Patent ID: 6174965
Filing Date: 2001-01-16
Classification: C08G

Abstract:
A process for producing a polyester resin with the use of at least one polybasic acid and at least one polyhydric alcohol as starting ingredients, which comprises the steps of polycondensating, together with the polybasic acid and the polyhydric alcohol, a nitrogen-containing compound represented by the formula ##STR7##(wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and independently represent hydroxyalkyl, carboxyaryl, carboxyalkyl, carboxycycloalkyl, hydrogen, alkyl, cycloalkyl or aryl, provided that at least one of R.sup.1, R.sup.2 and R.sup.3 represents hydroxyalkyl, carboxyaryl, carboxyalkyl or carboxycycloalkyl) to introduce amino groups to the resin, and reacting the amino groups with alkyl halide to convert some or all of the amino groups to quaternary ammonium base represented by the formula ##STR8##(wherein X is halogen and R is alkyl).