MODIFIED POLYMER BASED ON CONJUGATED DIENE, METHOD OF ITS PRODUCTION AND RUBBER COMPOSITION CONTAINING IT Russian patent published in 2024 - IPC C08F236/04 C08F36/04 C08F236/14 C08F230/08 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 repeating unit derived from the compound represented by Formula 1

wherein each of R_11a and R_11b independently represents a single bond or an unsubstituted alkylene group of 1–20 carbon atoms, R_11c represents an alkyl group of 1–20 carbon atoms, and each of R_11d-R_11g independently represents an alkyl group with 1–20 carbon atoms; an alkenyl group with 2–20 carbon atoms; an alkynyl group with 2–20 carbon atoms; or a cycloalkyl group with 5–20 carbon atoms, and a unit derived from an alkoxysilane-based modifier. The first and second chains are connected by a link obtained from the modifier.

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

13 cl, 5 tbl, 9 ex