Cationic thermosetting quaternized polyamide-epichlorohydrin resins and method of preparing same

Claim 1

A PROCESS OF PREPARING A WATER-SOLUBLE CATIONIC THERMOSETTING RESIN OF GOOD STABILITY WHICH COMPRISES FROMING A WATER-SOLUBLE, LONE-CHAIN POLYAMIDE CONTAINING SECONDARY AMINE GROUPS BY REACTING A C3-C10 SATURATED ALIPHATIC DICARBOXYLIC ACID WITH A POLYALKYLEN POLYAMINE HAVING TWO PRIMARY AND AT LEAST ONE SECONDARY AMINE GROUP LINKED TOGETHER BY GROUPS OF THE FORMUAL -CNH2N- WHERE N IS AN INTEGER FROM 2 TO 4 AND THE NUMBER OF SUCH GROUPS IN THE MOLECULE RANGES FROM 2 TO 8 AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 110*C. TO ABOUT 250*C., THE MOLE RATIO OF POLYALKYLENE POLYAMINE TO DICARBOXYLIC ACID BEING ROM ABOUT 0.8:1 TO ABOUT 1.4:1, AND THEN REACTING THE POLYAMIDE IN AQUEOUS SOLUTION AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 45*C. TO ABOUT 100*C., FIRST PARTIALLY WITH EPICHLOROHYDRIN UNTIL AT LEAST ABOUT 25% OF THE SECONDARY AMINE GROUPS IN SAID POLYAMIDE HAVE REACTED WITH EPICHLOROHYDIN AND THEN WITH EPICHLOROHYDRIN AND A QUATERNIZING AGENT CAPABLE OF QUAERNIZING ERTIARY NITROGEN ATOMS FORMED DURING THE REACTION AND SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL ESTERS OF MINERAL ACIDS, 1,3-DICHLOROPROPANOL-2,1-CHLOROGLYCEROL, BENZYL CHLORIDE AND METHYL PTOLUENE SULFONATE, THE MOLE RATIO OF EPICHLOROHYDRIN TO SECONDARY AMINE GROUPS OF SAID POLYAMIDE BEING FROM ABOUT 0.5:1 TO ABOUT 1.8:1, AND SAID QUARTERNIZING AGENT BEING SUFFICIENT IN AMOUNT TO CONVERT FROM ABOUT 25% TO ABOUT 75% OF TERTIARY AMINE GROUPS FORMED DURING THE REACTION OF QUATERNARY GROUPS, CONTINUING THE REACTION OF SAID POLYAMIDE WITH SPICHLOROHYDRIN AND A QUATERNIZING AGENT UNTIL A WATER-SOLUBLE CATIONIC THERMOSETTING RESIN IS OBTAINED, AND TERMINATING THE REACTION WHILE SAID CATIONIC THERMOSETTING RESIN IS STILL WTER-SOLUBLE.