BUTYL RUBBER SYNTHESIS METHOD Russian patent published in 2011 - IPC C08F210/12 

FIELD: chemistry.

SUBSTANCE: invention pertains to a method of producing butyl rubber. The method involves preparation of a mixture from isobutylene, isoprene and returned products, copolymerisation of the mixture in a medium of a diluent - methyl chloride in several reactors working in parallel in the presence of an aluminium chloride catalyst, involving degassing the rubber, processing non-polymerised monomers and the diluent - methyl chloride, averaging, drying the ready polymer on extrusion-type machines and briquetting. The copolymerisation process is carried out in the presence of two catalyst modifiers, one of which is water and the second is selected from a group of organic substances with general formula C₆H₅-X, where X is halogen or a radical with formula -C_nH_2n+1-Hal, where n=1-2. Molar ratio AlCl₃: H₂O is kept in the range 1:0.5-20, and molar ratio AlCl₃: C₆H₅-X is kept in the range 1:50-350.

EFFECT: obtaining butyl rubber which is used in riding chambers and shaper-vulcaniser chambers.

2 cl, 21 ex, 1 tbl, 1 dwg