Improving a pneumatic radial tire wear life by using specific low hysteresis compositions

摘要

Use is claimed of elastomeric mixtures, for internally filling the lower zones of pneumatic tires, based on natural rubber or synthetic polyisoprene with mostly cis-1,4 links; optionally another elastomeric diene, in the case of blending the natural rubber or synthetic polyisoprene making up the majority of the mixture; and a reinforcing filler. Use is claimed of elastomeric mixtures, for internally filling the lower zones of pneumatic tires, based on natural rubber or synthetic polyisoprene with mostly cis-1,4 links; optionally another elastomeric diene, in the case of cutting the natural rubber or synthetic polyisoprene making up the majority of the mixture; and a reinforcing filler comprising: i) white filler of the silica and/or alumina type with surface SiOH and/or AlOH functions selected from precipitated silica, silica ash, aluminas or aluminosilicates; or better carbon blacks modified during or after synthesis so as to cover at least part of the surface with SiOH and/or AlOH functions, with specific surface area = 30-260 m<2>g<-1> used in content of 15-40 pce; or ii) by a blend of carbon black with specific surface area = 30-160 m<2>g<-1> and a white filler as in i) in which the global filler content of 15-50 pce and the white filler content is greater than or equal to the carbon black content (in pce) - 5.