Preparation method of butyl rubber

A butyl rubber and preparation process technology, applied in the field of butyl rubber preparation, can solve the problems of rising product cost, product quality fluctuation, and high Mooney viscosity, avoiding frequent driving and stopping, ensuring continuous production, and improving processing performance effect

Inactive Publication Date: 2018-06-29
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the polymerization temperature is higher than -85°C, the particles in the slurry system are easy to aggregate into blocks, which will affect the mass transfer and heat transfer of the system, cause serious glue hanging and blockage, and will cause the polymerization tank to be shut down for cleaning, seriously affecting the continuous polymerization reaction. Operation cycle
In the production of butyl rubber, after each cycle of the polymerization reaction, the wall of the polymerization reactor and the glue on the tubes must be cleaned with a high-temperature solvent. Frequent start-up and shutdown will greatly reduce the effective production time, and the compressor during cleaning and other equipment are running as usual, so shortening the running cycle of the polymerization tank will not only lead to a decrease in the output of butyl rubber, but also increase the production cost of the product
The Mooney viscosity of the initial product caused by the polymerization reaction is high, and frequent start-up and shutdown will inevitably lead to large fluctuations in product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] At -60°C, weigh 0.1g of methyl ether and add it to 99.9g of monochloromethane to form a 0.1wt% monochloromethane solution. The purpose of this step is to facilitate the addition of methyl ether. After stirring for 30 minutes, the The solution was cooled to the reaction temperature -93°C to obtain a methyl ether solution.

[0035] At -60°C, measure ethylaluminum dichloride and hydrogen chloride and then add them to methylene chloride to form a catalyst solution, wherein the mass fraction of ethylaluminum dichloride is 0.15%, and ethylaluminum dichloride and hydrogen chloride The molar ratio of the catalyst solution was 9:1. After aging for 30 minutes, the temperature of the catalyst solution was lowered to the reaction temperature of -93°C.

[0036] The temperature of the reactor is -93°C, and 15 g of isobutylene, 85 g of monochloromethane, 1 g of the above-mentioned methyl ether solution, and 0.76 g of isoprene are sequentially added to obtain a reactant solution; the c...

Embodiment 2

[0040]At -60°C, measure ethylaluminum dichloride and hydrogen chloride and then add them to methylene chloride to form a catalyst solution, wherein the mass fraction of ethylaluminum dichloride is 0.15%, and ethylaluminum dichloride and hydrogen chloride The molar ratio of the catalyst solution was 9:1. After aging for 30 minutes, the temperature of the catalyst solution was lowered to the reaction temperature of -93°C.

[0041] At -60°C, weigh 0.1g of propylene oxide and add it to 99.9g of monochloromethane to form a 0.1wt% monochloromethane solution. The purpose of this step is to facilitate the addition of propylene oxide. After stirring for 30 minutes, The solution was cooled to the reaction temperature -93°C to obtain a propylene oxide solution.

[0042] Reactor temperature is -93 ℃, add 15g of isobutylene, 85g of monochloromethane, 5g of the above-mentioned propylene oxide solution, and 0.76g of isoprene to obtain a reactant solution; propylene oxide in the reactant solu...

Embodiment 3

[0046] At -60°C, measure ethylaluminum dichloride and hydrogen chloride and then add them to methylene chloride to form a catalyst solution, wherein the mass fraction of ethylaluminum dichloride is 0.15%, and The molar ratio was 9:1. After aging for 30 minutes, the catalyst solution was cooled down to the reaction temperature of -95°C.

[0047] At -60°C, weigh 0.1 g of methyl ether and add it to 99.9 g of monochloromethane to form a monochloromethane solution with a mass fraction of methyl ether of 0.1%. After stirring for 30 minutes, the solution was cooled to the reaction temperature of -93 °C to obtain a diethyl ether solution.

[0048] The temperature of the reactor is -93°C, and 15g of isobutylene, 85g of methylene chloride, 5g of the above-mentioned methyl ether solution, and 0.76g of isoprene are sequentially added to obtain a reactant solution; the mass content of methyl ether in the reactant solution It is 47.3mg / Kg. After stirring for 10 minutes, 22.63 g of the abo...

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Abstract

The invention provides a preparation method of a butyl rubber. The preparation method of the butyl rubber is characterized by comprising the steps of introducing an ether compound into a preparation process. According to the preparation method of the butyl rubber provided by the invention, lewis acid is adopted as an initiator, and the ether compound is introduced into a reaction system, so that mass and heat transfer of the reaction system can be effectively changed, the butyl rubber is uniformly dispersed in the system, continuous production of the butyl rubber is ensured, frequent startingand stopping during a production process are avoided, and the product quality stability is good. In addition, according to the preparation method of the butyl rubber provided by the invention, the molecular weight and the molecular weight distribution of the butyl rubber can be effectively adjusted, and the processability of the butyl rubber is improved.

Description

technical field [0001] The invention relates to the technical field of butyl rubber, in particular to a preparation method of butyl rubber. Background technique [0002] Butyl rubber is prepared by cationic copolymerization of isobutylene and a small amount of isoprene. It has good chemical stability, thermal stability, outstanding air tightness and water tightness, and its permeability to air is only It is 1 / 7 of natural rubber, 1 / 5 of styrene-butadiene rubber, and the vapor transmission rate is 1 / 200 of natural rubber, 1 / 140 of styrene-butadiene rubber. Capsules and other irreplaceable polymer materials. In addition, butyl rubber has the disadvantages of slow vulcanization speed, poor mutual adhesion with other rubbers, and weak interaction with reinforcing agents, which limits the use of butyl rubber. In the synthesis stage, by adjusting the molecular weight and molecular weight distribution of butyl rubber, its processing performance can be effectively improved. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/12C08F236/08C08F4/54C08F2/06
CPCC08F210/12C08F236/08C08F4/54C08F2/06
Inventor 荆帅林马韵升刘振学张杰张云奎卢春颖吴斌星朱来响韩飞张晓岭
Owner CHAMBROAD CHEM IND RES INST CO LTD
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