A polymer composition is provided that is suitable for manufacturing a tire that not only has excellent low-loss properties and wear resistance, but also has an excellent balance of wet grip performance and mechanical characteristics. A polymer composition according to the present invention is characterized by containing a diene polymer (A) and a filler (B), the diene polymer (A) containing the polymer (A1) and the polymer (A2) described below. Polymer (A1): A copolymer of a polymer of a conjugate diene compound or the conjugate diene compound, and an aromatic vinyl compound, the copolymer being modified with a polar group having affinity for the filler (B), wherein the aromatic vinyl content is 25 mass% or less, and the modification rate is 30-100%. Polymer (A2): A copolymer of an aromatic vinyl compound and a conjugate diene compound including 1,3-butadiene, wherein the aromatic content is 30-50 mass%, the vinyl content is 5-30 mass%, and the peak molecular weight of the polystyrene equivalent measured using gel permeation chromatography is 400,000 to 2,000,000.
POLYMER COMPOSITION, CROSSLINKED POLYMER, AND TIRE
POLYMERZUSAMMENSETZUNG, VERNETZTES POLYMER UND REIFEN
COMPOSITION POLYMÈRE, POLYMÈRE RÉTICULÉ ET PNEUMATIQUE
2023-04-19
Patent
Electronic Resource
English
IPC: | 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 / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen |