Polymers made from telechelic N-alkylated polyamides

A thermoplastic polyurethane composition comprising the reaction product of:

• (i) a polyol component containing a telechelic polyamide;
• and (ii) a polyisocyanate component;
• and optionally (iii) a chain extender component;
• wherein the telechelic polyamide:
• (a) has repeat units connected by linkages, wherein the linkages comprise heteroatom containing linkages, and has functional end groups selected from carboxyl or primary or secondary amine, wherein at least 70 mole percent of the telechelic polyamide has exactly two functional end groups of the same functional type selected from the group consisting of amine or carboxyl functional end groups;
• (b) has a polyamide segment comprising at least two amide linkages derived from reacting an amine with a carboxyl group, wherein said polyamide segment comprises repeat units derived from two or more monomers selected from lactams, aminocarboxylic acids, dicarboxylic acids, and diamines;
• (c) wherein at least 10 percent of the total number of the heteroatom containing linkages are amide linkages;
• and
• (d) wherein at least 50 percent of the amide linkages are tertiary amide linkages.