A 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: (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
2020-06-02
Patent
Elektronische Ressource
Englisch
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08C TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS , Behandlung oder chemische Modifizierung von Kautschuken / C08F MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |