BUTYL RUBBER HALOGENATION METHOD Russian patent published in 2012 - IPC C08F210/12 C08C19/14 C08C19/18 C08F8/18 C08F8/20 C08F8/22 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of halogenating butyl rubber. The method involves mixing starting butyl rubber and a halogenating agent which is deposited on a solid support with a developed adsorptive surface capable of reversible sorption of halogen. Mixing is carried out in the presence of a nitrogen-containing organic compound of general formula: (X = O, S, NH; R¹, R², R³, R⁴ = H, Alk, Ar; Alk = CH₃, C₂H_S, n-C₃H₇, iso-C₃H₇, n-C₄H₉, iso-C₄H₉, di-C₄H₉, tert-C₄H₉, C₅H₁₁, iso-C₅H₁₁, C₆H₁₃, iso-C₆H₁₃, C₇H₁₅, iso-C₇H₁₅, C₈H₁₇, iso-C₈H₁₇, C₉H₁₉, iso-C₉H₁₉, C₁₀H₂₁, (iso-C₁₀H₂₁, cyclopentyl, cyclohexyl and other aliphatic and alicyclic substitutes; Ar = C₆H₅, C₆H₅-CH₂, C₆H₄-CH₃-o, C₆H₄-CH₃-m, C₆H₄-CH₃-n and other aromatic substitutes).

EFFECT: high content of halogen in the end product in exo-halogenated form of isoprenyl links owing to elimination of secondary dehydrohalogenation and isomerisation reactions, as well as high molecular weight of the product owing to elimination of secondary decomposition reactions.

5 cl, 2 tbl, 3 dwg, 7 ex