Method of bonding a rubbery composition to a reinforcing element

Claim 1

A PROCESS FOR TREATING A REINFORCING ELEMENT OF A POLYESTER RESIN TO IMPROVE ITS ABILITY TO ADHERE TO A RUBBERY COMPOSITION WHICH COMPRISES TREATING THE REINFORCING ELEMENT WITH AN ADHESIVE COMPOSITION COMPRISING A DISPERSION OF APOLYEPOXIDE, THE COMPONENTS OF A HEATCONVERTIBLE PHENOL/ALDEHYDE RESIN, AND A DIENE RUBBER LATEX TO DEPOSIT ON SAID ELEMENT FROM ABOUT .5 TO ABOUT 10% SOLIDS OF SAID POLYEPOXIDE, AND FROM ABOUT 1% TO ABOUT 20% SOLIDS OF SAID RESIN AND RUBBER LATEX WHEREIN THE RATION OF RESIN TO RUBBER LATEX RANGES FROM 1/10 TO 2.5/10, HEATING THE ADHESIVE COMPOSITION AT A TEMPERATURE INSUFFICIENT TO CAUSE A SUBSTANTIAL REACTION OF THE COMPONENTS OF SAID ADHESIVE COMPOSITION BUT AT A TEMPERATURE SUFFICIENT TO SOLIDIFY THE ADHESIVE COMPOSITION, THE COMPONENTS REMAINING SUBSTANTIALLY UNREACTED BECAUSE OF THE ABSENCE OF AN EPOXY CURING AGENT, APPLYING A SECOND ADHESIVE COMPOSITION CONTAINING COMPONENTS INCLUDING A HEAT-CONVERTIBLE ALDEHYDE RESIN AND A RUBBER LATEX CHEMICALLY REACTIVE WITH THE CHEMICALLY REACTIVE COMPONENTS OF THE SAID FIRST ADHESIVE COMPOSITION TO THE REINFORCING ELEMENT AND THEN HEATING THE REINFORCING ELEMENT AT A TEMPERATURE FROM ABOUT 350*F. TO ABOUT 410*F. FOR FROM ABOUT 2 TO ABOUT 5 MINUTES IN ORDER TO CONVERT THE COMPONENTS OF BOTH ADHESIVE COMPOSITIONS INTO A HOMOGENEOUS RESINOUS MASS.