MODIFIED POLYMER BASED ON CONJUGATED DIENE AND RUBBER COMPOSITION CONTAINING SAME Russian patent published in 2025 - IPC C08F236/10 C08F8/32 C08F8/42 C08L9/06 

FIELD: chemistry.

SUBSTANCE: present invention relates to chemistry of high-molecular compounds, specifically to modified polymers based on a conjugated diene. Modified polymer based on conjugated diene includes a first polymer chain and a second polymer chain, where each includes a repeating unit obtained from a conjugated diene-based monomer, aromatic vinyl, and a residue obtained from a nitrogen-containing modification initiator. Modified polymer has a weight average molecular weight of 1,000,000 g/mol to 3,000,000 g/mol and a Mooney stress relaxation coefficient (-S/R) measured at 100 °C equal to 0.40 or less. First polymer chain contains, at least at one end, a residue obtained from a modifier based on aminoalkoxysilane, the second polymer chain contains, at least at one end, a residue obtained from a modifier based on an amino epoxy compound. Modifier based on aminoalkoxysilane includes 6 or more alkoxy groups in the molecule.

EFFECT: disclosed invention increases abrasion resistance and processability when used in rubber compositions.

6 cl, 3 tbl, 8 ex