Reinforcing filler for rubber

• Main Authors: BERNAL PAREDES MA PILAR, JULVE SEBASTIAN DANIEL JAVIER, MENEDEZ SASTRE MIGUEL, MARTINEZ FALCON MARIA, PEREZ CACHO JORGE, CORONAS CERESUELA JOAQUIN, RAMOS ESCRIBANO JOSE
• Format: Patent
• Language: English
• Published: 14.04.2015
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The present invention describes a reinforcing filler for rubber comprising the synergistic combination of precipitated silica with a pore structure defined by a maximum between 25 nm and 35 nm, a total pore volume between 1.3 cm3/g and 1.6 cm3/g, and a compression factor between 1.3 10−2 and 2.3 10−2 MPa−1, and at least one crystalline alkaline silicate corresponding to the general formula of the crystalline alkaline silicates, said crystalline alkaline silicate being swelled and/or layered in the presence of an organic cationic compound in the form of ammonium salt of the +NR4 type according to the formula [CnH2n+1N(CH3)3]+. The rubber formulation obtained by this reinforcing filler composition does present a great reduction of energy dissipated in the tread without compromising the abrasion resistance and elastic modulus properties.