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Bromination method of butyl rubber

A butyl rubber and brominated technology, applied in the rubber field, can solve the problems of uncontrollable, unstable bromobutyl rubber product quality, and unstable water content of the glue.

Pending Publication Date: 2022-06-24
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

This just causes the glue solution that enters follow-up bromination process to remain by certain water, and prior art adopts screw to extrude and divide water tank to separate water, and this method causes the water content in the glue solution to be unstable and uncontrollable, resulting in butyl bromide Unstable quality of base rubber products

Method used

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  • Bromination method of butyl rubber
  • Bromination method of butyl rubber
  • Bromination method of butyl rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this example, Br 2 As a brominating agent, the butyl rubber is brominated, and a 2wt% NaOH solution is used as a neutralizing agent to obtain a brominated butyl rubber. Specific steps are as follows:

[0026] 1) Get device glue concentration 15wt% star-branched butyl rubber glue 1000g and place it in 5L reactor, wherein glue water content is 9.8wt%, add 10g 50% NaBr solution and stir for 2h and let stand for water separation, water separation amount It is 94.26g, and the water content after water separation is 1.5wt%.

[0027] 2) Add 2.2mlBr to the glue solution under the condition of shading at 40℃ 2 , and the reaction was stirred for 9 min to obtain a post-reaction glue.

[0028] 3) 230 g of 2% NaOH was added to the glue solution obtained in step 2) and neutralized for 5 min.

[0029] 4) Wash the glue solution obtained in step 3) with water, then add the corresponding stabilizer according to the mass ratio of butyl rubber: calcium stearate: epoxidized soybean o...

Embodiment 2

[0032] In this example, Br 2 As a brominating agent, the butyl rubber is brominated, and a 2wt% NaOH solution is used as a neutralizing agent to obtain a brominated butyl rubber. Specific steps are as follows:

[0033] 1) Get device glue concentration 15wt% star-branched butyl rubber glue 1000g and place it in 5L reactor, wherein glue water content is 9.8wt%, add 10g 50% NaCl solution and stir for 2h and let stand for water separation, the water separation amount is 80.54g, the water content after water separation is 2.85wt%.

[0034] 2) Add 2.2mlBr to the glue solution under the condition of shading at 40℃ 2 , and the reaction was stirred for 9 min to obtain a post-reaction glue.

[0035] 3) 230 g of 2% NaOH was added to the glue solution obtained in step 2) and neutralized for 5 min.

[0036] 4) Wash the glue solution obtained in step 3) with water, then add the corresponding stabilizer according to the mass ratio of butyl rubber: calcium stearate: epoxidized soybean oil...

Embodiment 3

[0039] In this example, Br 2 As a brominating agent, the butyl rubber is brominated, and a 2wt% NaOH solution is used as a neutralizing agent to obtain a brominated butyl rubber. Specific steps are as follows:

[0040] 1) Take 1000g of star-branched butyl rubber glue solution with a glue concentration of 15wt% of the device and place it in a 5L reaction kettle, wherein the glue solution has a water content of 9.8wt%, add 10g of 50% KBr solution and stir for 2h and let stand for water separation, and the water separation amount is 65.10g, the water content after water separation is 4.54wt%.

[0041] 2) Add 2.2mlBr to the glue solution under the condition of shading at 40℃ 2 , and the reaction was stirred for 9 min to obtain a post-reaction glue.

[0042] 3) 230 g of 2% NaOH was added to the glue solution obtained in step 2) and neutralized for 5 min.

[0043] 4) Wash the glue solution obtained in step 3) with water, then add the corresponding stabilizer according to the mas...

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Abstract

The invention provides a bromination method of butyl rubber, which comprises the following steps: adding inorganic salt into a branched butyl rubber solution with the water content of 9-10.5 wt%, and standing for water separation to obtain a rubber solution with the water content of 1-5wt%; the inorganic salt is selected from one or more of NaBr (sodium bromide), NaCl (sodium chloride), KBr (potassium bromide), KCl (potassium chloride), ZnBr2 (zinc bromide) and ZnCl2 (zinc chloride); introducing Br2 under a shading condition, and reacting to obtain a reacted glue solution; neutralizing and washing the reacted rubber solution to obtain butyl rubber; and mixing the butyl rubber with a stabilizer, removing the solvent, dehydrating and drying to obtain the brominated butyl rubber. According to the method, inorganic salt is introduced in the water separation stage, the water content in the rubber solution is controlled, and then the product quality of brominated butyl rubber is controlled.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to a bromination method of butyl rubber. Background technique [0002] 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 other properties, making it widely used in inner tubes, water tires, vulcanized bladders, air Dense layers, sidewalls, wires and cables, waterproof building materials, shock absorption materials, medicinal bottle stoppers, adhesives, inner tube valve cores, and heat-resistant conveyor belts. [0003] Butyl polymerization consists of slurry polymerization and solution polymerization. The advantage of slurry polymerization over solution polymerization is that polymer concentrations as high as 35-40 wt% in the reaction mixture can be achieved, resulting in an acceptable relatively low viscosity of the polymer mat...

Claims

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Application Information

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IPC IPC(8): C08F8/20C08F210/12
CPCC08F8/22C08F210/12
Inventor 李立霞谢晴荆帅林高建文王安迎栾波王耀伟任学斌王孝海
Owner 山东京博中聚新材料有限公司
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