Provided is a rubber composition which improves low heat build-up and wear resistance to or beyond known levels. The rubber composition contains a diene rubber and a reinforcing filler, and the diene rubber contains a styrene-butadiene copolymer component including at least one type of styrene-butadiene copolymer and satisfying the following requirements: (1) the bonded styrene content is from 5 to 50 wt.%; (2) among components obtained by ozone decomposition, the content of a decomposed component V1 containing one 1,2-bonded butadiene-derived unit out of the total of 100 mol% of decomposed components containing styrene-derived units and/or 1,2-bonded butadiene-derived units is less than 20 mol%; (3) among components obtained by ozone decomposition, the content of a decomposed component S2V1 containing two styrene-derived units and one 1,2-bonded butadiene-derived unit out of the total of 100 mol% of decomposed components containing styrene-derived units and/or 1,2-bonded butadiene-derived units is not less than 4 mol%; and (4) the vinyl content of a butadiene moiety is not less than 20% and less than 50%.
RUBBER COMPOSITION AND PNEUMATIC TIRE USING SAME
KAUTSCHUKZUSAMMENSETZUNG UND LUFTREIFEN MIT VERWENDUNG DAVON
COMPOSITION DE CAOUTCHOUC ET PNEUMATIQUE L'UTILISANT
2019-03-20
Patent
Electronic Resource
English
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |