Adhesive composition for the direct joining of a pre-gelled polyester or vinyl ester to raw rubber

A process for preparing a sulfur-crosslinkable adhesive composition usable for bonding a polyester or vinyl ester composite to a diene elastomer, comprising the following steps:

• a) providing a p-VSBR elastomer latex;
• b) extracting the water from the latex;
• and
• c) incorporating into the elastomer a polyester or vinyl ester resin in solution in styrene.

A process for the production of laminated parts comprising at least one composite comprising reinforcement fibres embedded in a matrix based on a composition comprising a polyester or vinyl ester resin and at least one rubber firmly connected to said composite, said process comprising the following steps:

• A) providing a precomposite comprising reinforcement fibres embedded in the resin, the latter being prepolymerised;
• B) coating said precomposite with a layer of a ready-to-use adhesive composition;
• C) coating said composition with a layer of sulfur-vulcanisable rubber;
• and
• D) subjecting the stack comprising the precomposite, the adhesive composition and the rubber to final moulding under a pressure and at a temperature appropriate for continuing the polymerisation of the resin, the vulcanisation of the rubber, the crosslinking of the adhesive composition with the rubber and the polymerisation of the adhesive composition with the resin.