MODIFIED POLYMER BASED ON CONJUGATED DIENE, METHOD OF ITS PRODUCTION AND RUBBER COMPOSITION CONTAINING IT Russian patent published in 2024 - IPC C08F236/04 C08F236/10 C08F236/14 C08F36/04 C08F36/14 C08F279/02 C08C19/22 C08C19/25 C08C19/44 C08K3/04 C08K3/36 

FIELD: chemistry.

SUBSTANCE: invention relates to a modified conjugated diene-based polymer, a method of its preparation, as well as a rubber composition comprising it. The modified conjugated diene polymer includes a first chain containing a repeating unit derived from a conjugated diene monomer; a second chain containing a repeat unit derived from the compound represented by Formula 1 in which R_1a-R_1c each independently represents a hydrogen atom and R_1d represents a single bond, or Formula 2 in which X₁-X₂ represents either CH₂-CH₂ or CH=CH, and X₃-X₄ represents either CH₂-CH₂, CH=N or N=N; and a unit derived from an alkoxysilane based modifier. The first chain and the second chain are connected by a link obtained from a modifier.

EFFECT: resulting polymer has excellent processability and good tensile strength and viscoelastic properties.

11 cl, 5 tbl, 3 ex