novel copolyoxalamides having the recurring unit ## str1 ## are disclosed wherein r is a divalent aromatic radical and r 1 is a divalent radical selected from the group consisting of 2 , 2 , 4 - and 2 , 4 , 4 - trimethylhexylene , ## str2 ## and mixtures thereof . the novel copolyoxalamides are injection - moldable , thermoplastic materials which are characterized by good high temperature resistance and excellent resistance to oxidative degradation .