CROSS-LINKED PRODUCT AND TIRE

• Main Authors: ADACHI, Takumi, SAKAGAMI, Yuto, SANO, Takuya, FUKUMOTO, Takato, HAYAKAWA, Toshiyuki, KIKUCHI, Toshimitsu, SENGA, Hirofumi, KAIZU, Michitaka
• Format: Patent
• Language: English; French; German
• Published: 22.06.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS RELATED TO TYRES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS; TYRE CHANGING OR REPAIRING; TYRE INFLATION; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; VEHICLE TYRES; VEHICLES IN GENERAL

A cross-linked product is obtained through crosslinking of a polymer composition that contains a rubber component, an inorganic filler and a cross-linking agent and that satisfies conditions (a) to (d):(a) the polymer composition contains a conjugated diene-based polymer (A) having, when composition ratios (molar ratios) in the polymer of a structural unit represented by formulas (1) to (4) are p, q, r, and s, respectively, a value α represented by formula (i) of 0.80 or more and 0.97 or less; α=p+0.5×r/p+q+0.5×r+s(b) the conjugated diene-based polymer (A) has a blending ratio of 10% by mass or more relative to a total amount of the rubber component;(c) the inorganic filler has a blending ratio of 40 to 150 parts by mass relative to 100 parts by mass of the rubber component; and(d) Tg of the cross-linked product is -25°C or lower.