TREAD RUBBER COMPOSITION FOR STUDLESS WINTER TIRES

• Main Authors: YOSHIOKA, Mikako, YOKOYAMA, Yuka, SAWAKI, Haruko
• Format: Patent
• Language: English; French; German
• Published: 12.05.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS RELATED TO TYRES; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; VEHICLE TYRES; VEHICLES IN GENERAL

The present invention provides a rubber composition for studless winter tires that provides a balanced improvement of performance on ice and abrasion resistance, regardless of temperature, and a studless winter tire including the rubber composition. The present invention relates to a tread rubber composition for studless winter tires, containing: a rubber component including an isoprene-based rubber and a modified conjugated diene polymer; a water-soluble fine particle; silica; and a liquid plasticizer, the silica being present in an amount of 30 parts by mass or more, the liquid plasticizer being present in an amount of more than 30 parts by mass, each per 100 parts by mass of the rubber component.