METHOD OF PRODUCING MODIFIED POLYMERS FROM CONJUGATED DIENES, MODIFIED POLYMERS FROM CONJUGATED DIENES, RUBBER COMPOSITIONS AND COVERS Russian patent published in 2013 - IPC C08G77/442 C08C19/25 C08F8/42 C08L15/00 C08L83/08 B60C1/00 

FIELD: chemistry.

SUBSTANCE: disclosed is a method of producing a modified polymer based on a conjugated diene, involving a step (a) of conducting a reaction between a silicon compound and a conjugated diene-based polymer having an active group terminal group so that the reaction takes place on the terminal group, wherein the silicon compound in its molecule contains a protected primary amine group which is removed by hydrolysis to obtain a primary amine group, and a bifunctional silicon atom bonded to a hydrocarbyloxy group and a reactive group, which modifies the active terminal group, and a step (b) for carrying out a condensation reaction which involves participation of the compound which contains a bifunctional silicon atom in the presence of a titanium compound which is used as a titanium-based condensation accelerator. The reactive group at the silicon atom is a hydroxycarbyloxy group which contains 1-20 carbon atoms. Also disclosed is a modified polymer obtained using the disclosed method, a rubber composition containing said polymer and a pneumatic cover using the disclosed composition.

EFFECT: method enables to obtain a polymer which has excellent operational properties.

13 cl, 9 tbl, 30 ex