METHOD OF SYNTHESIS OF DIENE (CO)POLYMERS WITH INCREASED CONTENT OF 1,2-LINKS Russian patent published in 2001 - IPC

FIELD: organic chemistry, chemical technology, rubber industry. SUBSTANCE: invention relates to the field of rubber production for making tires with enhanced explorational indices. (Co)polymerization of the corresponding monomers is carried out in medium of hydrocarbon solvent in the presence of catalytic complex prepared by interaction of ethyl chloride with lithium dispersion taken in the molecular ratio = 1:(2.05-2.10) at 50-60 C followed by addition of the following monomers: ethylene, butadiene, isoprene, piperylene, styrene or mixture of butadiene and styrene taken in the mole ratio = (0.25-1.00): 1; sodium alkoxide as a product of interaction of N',N',N', N'-tetra-(β-hydroxypropyl)-ethylenediamine with sodium dispersion in the mole ratio = 1:(4.05-4.10) at 98-100 C; triethylenehexamethyltetramine or tetraethyleneheptamethylpentamine as a polar modifying agent taken in the mole ratio active lithium:sodium:indicated modifying agent = 1:(0.3-1.0):(0.3-1.0), respectively, in the dose 0.2-2.0 x 10^-3 mole of active sodium per 100 g of polymerizing monomers. Before feeding the indicated complex dimethylamine or diethylamine taken in the mole ratio active lithium:indicated alkylamine = 1:(0.5-1.0) can be added. After termination of (co)polymerization reaction tetraethoxysilane or silicon tetrachloride is added as a coupling agent taken in the mole ratio active lithium:indicated coupling agent = 1: (0.18-0.25). EFFECT: improved method of synthesis. 2 cl, 6 tbl, 22 ex