Tape employing an adhesive comprising an epoxy resin and a polymer having carboxylic groups

Claim 1

A NORMALLY TACKY AND PRESSURE-SENSITIVE ADHESIVE TAPE COMPRISING A FLEXIBLE BACKING HAVING COATED ON AT LEAST ONE MAJOR SURFACE A NORMALLY TACKY AND PRESSURESENSITIVE ADHESIVE COMPOSITION CONSISTING ESSENTIALLY OF: (1) A LIQUID EPOXY RESIN FORMED BY THE REACTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A OLYHYDRIC ALCOHOL AND A POLYHYDRIC PHENOL WITH A HALOHYDRIN, AND (2) ELASTOMERIC COMPONENTS CONSISTING OF: (A) A WATER-INSOLUBLE SOLID ELASTOMERIC POLYMER HAVING CARBOXYLIC GROUPS CAPABLE OF REACTING WITH SAID LIQUID EPOXY RESIN, SAID ELASTOMERIC POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF CARBOXYLIC MODIFIED DIENE HOMOPOLYMER ELASTOMERS AND CARBOXYLIC MODIFIED DIENE COPOLYMER ELASTOMERS WHEREIN A DIENE MONOMER IS THE PRINCIPAL COMPONENT, AND (B) A MODIFYING ELASTOMER SELECTED FROM THE GROUP CONSISTING OF DIENE HOMOPOLYMER ELASTOMERS AND DIENE COPOLYMER ELASTOMERS WHEREIN A DIENE MONOMER IS THE PRINCIPAL COMPONENT, SAID MODIFYING ELESTOMER BEING IN AN AMOUNT OF FROM 0 TO 90% BY WEIGHT OF THE TOTAL ELASTOMERIC COMPONENTS, THE LIQUID EPOXY RESIN BEING IN AN AMOUNT FROM ABOUT 5 TO 125 PARTS PER 100 PARTS OF TOTAL ELASTOMERIC COMPONENTS WITH THE EPOXY RESIN BEING IN AN AMOUNT UP TO 20 PARTS WHEN THE ELASTOMERIC POLYMER IS OTHER THAN A DIENE-NITRILE COPOLYMER, AND THE ADHESIVE COMPOSITION INCLUDING A TACKIFYING COMPONENT WHICH IS AN AGENT SELECTED FROM THE GROUP CONSISTING OF (1) THE AFOREMENTIONED LIQUID EPOXY RESIN IN RESIN BEING IN AN AMOUNT UP TO 20 PARTS WHEN THE ELASELASTOMERIC COMPONENTS AND USED AS THE TACKIFIER FOR AN ELASTOMERIC POLYMER OF THE DIENE-NITRILE TYPE AND (2) A COMBINATION OF THE AFOREMENTIONED LIQUID EPOXY RESIN IN AN AMOUNT OF AT LEAST 5 PARTS PER 100 PARTS OF TOTAL ELASTOMERIC COMPONENTS AND A TACKFYING RESIN COMPATIBLE WITH THE ELASTOMERIC POLYMER IN AN AMOUNT FROM ABOUT 5 TO 250 PARTS PER 100 PARTS OF TOTAL ELASTOMERIC COMPONENTS.