Pressure-sensitive adhesive tape and method of making

Claim 1

A SOLVENT-RESISTANT AND WEATHER-RESISTANT PRESSURESENSITIVE ADHESIVE TAPE COMPRISING A PRESSURE-SENSITIVE TAPE ADHESIVE LAYER FIRMLY ADHERENTLY BONDED TO A FIBROUS BACKING IMPREGNATED AND UNIFIED WITH THE HEAT-CURED POLYMERIC REACTION PRODUCTS OF A COMBINATION OF AN AMIDE-ESTER POLYMER AND A SMALL PROPORTION OF AN ALDEHYDIC CURING AGENT, SAID COMBINATION BEING CAPABLE OF PRODUCING A HEAT-CURED THIN FILM HAVING A MODULUS AT 100% ELONGATION OF ABOUT 30-160 LBS./SQ. IN. AND A TENSILE STRENGTH OF AT LEAST ABOUT 70 LBS./SQ. IN. AT AN ELONGATION OF AT LEAST ABOUT 300%, SAID AMIDE-ESTER POLYMER BEING A LOW-ACID-NUMBER CONDENSATION PRODUCT, SOLUBLE IN ISOPROPANOL-XYLOL AND HAVING A MOLECULAR WEIGHT OF ABOUT 1500-8000, FORMED BY SIMULTANEOUSLY HEATING TOGETHER INTER-REACTIVE COMPONENTS CONSISTING ESSENTIALLY OF SUBSTANTIALLY EQUIVALENT MOLAR QUANTITIES OF AN ORGANIC ACID PORTION AND AN AMINE-ALCOHOL PORTION; SAID ACID PORTION CONSISTING OF AT LEAST ABOUT 80% OF ALIPHATIC DICARBOXYLIC ACID HAVING AT LEAST FOUR CARBON ATOMS BETWEEN CARBOXYL GROUPS, ANY REMAINDER CONSISTING OF UNSATURATED DICARBOXYLIC ACID FROM THE CLASS CONSISTING OF MALEIC, FUMARIC, ITACONIC AND CITRACONIC ACIDS AND ADDUCTS OF MALEIC ANHYDRIDE WITH CONJUGATED DIENES; SAID AMINE-ALCOHOL PORTION CONSISTING OF COMPONENTS TOTALING 100% AND SELECTED FROM THE FOLLOWING THREE GROUPS: (1) UP TO 100% OF A NON-CYCLIZABLE MONOALKANOLAMINE HAVING A PRIMARY AMINO GROUP, AND, WHERE THE AMOUNT IS MORE THAN ABOUT 50%, AT LEAST THAT PORTION IN EXCESS OF ABOUT 50% HAVING A BRANCHED CHAIN; (2) UP TO ABOUT 70% OF NON-CYCLIZABLE MONO-N-SUBSTITUTED MONO-ALKANOLAMINE HAVING AS THE ALKANOL SKELETAL CHAIN, CONNECTING THE NITROGEN ATOM AND THE HYDROXYL GROUP, A PLURALITY OF CARBON ATOMS OTHER THAN FOUR AND FIVE, AND HAVING DIRECTLY BONDED TO THE NITROGEN ATOM SINGLE NON-TERTIARY HYDROCARBON RADICAL; AND (3) UP TO ABOUT 10% OF AN UNSYMMETRICAL ALKYL-SUBSTITUTED ALIPHATIC NON-TERTARY DIAMINE HAVING A NON-CYCLIZABLE MOLECULE AND SELECTED FROM THE CLASS CONSISTING N-ALKYL SUBSTITUTED DIAMINES AND DIAMINES HAVING THE ALKYL SUBSTITUENT ON A CARBON ATOM ALPHA TO A NITROGEN ATOM, AT LEAST ABOUT 5% OF SAID DIAMINE BEING INCLUDED IN THE ABSENCE OF SAID UNSATURATED DICARBOXYLIC ACID COMPONENT; AND SAID INTERREACTIVE COMPONENTS BEING FURTHER SO SELECTED AND PROPORTIONED AS TO PROVIDE ONE MONO-N-SUBSTITUTED AMIDE LINKAGE, IN WHICH A SINGLE HYDROGEN ATOM IS ATTACHED TO THE NITROGEN, FOR ABOUT EACH 10-50 ATOMS IN THE SKELETAL CHAIN OF THE POLYMER.