Patent ID: 8524853

Claim:
A polyarylene ether block copolymer of the structure A-K—X—K-A, wherein X— is a polyarylene ether segment with number-average molar mass of at least 5000 g/mol, and A- is a segment of the general structure R 2 NH—(R 1 —NH—CO—Ar—CO—NH) n —R 1 —NH—, in which R 1 is a linear or branched alkylene group having from 2 to 12 carbon atoms and Ar is an arylene group having from 6 to 18 carbon atoms, and R 2 is selected from aryloyl, alkyloyl, and H, and in which the number average of n is from 1 to 3, and wherein there is a coupling group K of the structure —CO—Ar 3 —CO— linking each A to X, in which Ar a is an aromatic group having from 6 to 18 carbon atoms.