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Method for preparing butyl rubber

A technology of butyl rubber and isobutylene, applied in the field of preparation of butyl rubber, can solve the problems of slow vulcanization, poor compatibility, poor mutual adhesion, etc., and achieve the effects of reducing rigor, easy promotion, and reducing production costs

Active Publication Date: 2014-02-19
临沂星火知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But butyl rubber also has the following disadvantages: (1) slow vulcanization speed; (2) poor mutual adhesion; (3) poor compatibility; (4) weak interaction with reinforcing agents
[0005] At present, the polymerization temperature of the production process of butyl rubber is -100~-30°C. It can be seen that this temperature range is harsh for large-scale production conditions, which greatly increases the production cost and production difficulty.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method for butyl rubber, comprising the following steps:

[0021] (1) Preparation: The raw material is prepared from isobutene and isoprene, wherein the weight ratio of isobutene to isoprene is 10:1; the catalyst is prepared from p-trifluoromethylphenylboron and trialkylmono-titanocene made, wherein the weight ratio of trifluoromethylphenylboron to trialkylmono-titanocene is 3:1; the diluent is prepared from methylcyclohexane and propylcyclohexane, in which methylcyclohexane The weight ratio of alkane to propylcyclohexane is 2:1;

[0022] (2) Polymerization: Add the raw materials in step (1) into the polymerization tank, then add the catalyst and diluent in sequence, and finally carry out the polymerization reaction at -10°C and 1KPa for 2 hours;

[0023] (3) Termination: After the polymerization reaction, the terminator isopropanol is added, and the obtained polymer is flash-evaporated to remove unreacted monomers and solvents, and then dehydrated, extru...

Embodiment 2

[0027] A preparation method for butyl rubber, comprising the following steps:

[0028] (1) Preparation: The raw material is prepared from isobutene and isoprene, wherein the weight ratio of isobutene to isoprene is 16:1; the catalyst is prepared from p-trifluoromethylphenylboron and trialkylmono-titanocene The weight ratio of trifluoromethylphenylboron to trialkylmono-titanocene is 6.5:1; the diluent is prepared from methylcyclohexane and propylcyclohexane, in which methylcyclohexane The weight ratio of alkane to propylcyclohexane is 2.5:1;

[0029] (2) Polymerization: Add the raw materials in step (1) into the polymerization kettle, then add the catalyst and diluent in sequence, and finally carry out the polymerization reaction at -12°C and 10KPa for 3.5 hours;

[0030] (3) Termination: After the polymerization reaction, the terminator isopropanol is added, and the obtained polymer is flash-evaporated to remove unreacted monomers and solvents, and then dehydrated, extruded, ...

Embodiment 3

[0034] A preparation method for butyl rubber, comprising the following steps:

[0035] (1) Preparation: The raw material is prepared from isobutene and isoprene, wherein the weight ratio of isobutene to isoprene is 30:1; the catalyst is prepared from p-trifluoromethylphenylboron and trialkylmono-titanocene made, wherein the weight ratio of trifluoromethylphenylboron to trialkylmono-titanocene is 7:1; the diluent is prepared from methylcyclohexane and propylcyclohexane, in which methylcyclohexane The weight ratio of alkane to propyl cyclohexane is 3:1;

[0036] (2) Polymerization: Add the raw materials in step (1) into the polymerization tank, then add the catalyst and diluent in sequence, and finally carry out the polymerization reaction at -25°C and 14KPa for 4 hours;

[0037] (3) Termination: After the polymerization reaction, the terminator isopropanol is added, and the obtained polymer is flash-evaporated to remove unreacted monomers and solvents, and then dehydrated, ext...

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Abstract

The invention belongs to the technical field of rubber production, and particularly relates to a method for preparing butyl rubber. The method for preparing the butyl rubber comprises the following steps: (1) preparing, (2) polymerizing, and (3) terminating. Due to the adoption of the method, polymerization reaction can be performed in a less harsh temperature state, and the production cost and investment of high-class equipment are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of rubber production, in particular to a preparation method of butyl rubber. Background technique [0002] Butyl rubber has good chemical stability and thermal stability, the most prominent is air tightness and water tightness, its air permeability is only 1 / 7 of natural rubber, 1 / 5 of styrene-butadiene rubber, and The steam transmission rate is 1 / 200 of natural rubber and 1 / 140 of styrene-butadiene rubber, so it is mainly used to manufacture various rubber products such as inner tubes, steam pipes, water tires, dam bottoms and gaskets. [0003] Butyl rubber has the following advantages: (1) low air permeability and good air tightness: the side methyl groups in the molecular chain of styrene-butadiene rubber are densely arranged, which limits the thermal movement of polymer molecules; (2) good thermal stability: it can be used in Long-term use in the air at 100°C or slightly lower temperature, the service t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/12C08F4/643C08F2/42
Inventor 张成如刘霞
Owner 临沂星火知识产权服务有限公司
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