Process for manufacturing polyamide resin

Claim 1

A METHOD FOR PREPARING A POLYAMIDE RESIN OF THE IMIDAZOLINE TYPE HAVING AN AMINE NUMBER OF FROM 270 TO 340 AND A VISCOSITY OF FROM 4 TO 12 POISES AT 75*C., SAID METHOD COMPRISING HEATING TO A TEMPERATURE OF FROM ABOUT 250 TO 285*C. A REACTION MIXTURE CONSISTING OF ESSENTIALLY OF (A) POLYMERIZED FAT ACIDS, (B) MONOMERIC FAT ACIDS OF FROM 12 TO 22 CARBON ATOMS, PRESENT IN THE AMOUNT OF FROM 0.03 TO 0.2 EQUIVALENT PER EQUIVALENT OF SAID POLYMEIZED FAT ACIDS, AND (C) AT LEAST ONE AMINE SELECTED FROM THE GROUP CONSISTING OF DIETHYLENETRIAMINE, TRIETHYLENETETRAMINE AND TETRAETHYLENEPENTAMINE, PRESENT IN THE AMOUNT OF FROM 3.3 TO 3.9 EQUIVALENTS PER EQUIVALENT OF TOTAL POLYMERIZED AND MONOMERIC FAT ACIDS, DISTILLING OFF WATER PRESENT IN THE REACTION MIXTURE AS THE HEATING PROGRESSES, AND MAINTAINING THE SAID MIXTURE WITHIN THE AFORESAID TEMPERATURE RANGE OF ABOUT 250 TO 285*C. UNTIL EVOLUTION OF WATER FROM THE MIXTURE IS SUBSTANTIALLY COMPLETE.

Claim 2

A METHOD FOR PREPARING A POLYAMIDE RESIN OF THE IMIDAZOLINE TYPE HAVING AN AMINE NUMBER OF FROM 270 TO 340 AND A VISCOSITY OF FROM 4 TO 12 POISES AT 75*C., SAID METHOD COMPRISING HEATING TO A TEMPERATURE OF FROM ABOUT 250 TO 285*C. A REACTION MIXTURE CONSISTING OF ESSENTIALLY OF (A) POLYMERIZED FAT ACIDS, (B) MONOMERIC FAT ACIDS OF FROM 12 TO 22 CARBON ATOMS, PRESENT IN THE AMOUNT OF FROM 0.03 TO 0.2 EQUIVALENT PER EQUIVALENT OF SAID POLYMEIZED FAT ACIDS, AND (C) AT LEAST ONE AMINE SELECTED FROM THE GROUP CONSISTING OF DIETHYLENETRIAMINE, TRIETHYLENETETRAMINE AND TETRAETHYLENEPENTAMINE, PRESENT IN THE AMOUNT OF FROM 3.3 TO 3.9 EQUIVALENTS PER EQUIVALENT OF TOTAL POLYMERIZED AND MONOMERIC FAT ACIDS, DISTILLING OFF WATER PRESENT IN THE REACTION MIXTURE AS THE HEATING PROGRESSES, AND MAINTAINING THE SAID MIXTURE WITHIN THE AFORESAID TEMPERATURE RANGE OF ABOUT 250 TO 285*C. UNTIL EVOLUTION OF WATER FROM THE MIXTURE IS SUBSTANTIALLY COMPLETE.