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Production and preparation method of chlorinated rubber

A technology of chlorinated rubber and butadiene rubber, which is applied in the field of rubber production and can solve the problems of low safety and high requirements for production equipment

Inactive Publication Date: 2018-08-17
江蔓青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The chlorinating agent used in the existing chlorinated rubber production process is chlorine gas, which requires high production equipment and low safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Place the three-necked flask equipped with a condenser and agitator in an ice-water bath, first add sodium hypochlorite solution, start stirring, wait until the temperature drops to 0°C, then add tert-butanol and glacial acetic acid in sequence, wherein the molar ratio of sodium hypochlorite to tert-butanol is 1.4:1. After the reaction is complete, wash with 10% sodium carbonate solution to neutralize unreacted glacial acetic acid, and then wash with deionized water three times to remove unreacted raw materials. After drying with anhydrous calcium chloride, put it into a brown reagent bottle filled with anhydrous calcium chloride and store it in the refrigerator.

[0017] Dilute the original rubber solution of butadiene rubber with chloroform, the content of butadiene rubber is 3% (by mass), add the diluted butadiene rubber solution into a three-necked bottle, stir and heat to 60°C, and add chloroacetic acid. The temperature was raised to 70°C, and tert-butyl hypochlor...

Embodiment 2

[0020] Place the three-necked flask equipped with a condenser and agitator in an ice-water bath, first add sodium hypochlorite solution, start stirring, wait until the temperature drops to 0°C, then add tert-butanol and glacial acetic acid in sequence, wherein the molar ratio of sodium hypochlorite to tert-butanol is 1.2:1. After the reaction is complete, wash with 10% sodium carbonate solution to neutralize unreacted glacial acetic acid, and then wash with deionized water three times to remove unreacted raw materials. After drying with anhydrous calcium chloride, put it into a brown reagent bottle filled with anhydrous calcium chloride and store it in the refrigerator.

[0021] Dilute the original rubber solution of butadiene rubber with chloroform, the content of butadiene rubber is 2.5% (by mass), add the diluted butadiene rubber solution into a three-necked bottle, stir and heat to 60°C, and add chloroacetic acid. The temperature was raised to 70°C, and tert-butyl hypochl...

Embodiment 3

[0024] Place the three-necked flask equipped with a condenser and agitator in an ice-water bath, first add sodium hypochlorite solution, start stirring, wait until the temperature drops to 0°C, then add tert-butanol and glacial acetic acid in sequence, wherein the molar ratio of sodium hypochlorite to tert-butanol is 1.6:1. After the reaction is complete, wash with 10% sodium carbonate solution to neutralize unreacted glacial acetic acid, and then wash with deionized water three times to remove unreacted raw materials. After drying with anhydrous calcium chloride, put it into a brown reagent bottle filled with anhydrous calcium chloride and store it in the refrigerator.

[0025] Dilute the original rubber solution of butadiene rubber with chloroform, the content of butadiene rubber is 5% (by mass), add the diluted butadiene rubber solution into a three-necked bottle, stir, heat to 60°C, and add chloroacetic acid. The temperature was raised to 70°C, and tert-butyl hypochlorite...

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PUM

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Abstract

The invention discloses a preparation method of chlorinated rubber, and relates to the technical field of rubber production. The preparation method comprises the three steps of synthesis of a chlorinating agent and tert-butyl hypochlorite, chlorination reaction and post-treatment, wherein ultraviolet radiation is introduced in the chlorination reaction. By adopting the preparation method of the chlorinated rubber disclosed by the invention, the production cost is lowered. Moreover, production equipment is simple, the chlorination efficiency is improved, the chlorine content of the chlorinatedrubber is up to 68 percent, and the technical indexes fully meet the use requirements.

Description

technical field [0001] The invention relates to the technical field of rubber production, in particular to a production and preparation method of chlorinated rubber. Background technique [0002] Chlorinated rubber is modified from natural rubber or synthetic rubber by chlorination reaction. It has excellent film-forming properties, adhesion, abrasion resistance, corrosion resistance and outstanding quick-drying and water-repellent properties. It is an important coating raw material and is a rubber derivative. It can be combined with natural or various synthetic resins and rubbers. Used together, in most cases, it can improve the hardness and wear resistance of the product, and it is very important for coatings and adhesives that have higher requirements for creep resistance. [0003] The chlorinating agent used in the existing chlorinated rubber production process is chlorine gas, which has high requirements on production equipment and low safety. Using a liquid chlorinat...

Claims

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Application Information

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IPC IPC(8): C08C19/12
CPCC08C19/12
Inventor 江蔓青
Owner 江蔓青