Method for preparing rubber surface for adhesion to polymeric formulation
AssigneeSynair Corporation
InventorsEdward N. Gomberg, Ahmed A. Zurkiya
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Abstract
A heat stable bond between uncured urethane formulations and a rubber or synthetic rubber substrate is obtained by a method comprising coating the rubber surface with first a polyamine solution, then a peroxide solution and then a polyisocyanate-terminated monomer or prepolymer before applying the uncured urethane. While previously used bonds employing cyanoacrylate ester adhesives lose bond strength at elevated temperatures, the bond achieved in the present invention is stable throughout the operating temperature of the urethane.
Claims18
A method of preparing a surface of a rubber substrate for forming a temperature stable bond to polymeric formulations including the sequential steps of:
- applying a coat of a polyamine, Solution A, to a rubber substrate;
- applying a coat of a peroxide solution, Solution B;
- applying a coat of a polyisocyanate, Solution C, wherein the surface becomes isocyanate-rich;
- and
- applying a polymeric formulation whereafter the polymeric formulation is allowed to cure, thereby chemically bonding to the isocyanate-rich surface.
Dependencies are inferred from the claim text.