfonated polyethylene rubber;

[0019] (3) Tail gas recovery: the chlorine gas overflowing from the top of the tower in step (2) is recycled through the lye tank.

[0020] In the step (2), a liquid distributor is arranged on the top of the tower reactor.

[002...

Embodiment 2

[0026] A preparation method of chlorosulfonated polyethylene rubber, comprising the following steps:

[0027] (1) Preparation: Mix polyethylene and sulfonyl chloride at a weight ratio of 1:1.3 to prepare a raw material solution, wherein polyethylene is composed of low-density polyethylene and linear low-density polyethylene at a weight ratio of 3:1;

[0028] (2) Reaction: The raw material solution obtained in step (1) is added from the top of the tower reactor, chlorine gas is added from the bottom of the tower reactor, and polyethylene, chlorine and sulfuryl chloride are chlorinated and chlorine-treated in the tower reactor. Sulfonation reaction, the reaction residence time is controlled at 80 minutes to obtain chlorosulfonated polyethylene rubber;

[0029] (3) Tail gas recovery: the chlorine gas overflowing from the top of the tower in step (2) is recycled through the lye tank.

[0030] In the step (2), a liquid distributor is arranged on the top of the tower reactor.

[0...

Embodiment 3

[0036] A preparation method of chlorosulfonated polyethylene rubber, comprising the following steps:

[0037] (1) Preparation: Mix polyethylene and sulfonyl chloride at a weight ratio of 1:1.2 to prepare a raw material solution, wherein polyethylene is composed of low-density polyethylene and linear low-density polyethylene at a weight ratio of 1.5:1;

[0038] (2) Reaction: The raw material solution obtained in step (1) is added from the top of the tower reactor, chlorine gas is added from the bottom of the tower reactor, and polyethylene, chlorine and sulfuryl chloride are chlorinated and chlorine-treated in the tower reactor. Sulfonation reaction, the reaction residence time is controlled at 65 minutes to obtain chlorosulfonated polyethylene rubber;

[0039] (3) Tail gas recovery: the chlorine gas overflowing from the top of the tower in step (2) is recycled through the lye tank.

[0040] In the step (2), a liquid distributor is arranged on the top of the tower reactor.

...

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PUM

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Abstract

The invention belongs to the technical field of production of rubber and in particular relates to a preparation method of chlorosulfonated polyethylene rubber. The preparation method of the chlorosulfonated polyethylene rubber comprises the following steps: (1) preparation; (2) reaction; and (3) recovery of tail gas. The method has the advantages of simplicity in operation, high production efficiency, capability of recycling chlorine gas and cost-saving property.

Description

technical field [0001] The invention belongs to the technical field of rubber production, and in particular relates to a preparation method of chlorosulfonated polyethylene rubber. Background technique [0002] Chlorosulfonated polyethylene (CSM for short) is a kind of special rubber obtained by chlorination and chlorosulfonation of polyethylene. Because it has excellent weather resistance, heat resistance, ozone resistance, and chemical resistance, it is obtained Widely used, the consumption is increasing year by year. With the progress of polymer synthesis technology and the continuous development of polymer material industry, the grades of polyethylene are also increasing and the structure is diversified, which makes the grades of chlorosulfonated polyethylene products also increase. Gaomen New grades of high-quality chlorosulfonated polyethylene for special purposes such as Nigeria have also come out, and the market application fields have become more and more extensive....

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F8/38C08F8/22
Inventor 车春玲
Owner JINAN DEV ZONE XINGHUO SCI & TECH RES INST
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