Liquid adhesion promoter for cord-reinforced rubber and...

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/10 (2006.01) C08K 5/101 (2006.01) C08K 5/11 (2006.01) C08K 5/12 (2006.01) C08K 5/3492 (2006.01) C08L 21/00 (2006.01)

Patent

CA 2545392

A rubber composition including a natural or synthetic rubber, and an adhesive resin capable of unexpected adhesion to metal, polymer and glass substrates, particularly cords in radical tires, hoses, conveyor belts, transmission belts, and the like by the addition of a liquid composition containing long chain esters, including mono, di- and tri-esters, and one or more reactive diluents is disclosed. In the preferred embodiment, the reactive diluent is selected from (1) glycidyl ethers, (2) diglycidyl ethers; (3) aliphatic, straight chain epoxides; (4) epoxidized vegetable oils, particularly epoxidized soybean oil; (5) cycloaliphatic epoxies; (6) glycidyl esters, and (7) diglycidyl esters.

L'invention concerne une composition de caoutchouc comprenant un caoutchouc naturel ou synthétique, et une résine adhésive permettant une adhésion inattendue sur des substrats métalliques, polymères et vitreux, en particulier des cordes de pneumatiques, de tuyaux souples, de courroies de transport, de courroies de transmission, et analogues. Cette adhésion inattendue est rendue possible par l'ajout d'une composition liquide contenant des esters à chaîne longue, notamment des monoesters, des diesters et des triesters, et au moins un diluant réactif. Dans le mode de réalisation préféré de l'invention, le diluant réactif est sélectionné parmi: (1) des éthers de glycidyle, (2) des éthers de diglycidyle; (3) des époxydes aliphatiques à chaîne droite; (4) des huiles végétales époxydées, en particulier des huiles de soja époxydées; (5) des époxys cycloaliphatiques (6) des esters de glycidyle, et (7) des esters de diglycidyle.

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