Patent ID: 9010393
Filing Date: 2015-04-21
Classification: C08K,C08L,Y10S,Y10T

Abstract:
1. A tire comprising a composition, based on at least one isoprene elastomer, an inorganic filler as reinforcing filler and an (inorganic filler/isoprene elastomer) coupling system which provides the bonding between the inorganic filler and the isoprene elastomer, wherein said coupling system comprises: as first coupling agent, a silane polysulfide compound (hereinafter “Compound I”) that corresponds to the formula (I): wherein: x is an integer from 2 to 8; Z Y wherein: the R the R as second coupling agent, an at least bifunctional organosilicon compound (hereinafter “Compound II”) which can be grafted, on the one hand, to the inorganic filler by means of a silyl functional group G and, on the other hand, to the elastomer by means of an azodicarbonyl functional group, the organosilicon compound having the formula: wherein: G is the silyl functional group bearing a hydroxyl or hydrolysable group attached to a silicon atom of the compound; Z is a divalent bonding group connecting the azodicarbonyl functional group to the silyl functional group; A represents a monovalent hydrocarbon group or the group of formula Z′-G′ wherein: A, Z and if applicable Z′, independently, may comprise a heteroatom.