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Preparation method of chlorination butyl rubber

A technology of chlorinated butyl rubber and chlorine gas, which is applied in the field of chlorinated butyl rubber (CIIR) preparation, can solve the problems of environmental pollution and high production cost of chlorinated butyl rubber, avoid damage to the environment and operators, and reduce production costs. Low cost, convenient and reliable production operation and control

Active Publication Date: 2012-02-15
潍坊硕邑化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a product with reasonable technology, no organic chlorine solvent involved in the production process and application process, aiming at the problems of environmental pollution and high production cost in the production of existing chlorinated butyl rubber (abbreviated as CIIR). The performance can meet the needs, the production cost is low, and the method suitable for large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of chlorinated butyl gum, its step is as follows:

[0029] (1) Put 500g of powdered butyl rubber with an average particle size of 125μm and a Mooney viscosity (ML1+4, 100°C) of 42 into 2000g of water, 1g of fumed silica, 1g of benzoyl peroxide and In a 5000L glass reactor containing 0.5g polyether PF-10, start stirring to disperse the material evenly.

[0030] (2) Heat the reactor to raise the temperature of the material to 75°C, feed chlorine gas to react, control the flow rate of chlorine gas at 1g / min, when the reaction temperature reaches 90°C, feed 15g of chlorine gas in total, stop the flow of chlorine gas, and keep the reaction temperature at 90~ 95°C for 45 minutes, then add water into the jacket of the reactor to cool the material to 60°C, blow in nitrogen to drive off free chlorine, and then discharge the material out of the reactor.

[0031] (3) Put the material into the filter (using a 120-mesh filter cloth), filter out the aci...

Embodiment 2

[0035] A kind of preparation method of chlorinated butyl gum, its step is as follows:

[0036] (1) Put 30Kg of powdered butyl rubber with an average particle size of 150μm and a Mooney viscosity (ML1+4, 100°C) of 42 into 130Kg of 11% HCl aqueous solution, 50g of sodium polymethacrylate, 100g of In a 200L glass-lined reactor containing benzoyl oxide and 30g polyether PF-10, start stirring to disperse the material evenly.

[0037] (2) Introduce steam to the jacket of the reaction kettle to raise the temperature of the material to 75°C, then introduce chlorine gas, control the rate of chlorine gas flow to 50g / min, stop the flow of chlorine gas after introducing 780g of chlorine gas, keep the temperature of the material at 93°C for 35 minutes, pass through Nitrogen gas was added to remove residual chlorine in the reactor. Feed cooling water into the jacket of the reaction kettle to lower the temperature of the material to 60°C, open the discharge valve at the bottom of the reac...

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Abstract

The invention relates to the field of chlorination butyl rubber preparation, and more specifically relates to a preparation method of a chlorination butyl rubber. The method comprises steps of: adding powder butyl rubber and a reaction medium containing dispersant, initiator and surfactant according to a proportion into a chlorination reaction apparatus; letting in a specified amount of chlorine with stirring and carrying out a chlorination reaction with a reaction temperature maintained between 85 to 100 DEG C for more than 30 min to obtain a chlorination butyl rubber product with requirements reached. The invention employs a water phase suspension chlorination method to prepare the chlorination butyl rubber, without usage of organic chlorine solvent, so as to avoid damages on environment and operators caused by chlorine solvent escaping during production and usage processes. In addition, the invention has advantages of low production costs, small apparatus investment, convenient andreliable production operation and control and product satisfying requirements of rubber processing, etc.

Description

technical field [0001] The invention relates to the field of preparation of chlorinated butyl rubber (CIIR), in particular to a preparation method of chlorinated butyl rubber based on aqueous phase suspension chlorination. Background technique [0002] Chlorinated butyl rubber is an elastomer prepared by substitution reaction between butyl rubber and chlorine. It is a modified product of butyl rubber. Compared with butyl rubber, due to the introduction of chlorine, the vulcanization speed of butyl rubber is changed. Slow, poor compatibility with unsaturated rubber, poor self-adhesiveness and co-adhesiveness, it is widely used in the production of inner tubes of tires, tubeless sealing layers, sidewall rubber of radial tires, heat-resistant and heat-resistant conveyor belts, high-temperature rubber hoses , sealing and insulating materials, etc. [0003] The main production method of traditional chlorinated butyl rubber is to dissolve butyl rubber in an organic chlorine solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/12C08F8/22
Inventor 白杰
Owner 潍坊硕邑化学有限公司
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