| abstract |
Disclosed are aqueous dispersions from isocyanate prepolymers useful for the production of isocyanate functional polyurethane prepolymers and flat articles having excellent alcohol solvent resistance. This prepolymer comprises A) i) an aliphatic and / or alicyclic isocyanate, ii) an isocyanate selected from the group consisting of a mixture of an aromatic isocyanate and an aliphatic and / or alicyclic isocyanate, B) 700- A di- or polyhydroxy compound having a number average molecular weight of about 16000, and C) optionally a di- or polyhydroxy compound having a number average molecular weight of less than 700, a) at least of component A), B) or C) One has a functionality greater than 2, b) both components A) and B) are difunctional, and component C) is of the formula R- (OH) 3 where R is 2 to 2 It is a linear or branched saturated aliphatic group having 8 carbon atoms.) It can be obtained by reacting under the condition that it cannot be a trihydroxy compound represented by. |