Patent ID: 6677427
Filing Date: 2004-01-13
Classification: C08G,C08L,C12P,D21H

Abstract:
A process for preparing a polyamide which comprises reacting (1) at least one diester, and (2) at least one polyamine in the presence of a hydrolytic enzyme,the diester has the following general formula: R1OOCâ€”Râ€”COOR2 or R1OOCâ€”COOR2 wherein R is a C1 to C20 hydrocarbyl group selected from one of alkyl, haloalkyl, alkylene, aryl, aralkyl, aralkylene, alkarylene, arylene, alkenyl or mixtures thereof; R1 and R2 are C1 to C22 hydrocarbyl group selected from alkyl, haloalkyl, alkylene, aryl, aralkyl, aralkylene, alkarylene, arylene, alkenyl or mixtures thereof; and wherein R1 and R2 may be the same or different; the polyamine has the following general formula: H2Nâ€”R3â€”[Xâ€”R4]nâ€”NH2 wherein R3 and R4 are C1 to C6 hydrocarbyl group selected from one of alkyl, haloalkyl, alkylene, aryl, aralkyl, aralkylene, alkarylene, arylene, alkenyl or mixtures thereof; X is selected from one or none of heteroatom or non-heteroatom, wherein the non-heteroatom comprises amine, thiol, carbonyl, carboxyl or C1 to C6 hydrocarbyl group selected from one of alkanol, alkyl, haloalkyl, alkylene, aryl, aralkyl, aralkylene, alkarylene, arylene or alkenyl; n is from 0 to 40; and wherein R3 and R4 may be the same or different; and the amount of hydrolytic enzyme present is at least about 0.01% by weight based on the total weight of the diester and polyamine.