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Butyl rubber solution and preparation method thereof

A butyl rubber and solution technology, applied in the rubber field, can solve the problems of low gel content, quality defects, difficult to prepare low primary structure content, etc., and achieve the effect of excellent performance

Active Publication Date: 2019-06-28
山东京博中聚新材料有限公司
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  • Claims
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AI Technical Summary

Problems solved by technology

In addition, during the flashing and stripping process, the concentration of unreacted monomers in the flash tank and stripping tower is very high, and the residual active catalyst can react with unreacted monomers to form oligomers at high temperature, and can also attack polymerization The unsaturated double bonds in the product form a gel; and too much oligomer and gel will have a negative impact on the physical properties of the product, for example, forming quality defects in the product, attaching to the surface of equipment and pipelines to block pipelines, reducing transmission thermal efficiency etc.
Therefore, the butyl rubber solution prepared by the above prior art is difficult to prepare halogenated butyl rubber products with low primary structure content, low gel content and suitable Mooney drop

Method used

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  • Butyl rubber solution and preparation method thereof
  • Butyl rubber solution and preparation method thereof

Examples

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preparation example Construction

[0047] The invention provides a kind of preparation method of butyl rubber solution, it is characterized in that, comprises the following steps:

[0048] a) contacting the polymer slurry with a solvent and a catalyst deactivator in a flash tank to obtain glue A;

[0049] b) sending the glue solution A into a stripping tower, and contacting the solvent vapor in reverse in the stripping tower to obtain glue solution B;

[0050] c) performing a water addition treatment, a dehydration treatment, a concentration adjustment treatment, a second water addition treatment and a heat exchange treatment on the glue B in sequence to obtain a butyl rubber solution;

[0051] The catalyst kill is a catalyst kill of the residual catalyst in the polymer slurry.

[0052] In the present invention, the polymer slurry is first contacted with the solvent and the catalyst deactivator in the flash tank, and the catalyst in the polymer sludge is deactivated by using the catalyst deactivator, and after...

Embodiment 1

[0124] 1.1 Adoption figure 1 The preparation device carries out the preparation of butyl rubber solution, specifically as follows:

[0125] With methyl chloride as the medium, AlEtCl 2 and HCl as catalyst (AlEtCl 2 : The mass ratio of HCl is 18:1), and isobutylene and isoprene are monomers (the mass ratio of isobutylene:isoprene is 100:3). AlEtCl 2 Dissolve in methyl chloride to obtain a catalyst solution with a concentration of 0.3 wt% and a flow rate of 0.6 kg / h. The concentration of the mixed material obtained by mixing the monomer and methyl chloride is 30 wt%, and the flow rate is 10 kg / h. The polymerization reaction was carried out in the polymerization reactor 10 (the polymerization temperature was -95° C.), and the monomer conversion rate was 90%.

[0126] The above-mentioned polymer slurry is sent to flash tank 1 (flow rate 10.6kg / h, temperature -93°C, pressure 2bar), and at the same time, hexane hot solvent and triethylene glycol deactivator are sent to flash ta...

Embodiment 2

[0137] Prepare the butyl rubber solution according to the preparation process of Example 1, the difference is that the catalyst deactivator added in the flash tank 1 is butanol, and the butanol content in the glue A is 500ppm; add the first high-speed mixer 3 The amount of water added is 4.0wt%, and water is added to the second mixer 6 until the water content of the glue is 0.6wt%. After the heat exchange treatment in the heat exchanger 7, the temperature of the glue is 45 ° C, and the final butyl rubber solution The concentration is 18.0wt%, the monomer content is 1.7ppm, the water content is 0.6wt%, and the temperature is 45°C.

[0138] According to the preparation process of Example 1, the obtained butyl rubber solution was used to prepare brominated butyl rubber.

[0139] The Mooney drop and primary structure content of the obtained bromobutyl rubber were tested according to the test method in Example 1. The results showed that the Mooney drop was 9.5%, the primary structu...

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Abstract

The invention provides a butyl rubber solution and a preparation method thereof. The preparation method comprises the following steps: (1) enabling polymer sludge to be in contact with a solvent and acatalyst deactivating agent into a flash evaporation kettle, so as to obtain a rubber solution A; (2) introducing the rubber solution A into a stripping tower to be reversely contact with solvent steam in the stripping tower, so as to obtain a rubber solution B; and (3) carrying out primary water supply treatment, dehydration treatment, secondary water supply treatment and heat exchange treatment, so as to obtain the butyl rubber solution, wherein the catalyst deactivating agent is a catalyst deactivating agent of the catalyst remained in the polymer sludge. The rubber solution prepared by virtue of the preparation method is proper and stable in concentration, low in monomer content, proper in water content and temperature and the like and is used for preparing halogenated butyl rubber, so that the halogenated butyl rubber product is low in gel content and primary structure content and proper in Mooney drop.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a butyl rubber solution and a preparation method thereof. Background technique [0002] At present, the industrial production of halogenated butyl rubber all adopts the solution method. Specifically, the base rubber butyl rubber is dissolved in a solvent to obtain a certain concentration of butyl rubber solution, and then reacted with halogen to obtain halogenated butyl rubber. Therefore, the acquisition of butyl rubber solution is crucial to the preparation of halogenated butyl rubber. Usually, the base rubber butyl rubber is prepared first, and then the product is processed to obtain the butyl rubber solution. [0003] Among them, the industrial production of base rubber butyl rubber is the most commonly used slurry method. Specifically, firstly, the monomer is dissolved in methyl chloride to obtain a mixed material, and the mixed material enters a polymerization reactor after ...

Claims

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Application Information

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IPC IPC(8): C08J3/09C08L23/22C08F210/12C08F236/08C08F8/22
Inventor 徐宏德任学斌王衍金崔红梅滕杰王孝海栾波
Owner 山东京博中聚新材料有限公司
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