PROBLEM TO BE SOLVED: To provide a high-molecular-weight poly(pentamethylene adipamide) resin by polycondensation under pressure and heating from 1,5-diaminopentane and adipic acid.;SOLUTION: This poly(pentamethylene adipamide) resin is manufactured from 1,5-diaminopentane and adipic acid, by polycondensation under pressure and heating and in the co-presence of water, of a raw material obtained by mixing 1,5-diaminopentane and adipic acid in the molar ratio A/B of ≥1.005 and ≤1.05, wherein A is a molar number of the 1,5-diaminopentane and B is a molar number of the adipic acid.;COPYRIGHT: (C)2004,JPO
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