Nylon copolymer containing comonomer dimer acid

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a nylon 6 copolymer and a nylon 66 copolymer which contain a dimer acid as the comonomer and, simultaneously, have a high melting point and a high molecular weight.;SOLUTION: The method for producing a nylon 6 copolymer comprises a step of subjecting 80.0-99.9 mol% ε-caprolactam, 0.1-3.0 mol% dimer acid, and 0.1-3.0 mol% 2-methyl-1,5-pentanediamine to polymerization reaction, and the method for producing a nylon 66 copolymer comprises a step of subjecting 60.0-90 mol% hexanedioic acid and hexamethylenediamine, 0.1-3.0 mol% dimer acid, and 0.1-3.0 mol% 2-methyl-1,5-pentanediamine to polymerization reaction. In both methods, the polymerization temperature is preferably 200-280°C.;COPYRIGHT: (C)2003,JPO