Impregnated reinforcing element bonded to an oxide coating on a copper foil

Claim 1

A LAMINATE CONSISTING ESSENTIALLY OF A REINFORCING ELEMENT IMPREGNATED WITH A RESINFIABLE MIX PARTIALLY POLYMERIZED TO A B-STAGE AND BONDED TO THE SURFACE OF A BLACK COPPER OXIDE SURFACED COPPER FOIL, SAID RESINIFIABLE MIX CONTAINING A CONJUGATED C4-C6 DIOLEFIN POLYMERIC OIL, AN ORGANIC PEROXIDE CATALYST, AND A CROSSLINKING AGENT SELECTED FROM THE GROUP CONSISTING OF STYRENE, VINYL TOLUENES, DIVINYL BENZENE, DIMETHYL STYRENES, HALOGENATED STYRENES, ACRYLIC AND METHACRYLIC ACID ESTERS OF MONOHYDRIC ALCOHOLS, ALKYL FUMARATES, DIALLYL PHTHALATE, VINYL STEARATE AND MIXTURES THEREOF AND SAID LAMINATE FORMED BY SUBJECTING THE SAID IMPREGNATED MIX TO A TEMPERATURE OF BETWEEN ABOUT 250* AND ABOUT 350*F. FOR BETWEEN ABOUT 1 AND ABOUT 120 MINUTES TO FORM A B-STAGE POLYMER WHICH IS SOFT GEL AND IS SUBSTANTIALLY INSOLUBLE IN HYDROCARBON SOLVENTS, SAID PARTIAL POLYMERIZATION BEING CARRIED OUT WHILE BONDING A SURFACE OF SAID RESINFIABLE MIX IMPREGNATED REINFORCING ELEMENT WITH THE SURFACE OF A BLACK COPPER OXIDE SURFACED COPPER FOIL.