Patent ID: 7718816

Claim:
A method for producing a carboxamide derivative comprising: synthesizing a carboxamide by reacting, no presence a catalyst, a fatty acid ester represented by General Formula (1) below with a diamine represented by General Formula (2) below at a molar ratio of the diamine to the fatty acid ester of 1.20 to 1.60; and producing a carboxamide derivative by reacting the carboxamide and hydrogen peroxide, wherein the carboxamide comprises 0.02% by weight to 0.18% by weight of amide ester represented by General Formula (3) below; and the carboxamide derivative is represented by General Formula (4) below: R 1 —COOR General Formula (1) wherein, in General Formula (1) above, R 1 represents any one of a straight-chain or branched-chain alkyl group, alkenyl group and hydroxyalkyl group having a carbon number of five to 12; and R 2 represents a straight-chain or branched-chain alkyl group having a carbon number of one to four; wherein, in General Formula (2) above, R 3 and R 4 are the same or different and represent an alkyl group having a carbon number of one to four; and n represents an integer of two to four; wherein, in General Formula (3) above, R 1 and R 5 represent any one of a straight-chain or branched-chain alkyl group, alkenyl group and hydroxyalkyl group having a carbon number of five to 12; and n represents an integer of two to four, and wherein, in General Formula (4), R 1 represents any one of a straight-chain or branched-chain alkyl group, alkenyl group and hydroxyalkyl group having a carbon number of five to 12; R 3 and R 4 are the same or different, representing an alkyl group having a carbon number of one to four; and n represents an integer of two to four.