COMPOSICION DE CAUCHO A BASE DE NEGRO DE HUMO QUE TIENE SILICE FIJADA EN SU SUPERFICIE Y POLIMERO DIENICO FUNCIONALIZADO CON ALCOXISILANO

• Main Author: LABAUZE, GERARD
• Format: Patent
• Language: Spanish
• Published: 01.09.2003
• Edition: 4
• 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; 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

LA INVENCION SE REFIERE A UNA COMPOSICION DE CAUCHO QUE POSEE PROPIEDADES HISTERETICAS Y FISICAS MEJORADAS QUE LA HACEN ESPECIALMENTE ADECUADA PARA CONSTITUIR UNA BANDA DE RODAMIENTO DE UN NEUMATICO DE REDUCIDA RESISTENCIA AL RODAMIENTO. COMPRENDE NEGRO DE CARBONO CON SILICE FIJADA A SU SUPERFICIE COMO CARGA DE REFUERZO MAYORITARIA Y AL MENOS UN POLIMERO DIENICO FUNCIONALIZADO CON UN AGENTE DE FUNCIONALIZACION QUE OBEDEZCA A LA FORMULA GENERAL I: Vulcanisible rubber composition containing at least one functionalised dienic polymer and carbon black with silica fixed to its surface as reinforcing filler is claimed in which the polymer is functionalised by an agent with formula (Y)m-R -Si(OR )3-nR n in which Y = (I) or (II) ; R = 1-10C alkoyl, cycloalkoyl or aryl; R = 1-12C alkoyl, cycloalkoyl, aryl, alkylaryl or arylalkyl; R = 1-12C alkoyl, aryl, alkylaryl; R = 1-6C hydrocarbon with one or more oxygen atoms; n = 0 or 1; m = 1 or 2; and p, q = 0, 1, 3 or 4 so that p + q =2-5; polymer satisfying relationships PF = Ns divided by ÄNp x fn) ≥ 0.85 and PV = Ne divided by (Ns x m) ≥ 0.90 in which Ns = number of mol. of silicon, Np = number of mol. of functionalised polymer, fn = functionality of polymerisation initiator, and ne = number of mol. of epoxy functions linked to extremity of chain. Also claimed are pneumatic tyre and tread made from the composition.