Associative cationic polyurethanes and their use as thickeners

摘要

Water-soluble or water-dispersible, amphiphilic, cationic, associative polyurethanes (I), containing at least one protonated or quaternized amino function and at least one hydrophobic group, are new. Water-soluble or water-dispersible, amphiphilic, cationic, associative polyurethanes of formula R-X-(Q)n-(L-(Y)m)r-L'-(Q')p-X'-R' (I) are new. R, R' = H or hydrophobic group; X, X' = L'' or group containing an amino function (optionally carrying a hydrophobic group); L, L', L'' = group derived from a diisocyanate; Q, Q' = group containing an amino function (optionally carrying a hydrophobic group); Y = hydrophilic group; r = 1-100 (preferably 1-50, especially 1-25); n, m, p = 0-1000; provided that (I) contains at least one protonated or quaternized amino function and at least one hydrophobic group.