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Butyl rubber production process

A production process, the technology of butyl rubber, applied in the field of butyl rubber production process, can solve the problems of low self-sufficiency rate of products, difficulty in continuous and stable operation of equipment, and unsatisfactory production capacity and output of butyl rubber in China

Inactive Publication Date: 2020-04-17
山东京博中聚新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the above problems, it is difficult for the device to operate continuously and stably. As a result, the production capacity and output of butyl rubber in China cannot meet the actual production needs, and the product self-sufficiency rate is low.

Method used

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  • Butyl rubber production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1.1 At -70°C, weigh 22.5g of isobutylene and add it to 127.5g of methylene chloride, then add 1g of isoprene and mix evenly to obtain a monomer solution.

[0036] 1.2 Weigh 0.002g of tert-butylamine and add it into the monomer solution to obtain a reactant solution, and cool down the solution to -95°C.

[0037] 1.3 At -70°C, weigh 0.2g of 20% dichloroethylaluminum solution, add it to 10g of 0.025wt% HCl in methylene chloride solution and mix evenly to obtain a catalytic system. After aging for 30min at -88°C, The temperature was lowered to -95°C.

[0038] 1.4 Add the catalytic system into the reactant solution and react at -95°C for 20 minutes to obtain a uniformly dispersed slurry in the form of particles.

[0039] 1.5 Add 2g of ethanol to terminate the reaction, put the slurry in a vacuum drying oven to remove the solvent to obtain butyl rubber.

[0040] The butyl rubber obtained in Example 1 was subjected to nuclear magnetic analysis, Mooney viscosity analysis (usi...

Embodiment 2

[0042] 2.1 At -70°C, weigh 20g of isobutylene and add it to 113.5g of methylene chloride, then add 1.3g of isoprene and mix evenly to obtain a monomer solution.

[0043] 2.2 Weigh 0.0025 g of trimethylamine and add it to the monomer solution to obtain a reactant solution, and cool the solution to -97°C.

[0044] 2.3 At -70°C, weigh 0.15g of 20% dichloroethylaluminum solution, add it to 6g of 0.02wt% HCl in methylene chloride solution and mix evenly to obtain a catalytic system. After aging at -90°C for 20 minutes, The temperature was lowered to -97°C.

[0045] 2.4 Add the catalytic system into the reactant solution and react at -97°C for 10 minutes to obtain a uniformly dispersed slurry in the form of particles.

[0046] 2.5 Add 2 g of ethanol to terminate the reaction, put the slurry in a vacuum drying oven to remove the solvent to obtain butyl rubber.

[0047] The butyl rubber obtained in embodiment 2 is carried out nuclear magnetic analysis, Mooney viscosity analysis, GPC...

Embodiment 3

[0049] 3.1 At -85°C, weigh 40g of isobutylene and add it to 110g of methylene chloride, then add 2g of isoprene and mix evenly to obtain a monomer solution.

[0050] 3.2 Weigh 0.02 g of aniline and add it into the monomer solution to obtain a reactant solution, and cool the solution down to -90°C.

[0051] 3.3 At -85°C, weigh 0.35g of 20% dichloroethylaluminum solution, add it into 12g of 0.02wt% HCl in methylene chloride solution and mix evenly to obtain a catalytic system, and age at -90°C for 30 minutes.

[0052] 3.4 Add the catalytic system to the reactant solution and react at -90°C for 20 minutes to obtain a uniformly dispersed slurry in the form of particles.

[0053] 3.5 Add 2 g of ethanol to terminate the reaction, put the slurry in a vacuum drying oven to remove the solvent to obtain butyl rubber.

[0054] The butyl rubber obtained in embodiment 3 is carried out nuclear magnetic analysis, Mooney viscosity analysis, GPC test, gained butyl rubber degree of unsaturatio...

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Abstract

The invention provides a butyl rubber production process, which comprises: S1) mixing monoolefine, diene, a nitrogen-containing organic compound and a reaction solvent to obtain a reactant solution; wherein a nitrogen-containing organic compound is selected from alkylamine and / or aromatic amine; mixing a main catalyst, a cocatalyst and a reaction solvent to obtain a catalytic system; wherein the main catalyst is Lewis acid; S2) aging the catalytic system at a low temperature, then mixing the aged catalytic system with a reactant solution, and carrying out a reaction to obtain product slurry; and S3) adding an alcohol compound into the product slurry to terminate the reaction, thereby obtaining the butyl rubber. Compared with the prior art, according to the invention, the nitrogen-containing organic compound is introduced as a slurry stabilizer in the polymerization process; due to the existence of a substance, the cationic active polymerization speed can be effectively reduced, the dispersion state of a product in a polymerization system is improved, the product is uniformly dispersed, the mass transfer and heat transfer of the polymerization system are effectively enhanced, the product quality is stable, the molecular weight distribution is widened, and the processability is excellent.

Description

technical field [0001] The invention belongs to the technical field of butyl rubber, in particular to a production process of butyl rubber. Background technique [0002] Butyl rubber is a kind of synthetic rubber, which is the product of cationic polymerization of isobutylene and isoprene at low temperature under the action of a catalyst. Butyl rubber has excellent air tightness and good heat resistance, aging resistance, acid and alkali resistance, ozone resistance, solvent resistance, electrical insulation, shock absorption and low water absorption, making it widely used in inner tubes, water tires, vulcanization Capsules, airtight layers, sidewalls, wires and cables, waterproof building materials, shock-absorbing materials, medicinal bottle stoppers, food (chewing gum base), rubber dams, anti-virus appliances, adhesives, inner tube valve cores, anti-corrosion products, docks Ship protection, bridge support pads and heat-resistant conveyor belts, etc. [0003] The produc...

Claims

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Application Information

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IPC IPC(8): C08F210/12C08F236/08C08F2/06
CPCC08F210/12C08F236/08C08F2/06
Inventor 李立霞刘振学王孝海葛良国栾波张杰卜立敏张晓岭韩飞荆帅林李芬芬谢晴
Owner 山东京博中聚新材料有限公司
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