Problem to be SolvedThe present invention provides a conjugated diene-based polymer composition excellent in rolling resistance, grip performance on a wet road surface, and abrasion resistance when formed into a tire.SolutionA conjugated diene-based polymer composition containing:10 to 90 parts by mass of a conjugated diene-based polymer (A) having a glass transition temperature of −20° C. or more; and10 to 90 parts by mass of a conjugated diene-based polymer (B) having a glass transition temperature of −25° C. or less,wherein the conjugated diene-based polymer (A) has an absolute molecular weight, measured by viscosity detector-equipped GPC-light scattering measurement, of 40×104 or more and 5000×104 or less, and a branch number (Bn), measured by the viscosity detector-equipped GPC-light scattering measurement, of 8 or more.
CONJUGATED DIENE-BASED POLYMER COMPOSITION AND TIRE
2021-09-16
Patent
Electronic Resource
English
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