Pressure-sensitive adhesive tape

Claim 1

THE METHOD OF MAKING A SOLVENT-RESISTANT UNIFIED FIBROUS WEB SUITABLE FOR APPLICATION AS A PRESSURE-SENSITIVE ADHESIVE TAPE BACKING, COMPRISING: MIXING TOGETHER IN SOLUTION IN A VOLATILE ORGANIC SOLVENT A SOLUBLE NITROGEN-CONTAINING POLYESTER POLYMER AS HEREINAFTER DEFINED AND A SMALL PORPORTION OF AN ALDEHYDIC CURING AGENT SUFFICIENT TO PRODUCE WITH SAID POLYMER A HEAT-CURED THIN FILM HAVING A MODULUS AT 100% ELONGATION OF ABOUT 30-160 LBS./SQ. IN AND A TENSILE STRENGHT OF AT LEAST ABOUT 70 LBS./SQ. AT AN ELONGATION OF AT LEAST ABOUT 300%; IMPREGNATING A TIN POROUS FLEXIBLE FIBROUS WEB THEREWITH; AND THEN DRYING AND HEATING THE IMPREGNATED WEB TO CURE THE POLYMER AND UNIFY THE WEB; SAID POLYMER BEING A LOW-ACID-NUMBER SOLUBLE CONDENSATION PRODUCT FORMED BY SIMULTANEOUSLY HEATING TOGETHER SUBSTANTIALLY EQUIMOLAR AMOUNTS OF INTER-REACTIVE COMPONENTS CONSISTING ESSENTIALLY OF (A) DICARBOXYLIC ACIDS INCLUDING AT LEAST ABOUT 80% OF DICARBOXYLIC ACID HAVING AT LEAST FOUR CARBON ATOMS IN THE SKELETAL CHAIN, HAVING THE CARBOXYL GROUPS ATTACHED TO SEPARATE ALIPHATIC CARBON ATOMS, AND HAVING ESSENTIALLY NO CONJUGATED UNSATURATION, AND NOT MORE THAN ABOUT 20% OF DICARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF MALEIC, FUMARIC, ITACONIC, AND CITRACONIC ACIDS, AND ADDUCTS OF MALEIC ABHYDRIDE WITH CONJUGATED DIENES; AND (B) COMPOUNDS REACTIVE WITH SAID ACIDS AND SELECTED FROM THE CLASS CONSISTING OF PHENYLDIETHANOLAMINE, NONCYCLIZABLE MONOALKANOLAMINES HAVING A SINGLE PRIMARY AMINO GROUP, NONCYCLIZABLE N-MONOHYDROCARBON-SUBITUTED MONOALKANOLAMINES HAVING A SINGLE SECONDARY AMINO GROUP, GLYCOLS, AND MIXTURES THEREOF, AND INCLUDING PHENYLDIETHANOLAMINE IN AN AMOUNT SUFFICIENT TO AVERAGE AT LEAST ONE

Claim 2

THE METHOD OF MAKING A SOLVENT-RESISTANT UNIFIED FIBROUS WEB SUITABLE FOR APPLICATION AS A PRESSURE-SENSITIVE ADHESIVE TAPE BACKING, COMPRISING: MIXING TOGETHER IN SOLUTION IN A VOLATILE ORGANIC SOLVENT A SOLUBLE NITROGEN-CONTAINING POLYESTER POLYMER AS HEREINAFTER DEFINED AND A SMALL PORPORTION OF AN ALDEHYDIC CURING AGENT SUFFICIENT TO PRODUCE WITH SAID POLYMER A HEAT-CURED THIN FILM HAVING A MODULUS AT 100% ELONGATION OF ABOUT 30-160 LBS./SQ. IN AND A TENSILE STRENGHT OF AT LEAST ABOUT 70 LBS./SQ. AT AN ELONGATION OF AT LEAST ABOUT 300%; IMPREGNATING A TIN POROUS FLEXIBLE FIBROUS WEB THEREWITH; AND THEN DRYING AND HEATING THE IMPREGNATED WEB TO CURE THE POLYMER AND UNIFY THE WEB; SAID POLYMER BEING A LOW-ACID-NUMBER SOLUBLE CONDENSATION PRODUCT FORMED BY SIMULTANEOUSLY HEATING TOGETHER SUBSTANTIALLY EQUIMOLAR AMOUNTS OF INTER-REACTIVE COMPONENTS CONSISTING ESSENTIALLY OF (A) DICARBOXYLIC ACIDS INCLUDING AT LEAST ABOUT 80% OF DICARBOXYLIC ACID HAVING AT LEAST FOUR CARBON ATOMS IN THE SKELETAL CHAIN, HAVING THE CARBOXYL GROUPS ATTACHED TO SEPARATE ALIPHATIC CARBON ATOMS, AND HAVING ESSENTIALLY NO CONJUGATED UNSATURATION, AND NOT MORE THAN ABOUT 20% OF DICARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF MALEIC, FUMARIC, ITACONIC, AND CITRACONIC ACIDS, AND ADDUCTS OF MALEIC ABHYDRIDE WITH CONJUGATED DIENES; AND (B) COMPOUNDS REACTIVE WITH SAID ACIDS AND SELECTED FROM THE CLASS CONSISTING OF PHENYLDIETHANOLAMINE, NONCYCLIZABLE MONOALKANOLAMINES HAVING A SINGLE PRIMARY AMINO GROUP, NONCYCLIZABLE N-MONOHYDROCARBON-SUBITUTED MONOALKANOLAMINES HAVING A SINGLE SECONDARY AMINO GROUP, GLYCOLS, AND MIXTURES THEREOF, AND INCLUDING PHENYLDIETHANOLAMINE IN AN AMOUNT SUFFICIENT TO AVERAGE AT LEAST ONE