1987 particularly pp 297 u2212 300 which are incorporated herein by reference after completion of the bromination reaction the polymer may be recovered by conventional methods e g neutralization with dilute caustic water washing and removal of solvent such as by steam stripping or precipitation using a lower alcohol such as isopropanol followed by drying processing aids and antioxidants may be mixed with the brominated polymer product prior to or subsequent to stripping the solvent the brominated rubber may cured in a further step the curing of brominated rubbers is well known suitable curing systems for use with the present product are those already known in the art for use with brominated rubbers in particular bromobutyl rubbers and generally include conventional curing systems such as sulphur resin and peroxide curing systems the brominated rubbers and cured brominated rubbers obtainable using the process according to the invention may be used as a part of a tire including but not limited to an inner liner tread sidewall an adhesive as part of a thermoplastic elastomer footwear storage membranes protective clothing pharmaceutical stoppers linings and barrier coatings key elements of the process described in fig1 have been operated at pilot scale with reactors of 2 litre total capacity running in a continuous mode feeds to the reactors were 3 87 kg h of isobutene 0 09 kg h of isoprene and 2 0 kg h of hexane giving a monomer hexane mass ratio of 66 34 the reaction temperature used was u2212 65 u00b0 c and a solution having a solids content of 16.