| abstract |
Addition compounds suitable for use as dispersing agents and obtainable by reacting polyisocyanates having an average functionality of 2.5 to 10 with monohydroxy compounds, with compounds of formula II G-(E)n II wherein E represents -OH, -NH2 and/or -NHR (wherein R represents an alkyl group having 1 to 4 carbon atoms) and n represents 2 or 3 and G represents an aliphatic, cycloaliphatic and/or aromatic group, and with compounds of formula III Z-Q III wherein Q represents -OH, -NH2, -NHR (wherein R represents an alkyl group having 1 to 4 carbon atoms) or -SH and Z denotes a group containing at least one nitrogen-containing, basic group. The invention also relates to processes for the preparation of these addition compounds, to their use and to pulverulent or fibrous solids which are to be incorporated into liquid systems and which have been coated with these dispersing agents. |