PNEUMATIC TIRE

摘要

The present invention is directed to a pneumatic tire having a circumferentially extending equatorial plane of the tire, the tire comprising a carcass, a tread radially outward of the carcass, the carcass comprising a carcass reinforcing ply, opposing bead portions, and opposing sidewalls, the carcass reinforcing ply having a main portion extending between the opposing bead portions and a pair of turnup portions, each turnup portion extending from one end of the main portion, the carcass ply further comprising reinforcing cords and a plycoat; each bead portion having a bead core and a bead apex, each apex being in contact with the plycoat; the plycoat comprising a vulcanizable plycoat rubber composition comprising a first methylene acceptor; the apex comprising a vulcanizable apex rubber composition comprising a second methylene acceptor and a methylene donor, wherein the amount of methylene donor is in stoichiometric excess relative to the second methylene acceptor.

主权项

1. A pneumatic tire having a circumferentially extending equatorial plane of the tire, the tire comprising a carcass, a tread radially outward of the carcass, the carcass comprising a carcass reinforcing ply, opposing bead portions, and opposing sidewalls, the carcass reinforcing ply having a main portion extending between the opposing bead portions and a pair of turnup portions, each turnup portion extending from one end of the main portion, the carcass ply further comprising reinforcing cords and a plycoat; each bead portion having a bead core and a bead apex, each apex being in contact with the plycoat;
the plycoat comprising a vulcanizable plycoat rubber composition comprising a first methylene acceptor; the apex comprising a vulcanizable apex rubber composition comprising a second methylene acceptor and a methylene donor, wherein the amount of methylene donor is in stoichiometric excess relative to the second methylene acceptor.