HEAVY GOODS VEHICLE TIRE COMPRISING A TREAD BASED ON A MODIFIED POLYISOPRENE, PROCESS FOR PREPARING SAME

摘要

A heavy-duty vehicle tire comprising a tread consisting of a crosslinked rubber composition comprising a reinforcing filler of siliceous type and a synthetic polyisoprene modified by grafting with a compound comprising at least one group Q, and at least one group A, which are joined to one another by at least one and preferably one “spacer” group Sp, in which:
Q comprises a dipole containing at least one and preferably one nitrogen atom,A comprises an associative group comprising at least one nitrogen atom,Sp is an atom or group of atoms forming a bond between Q and A.The heavy-duty vehicle tire according to the invention has a satisfactorily improved rolling resistance/wear resistance compromise.

主权项

1. A heavy-duty vehicle tire comprising a tread consisting of a crosslinked rubber composition, wherein the crosslinked rubber composition is based at least on the following components:
an elastomer matrix predominantly comprising a synthetic polyisoprene, a reinforcing filler predominantly comprising a reinforcing inorganic filler of siliceous type, and a reinforcing inorganic filler/functionalized diene elastomer bonding agent, a chemical crosslinker, and a modifier, optionally already grafted to the elastomer, selected from the compounds comprising at least one group Q, and at least one group A, which are joined to one another by at least one and preferably one “spacer” group Sp, wherein:
Q comprises a dipole containing at least one and preferably one nitrogen atom,A comprises an associative group comprising at least one nitrogen atom,Sp is an atom or group of atoms forming a bond between Q and A.