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Industrial production method for producing chlorinated rubber by aqueous phase suspension

A chlorinated rubber, water-phase suspension technology, applied in the field of polymer chemical industry, can solve the problems of personal harm, limited use, high cost of solvent method, and achieve the effects of short reaction time, easy operation and low cost

Inactive Publication Date: 2009-07-15
汪立波
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  • Abstract
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Problems solved by technology

[0002] Chlorinated rubber is chlorinated and produced by the solvent method. Due to the high cost of the solvent method, and some solvents such as carbon tetrachloride are harmful to the human body, volatiles pollute the environment and residual solvents in the product are limited in use. and other defects

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0008] Add 1500Kg of clean water and 100Kg of natural latex to a 2000-liter glass-lined reactor with stirring, then first add 500g of nonionic surfactants, and then add 500g of cationic surfactants. In the glass reactor, add peroxidation initiator 1000g at last. Under stirring and irradiation of ultraviolet light, the temperature is controlled below 10°C, and chlorine gas is introduced to carry out chlorination reaction. When the amount of chlorine gas introduced reaches 30% of the required amount, the temperature rises and enters the second stage, and the temperature is controlled at 10-40°C. When the amount of chlorine gas introduced reaches 80% of the required amount, the temperature rises and enters the third stage. Before the maximum temperature does not exceed 130°C, pass the remaining chlorine gas. The chlorine total amount that feeds is 360Kg. After the reaction, keep warm for 1.5 hours, then use clean air to drive away the residual chlorine in the kettle, and raise ...

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Abstract

The invention discloses an industrialized production method for preparing chlorinated rubber by an aqueous-phase suspension method. T method comprises the following steps: clear water and natural latex are added to a glass-lined reaction kettle with an agitator on the premise of aqueous-phase suspension state of the natural latex, then a nonionic surfactant, a cationic surfactant, and a peroxide initiator are added to the kettle respectively. The method is technologically characterized by introducing chlorine for a chlorination reaction under ultraviolet lamp radiation while stirring when the temperature is controlled below 10 DEG C, heating to 10-40 DEG C when the chlorine content reaches 30% of a theoretical value, introducing the rest chlorine when the chlorine content reaches 80% and the temperature is not higher than 130 DEG C, keeping the temperature for 0.5-2h after completion of the reaction, then replacing the residual chlorine in the kettle with clean air, and heating to 140 DEG C to degrade molecular weight of the chlorinated rubber; and then washing with water to deacidify, neutralizing, dehydrating and drying to obtain the chlorinated rubber finished product. The method has the advantages of no pollution to the surrounding environment, short reaction time, lower cost and considerable economic benefit.

Description

technical field [0001] The invention relates to the field of macromolecule chemical industry, and relates to an industrialized production method for producing chlorinated rubber by carrying out chlorination reaction with natural latex in a suspended state in water, and a finished chlorinated rubber product prepared by the method. Background technique [0002] Chlorinated rubber is chlorinated and produced by the solvent method. Due to the high cost of the solvent method, and some solvents such as carbon tetrachloride are harmful to the human body, volatiles pollute the environment and residual solvents in the product are limited in use. and other defects. [0003] Although there are literature reports at home and abroad on the production of chlorinated rubber by the aqueous phase suspension method, according to the novelty data, it is still in the research and test stage in China; although the Kashima plant of Japan Asahi Denka Corporation has an industrial production device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/14
Inventor 汪立波
Owner 汪立波
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