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Method for producing butadiene rubber bromide

A technology of brominated butyl rubber and a production method, which is applied in the production field of brominated butyl rubber, can solve the problems that the technical parameters of the preparation method are not specifically involved, the product quality is unstable, and the reaction process is not easy to control, etc., and the reaction process is easy , The effect of stable product quality

Inactive Publication Date: 2008-07-09
陈苏
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Problems solved by technology

[0002] The Chinese patent "Halogenated Butyl Rubber with Low Halogen Content", Patent No. 97117370.2, relates to a preparation method of halogenated butyl rubber. In this method, the formula of halogenated butyl rubber is disclosed, but the process in the whole preparation method parameters are not specifically related to
Especially in the process of halogenation reaction, the mass transfer and reaction process of halogen and rubber are mixed in this method. Since the Mooney viscosity of butyl rubber will drop significantly during the halogenation process, such a production method will make the product quality unstable. The reaction process is not easy to control

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  • Method for producing butadiene rubber bromide

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Embodiment Construction

[0016] Referring to Figure 1, first cut butyl rubber into small pieces of about 1 to 2 cm with a special glue cutter to facilitate the dissolution of butyl rubber, then add hexane solution into the reaction kettle, and put small pieces of Butyl rubber is dissolved. In order to ensure the smooth bromination of the glue, and considering the energy loss of post-processing, the concentration of butyl rubber in the hexane solution is controlled between 8% and 20%, and the temperature in the reactor is kept at 45°C to 65°C. between ℃.

[0017] Bromination reaction is the key technology of this process. Brominated butyl rubber (BIIR) is a product obtained after bromination of butyl rubber (IIR). Although the reaction is a free radical reaction, the reaction speed is still quite fast, and During the reaction process, bromine (Br) reacts with unsaturated isoprene to form the structure of bromobutyl rubber, which has a very important influence on the quality of rubber. This reaction r...

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Abstract

The invention discloses a process for preparing brominated butadiene rubber, which is characterized in that the process for preparation comprises first, dissolving butadiene rubber solution in dissolvent to form glue solution, second, stirring bromine and the glue solution to transfer with medium to become homogeneous solution, and then having a brominated reaction, third, entering nitrogen or air to remove hydrogen bromide in the glue solution after brominated reaction in a degassing tower, fourth, neutralizing the glue solution with dilute lye in a neutralizing reactor, and repeatedly washing with deionized water, leading the pH value of the glue solution to be 6.5-8.0, fifth, adding dispersing agent and heat-resisting agent to conciliate, sixth, flashing and recovering the dissolvent in the glue solution in a condensation pot to get brominated butadiene rubber gel particle, and getting the end products through squeezing, dewatering, expanding and drying. Compared with the prior art, the invention has the advantages that the invention can be continuously produced, the qualities of the products are stable, and the reaction process is easy to control (expand).

Description

technical field [0001] The invention discloses a synthesis method and technology of a polymer synthetic material, in particular to a production method of brominated butyl rubber. Bromobutyl rubber is mainly used in the manufacture of automotive tubeless tires and pharmaceutical bottle stoppers. Butyl rubber is the elastomer material with the best barrier airtightness known so far in the world. After butyl rubber is brominated, its vulcanization performance is greatly improved. Compared with other rubbers, such as styrene-butadiene rubber, butadiene rubber, etc. Both have good compatibility and co-vulcanization, so they are especially suitable for making inner liners of tubeless tires and medical bottle stoppers. Background technique [0002] The Chinese patent "Halogenated Butyl Rubber with Low Halogen Content", Patent No. 97117370.2, relates to a preparation method of halogenated butyl rubber. In this method, the formula of halogenated butyl rubber is disclosed, but the pr...

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Application Information

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IPC IPC(8): C08F8/22C08F210/10
Inventor 陈苏武冠英
Owner 陈苏
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