METHOD FOR PRODUCING HALOBUTYL IONOMERS Russian patent published in 2016 - IPC C08F210/12 C08F8/32 C08C19/32 C08C19/24 C08F2/06 C08F8/22 C08F8/44 C08F8/40 C08C19/22 

FIELD: chemistry.

SUBSTANCE: invention relates to energy-efficient and environmentally friendly process for the preparation of butyl ionomer. A process for the preparation of ionomers comprising at least the steps of: a) providing a reaction medium comprising a common aliphatic medium comprising at least 50 wt-% of one or more aliphatic hydrocarbons having a boiling point in the range of 45 °C to 80 °C at a pressure of 1,013 hPa, and β a monomer mixture comprising at least one monoolefin monomer, at least one multiofefin monomer and either no or at least one other co-polymerizable monomer in a mass ratio of monomer mixture to common aliphatic medium of from 40:60 to 99:1 ; b) polymerizing the monomer mixture within the reaction medium to form a rubber solution comprising a rubber polymer which is at least substantially dissolved in the medium comprising the common aliphatic medium and residual monomers of the monomer mixture; c) separating residual monomers of the monomer mixture from the rubber solution to form a separated rubber solution comprising the rubber polymer and the common aliphatic medium, d) brominating the rubber polymer in the separated rubber solution to obtain a solution comprising the brominated rubber polymer and the common aliphatic medium, e) reacting the brominated rubber polymer obtained in step d) with at least one nitrogen and/or phosphorous containing nucleophile. Also described is the use of ionomera prepared by the above method.

EFFECT: technical result - an energy efficient and environmentally friendly process for producing butyl ionomers using a common medium for the solution polymerization and subsequent bromination of butyl rubber.

17 cl, 1 dwg, 4 ex