METHOD OF OBTAINING BROMINATED BUTYL RUBBER Russian patent published in 2017 - IPC C08F8/22 C08C19/14 

FIELD: chemistry.

SUBSTANCE: invention discloses a process for the preparation of adhesives containing an aliphatic medium and at least one brominated butyl rubber comprising at least the following steps: a) the preparation of an butyl rubber adhesive containing butyl rubber, water and an aliphatic medium, b) bromination of butyl rubber or butyl rubbers Contained in the butyl rubber adhesive obtained in step a) with elemental bromine in the presence of an added aqueous oxidizing reagent in which the aqueous oxidizing reagent is a water Th hydrogen peroxide solution containing from 25 to 60 wt % of hydrogen peroxide, and wherein step b) is carried out continuously, c) adjusting the pH of the aqueous phase with a base, d1) separating the glue containing the aliphatic medium and the brominated butyl rubber from the aqueous Phase, or d2) separating the heterophasic mixture obtained in step b) to produce an adhesive containing an aliphatic medium and brominated butyl rubber and an aqueous phase, and d3) washing the glue containing the aliphatic medium and the brominated butyl rubber with an aqueous mixture, preferably an aqueous solution of the base. Also, the use of brominated or vulcanized brominated rubbers as inner shells tire treads, sidewalls, adhesives, mixtures with thermoplastic elastomers in footwear, membranes for storage, protective clothing, pharmaceutical stoppers, gaskets, and protective coatings in the pharmaceutical industry or in the process for their preparation is disclosed.

EFFECT: invention relates to an efficient, environmentally friendly process for producing brominated butyl rubbers, wherein the brominating reagent is used and the oxidizing agent to increase the degree of use of the bromine contained in brominating reagent.

23 cl, 4 ex, 3 tbl