A method of adhering cured rubber to uncured or cured...

Details A method of adhering cured rubber to uncured or cured... A method of adhering cured rubber to uncured or cured...

C - Chemistry, Metallurgy

08

G

C08G 18/80 (2006.01) B29D 30/00 (2006.01) B60C 7/10 (2006.01) C08G 18/10 (2006.01)

Patent

CA 2076215

Abstract of the Disclosure A METHOD OF ADHERING CURED RUBBER TO UNCURED OR CURED URETHANE AND THE RESULTING PRODUCT A method of adhering a cured rubber, especially a polyurethane to a cured or uncured urethane by providing said cured rubber with unreacted hydroxyl as from an excess of monol or preferably a polyol blended therein. Then this cured rubber containing free or unreacted hydroxyl material is treated with a blocked diisocyanate type urethane or a mixture of said blocked diisocyanate urethane and a thermoplastic urethane having an excess hydroxyl containing material and curing at a temperature of 300° - 450°F for several hours, usually 4 to 24 hours to cause the blocked isocyanate to unblock and the free isocyanate group to react with the excess polyol.

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