Polyvinyl acetal-phenol aldehyde resin wire enamel and method of using same

Claim 2

AN ELECTRICAL INSULATION LIQUID WIRE ENAMEL COATING COMPOSITION COMPRISING AN ORGANIC SOLVENT SOLUTION CONTAINING AS ESSENTIAL INGREDIENTS, IN PARTS BY WEIGHT, (A) 100 PARTS OF A SOLUBLE, HEAT HARDENABLE, PHENOL PHATIC ALDEHYDE (B) 5-100 PARTS OF A SOLUBLE, HEAT HARDENABLE, PHENOL ALDEHYDE RESIN OBTAINED BY CONDENSING 1 MOL OF A PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL, CRESOL, XYLENOL AND MIXTURES THEREOF, WITH FROM 0.75 TO 2 MOLS OF FORMALDEHYDE UNDER ALKALINE CONDITIONS (C) 0.05-3 PARTS HEXAMETHYLENETETRAMINE, SAID POLYVINYL ACETAL HAVING TAKEN BEEN NEUTRALIZED AFTER ACETALIZATION WITH A MATERIAL TAKEN FROM THE GROUP CONSISTING OF AMMONIUM HYDROXIDE AND ORGANIC AMINES.

Claim 3

IN A PROCESS FOR PRODUCING A WIRE COATED WITH AN INSOLUBLE, INSULATIVE COATING THE STEP COMPRISING ADDING 0.05-3 PARTS BY WEIGHT OF HEXAMETHYLENETETRAMINE TO A LIQUID COATING COMPOSITION COMPRISNG, IN PARTS BY WEIGHT AN ORGANIC SOLVENT SOLUTION OF 100 PARTS OF A POLYVINYL ACETAL OF A SATURATED ALIPHATIC ALDEHYDE AND 5-100 PARTS OF A SOLUBLE, HEAT-HARDENABLE, PHENOL-ALDEHYDE RESIN, THERUPON COATING THE COMPOSITION ON A WIRE, DRYING AND HEAT CURING AT TEMPERATURES FRON 250-450*C., SAID POLYVINYL ACETAL HAVING BEEN ACETALIZED WITH A MEMBER OF THE GROUP CONSISTING OF FORMALDEHYDE, ACETALDEHYDE, PROPIONALDEHYDE, BUTYRALDEHYDE AND MIXTURES THEREOF AND THEREAFTER HAVING BEEN NEUTRALIZED WITH A MATERIAL TAKEN FROM THE GROUP CONSISTING OF AMMONIA AND ORGANIC AMINES, SAID PHENOL ALDEHYDE RESIN HAVING BEEN OBTAINED BY CONDENSING 1 MOL OF A PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL, CRESOL, XYLENOL AND MIXTURES THEREOF, WITH FROM 0.75 TO 2 MOLS OF FORMALDEHYDE UNDER ALKALINE CONDITIONS.

Claim 4

IN A PROCESS FOR PRODUCING A WIRE COATED WITH AN INSOLUBLE, INSULATIVE COATING THE STEP COMPRISING ADDING 0.05-3 PARTS BY WEIGHT OF HEXAMETHYLENETETRAMINE TO A LIQUID COATING COMPOSITION COMPRISNG, IN PARTS BY WEIGHT AN ORGANIC SOLVENT SOLUTION OF 100 PARTS OF A POLYVINYL ACETAL OF A SATURATED ALIPHATIC ALDEHYDE AND 5-100 PARTS OF A SOLUBLE, HEAT-HARDENABLE, PHENOL-ALDEHYDE RESIN, THERUPON COATING THE COMPOSITION ON A WIRE, DRYING AND HEAT CURING AT TEMPERATURES FRON 250-450*C., SAID POLYVINYL ACETAL HAVING BEEN ACETALIZED WITH A MEMBER OF THE GROUP CONSISTING OF FORMALDEHYDE, ACETALDEHYDE, PROPIONALDEHYDE, BUTYRALDEHYDE AND MIXTURES THEREOF AND THEREAFTER HAVING BEEN NEUTRALIZED WITH A MATERIAL TAKEN FROM THE GROUP CONSISTING OF AMMONIA AND ORGANIC AMINES, SAID PHENOL ALDEHYDE RESIN HAVING BEEN OBTAINED BY CONDENSING 1 MOL OF A PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL, CRESOL, XYLENOL AND MIXTURES THEREOF, WITH FROM 0.75 TO 2 MOLS OF FORMALDEHYDE UNDER ALKALINE CONDITIONS.