Method. coating latex and reinforcing cord for forming a...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 5/06 (2006.01) C08K 9/08 (2006.01) C08L 23/16 (2006.01)

Patent

CA 2642203

A method for forming rubber articles, containing reinforcing strands, by extrusion or moulding, involves coating the reinforcing strands with a coating latex and drying the latex such that it remains uncured until the article containing the coated reinforcing strands is moulded or extruded. Improved adhesion between rubber matrix and reinforcing strands is obtained, particularly for filled rubber and EPDM rubber. Preferred coating latices and coated reinforcing cords for use with the method are also disclosed, the coating comprising a metal oxide, a maleimide crosslinking agent, a nitroso- compound, and halogenated rubber.

L'invention concerne un procédé de formation d'articles en caoutchouc, contenant des fils renforçants, par extrusion ou moulage, comprenant le revêtement des fils renforçants avec un latex de revêtement et le séchage du latex de manière à ce qu'il reste non vulcanisé jusqu'à ce que l'article contenant les fils renforçants enduits soit moulé ou extrudé. L'adhésion entre la matrice en caoutchouc et les fils renforçants est améliorée, notamment pour le caoutchouc chargé et le caoutchouc EPDM. L'invention concerne également des structures de revêtement préférées et des cordons renforçants enduits destinés à une utilisation avec le procédé, le revêtement comprenant un oxyde métallique, un agent de réticulation à base de maléimide, un composé nitroso et un caoutchouc halogéné.

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