1,4-Butanediol, 2,3-bis((gamma-omega-perfluoro-C6-20-alkyl)thio) derivs, polymers with 1,6-diisocyanatotrimethylhexane and 2,2'-(methylimino)bis(ethanol) 68037-23-0 Trimethylhexamethylenediisocyanate, N-methyldiethanolamine, 2,3-bis(1,1,2,2-tetrahydroperfluoroalkyl(C6-C20)thio)butane-1,4-diol polymer