RUBBER COMPOSITION AND TIRE HAVING TREAD FOR LOW TEMPERATURE PERFORMANCE AND WET TRACTION

• Main Author: BRACE, Lauren Elizabeth
• Format: Patent
• Language: English; French; German
• Published: 15.12.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

A rubber composition is disclosed comprising, based on parts by weight per 100 parts by weight elastomer (phr): (A) 100 parts by weight of a combination of conjugated diene-based elastomers comprising: (1) from 10 to 50 phr of an organic solvent polymerization prepared styrene/butadiene elastomer having a Tg in a range of from -40°C to -30°C with a styrene content in a range of from 30 to 35 percent wherein said Tg S-SBR is extended with from 10 to 38 parts by weight per 100 parts of said styrene/butadiene elastomer of triglyceride vegetable oil; (2) from 10 to 50 phr of aqueous emulsion polymerization prepared styrene/butadiene elastomer having a Tg in a range of from -65°C to -45°C with a styrene content in a range of from 15 to 30 percent; and (3) from 20 to 60 phr of cis 1,4-polybutadiene rubber having a cis 1,4-isomeric content of at least 95 percent and having a Tg in a range of from -100°C to -108°C; (B) from 50 to 250 phr of a filler comprising silica and carbon black; and (C) from 5 to 45 phr of a resin comprising at least one of terpene, coumarone indene and styrene-alphamethylstyrene resins having a softening point within a range of from 60°C to 150°C. The rubber composition may be used in a tread of a pneumatic tire.