Patent ID: 8623169

Claim:
A process for adhering a cured polyurethane to an uncured diene elastomer composition, characterised in that it comprises the following steps: applying an adhesive composition, as adhesion primer, onto the prepolymerised polyurethane, wherein said adhesive composition comprises a polyisocyanate compound and a polyester or vinyl ester resin comprising functional groups which are reactive towards the isocyanate groups of said polyisocyanate compound, the total number of these isocyanate groups being in excess relative to the total number of said functional groups of the polyester or vinyl ester resin; polymerising together the adhesion primer and the polyurethane thus covered with its primer; then applying onto the thus pre-adherised polyurethane the secondary adhesion layer for diene elastomer capable of bonding to the vinyl ester or polyester resin of the adhesion primer; bringing the uncured diene elastomer composition into contact with the polyurethane thus adherised; and curing the assembly.