METHOD FOR POLYMERIZATION OF CATIONICALLY POLYMERIZABLE MONOMERS Russian patent published in 2006 - IPC C08F210/12 C08F210/10 C08F10/10 C08F2/18 

FIELD: polymers, in particular method for production of random copolymers from one or more conjugated diene monomers, usable in rubber mixtures.

SUBSTANCE: target copolymers are obtained in continuous reactor for slurry polymerization. Method includes reaction in polar solvent of isoolefinic and diene monomers, Levis acid and initiator. Conjugated diene monomers are selected from group containing isoprene, butadiene, 2,3-dimethyl-1,3-butadiene, myrcene, 6,6-dimethylsulfene, hexadiene; piperilene. Initiator has general formula , wherein X represents halogen atom; R₁ represents C₁-C₈-alkyl and C₂-C₈-alkenyl; R₃ represents C₁-C₈-alkyl, C₂-C₈-alkenyl, and phenylalkyl; R₂ represents C₄-C₂₀₀-alkenyl, phenyl, phenylalkyl, alkylphenyl, C₃-C₁₀-cycloalkyl and group of formula , wherein X represents halogen atom; R₅ represents C₁-C₈-alkyl and C₂-C₈-alkenyl; R₆ represents C₁-C₈-alkyl, C₂-C₈-alkenyl, and phenylalkyl; R₄ represents phenylene, diphenyl, ω,ω-diphenylalkane and group of formula -(CH₂)_n-, wherein n = 1-10, integer number. R₁ R₂ and R₃ groups may also form adamantyl or bornyl rings, wherein X group in position of tertiary carbon atom. Reacted monomers in reactor form slurry in concentration of 20-50 % calculated as total mass of slurry, diluents, unreacted monomers and catalyst system.

EFFECT: improved heat transfer in reactor; production of copolymers at relatively high slurry concentration.

23 cl, 2 tbl, 5 ex, 6 dwg