Pressure-sensitive tapes and method for manufacturing same

Claim 1

A PRESSURE-SENSITIVE ADHESIVE TAPE COMPRISING A BACKING FORMED OF A RESINOUS FILM-FORMING MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE, POLYTETRAFLUORETHYLENE, POLYETHYLENE TEREPHITHALATE, AND POLYETHYLENE DERIVATIVES, A PRESSURE-SENSITIVE ADHESIVE COATING ON THE FILM HAVING AN ORGANOSILICON POLYMER RESINOUS BASE, AND AN INTERMEDIATE COAT FOR ANCHORING THE PRESSURESENSITIVE ADHESIVE COATING TO THE FILM, COMPRISING AN ELASTOMER SELECTED FROM THE GROUP CONSISTING OF A BUTADIENEACRYLONITRILE COPOLYMER AND A BUTAEDIENE-ACRYLONITRILE COPOLYMER-BUTADIENE-STYRENE COPOLYMERWHEREIN, WHEN BOTH THE BUTADIENE-ACRYLONITRILE COPOLYMER AND THE BUTADIENESTYRENE COPOLYMER ARE PRESENT, THE MATERIALS ARE PRESENT IN THE RATIO OF 1 PART BY WEIGHT BUTADIENE-STYRENE COPOLYMER TO 0.2-0.5 PART BY WEIGHTBUTADIENE-STYRENE COPOLYMER, AN ORGANOSILICON RESINOUS POLYMER PRESENT IN AMOUNTS RANGING FROM 1 PART BY WEIGHT ELASTOMER TO 0.5-2.0 PARTS BY WEIGHT OF THE ORGANOSILICON POLYMER RESIN, AND A COAL TAR RESIN SELECTED FROM THE GROUP CONSISTING OF COUMARONE-INDENE, COUMARONE INDENE-POLYTERPENE, AND COUMARONE INDENE-POLYTERPENE DERIVATIVE RESINS WHEREIN WHERE THE COUMARONE-INDENE IS PRESENT WITH A POLYTERPENE THE FORMER IS PRESENT IN SUBSTANTIALLY GREATER AMOUNTS AND IN WHICH THE COAL TAR RESINS ARE PRESENT IN THE RATIO OF 1 PART BY WEIGHT ELASTOMER TO 0.2-1.0 PART BY WEIGHT OF THE COAL TAR RESIN.