POLYMER BLEND AND METHOD FOR PRODUCING POLYMER BLEND, AND RUBBER COMPOSITION AND PNEUMATIC TIRE EACH USING POLYMER BLEND

To provide a polymer blend which can allow for production of a tire tread excellent in wear resistance, and brake performance and long-term characteristics thereof, and a method for producing the polymer blend, as well as a rubber composition and a pneumatic tire each using the polymer blend.A polym...

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Bibliographische Detailangaben
Hauptverfasser:	YASUMOTO, Atsushi, KIKUCHI, Akitomo
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
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Beschreibung
Zusammenfassung:	To provide a polymer blend which can allow for production of a tire tread excellent in wear resistance, and brake performance and long-term characteristics thereof, and a method for producing the polymer blend, as well as a rubber composition and a pneumatic tire each using the polymer blend.A polymer blend containing a first polymer and a second polymer, wherein the first polymer is a random copolymer having an aromatic vinyl compound-derived constituent unit, a conjugated diene compound-derived constituent unit, and an ethylene-derived constituent unit, the second polymer is a non-hydrogenated random copolymer having an aromatic vinyl compound-derived constituent unit and a conjugated diene compound-derived constituent unit, and a value obtained by subtracting an SP value of the second polymer from an SP value of the first polymer is 0 or more and 0.6 or less.