| abstract |
The invention relates to a novel polyurethane dispersant and a preparation method thereof. The polyurethane dispersant is terminated by a nitrogen-containing heterocyclic compound during synthesis, and the nitrogen-containing heterocyclic compound is composed of an acid anhydride and a primary amine and a secondary amine or Hydroxyl or mercapto compounds are dehydrated and condensed, and the condensed product, that is, the nitrogen-containing heterocyclic compound contains an active hydrogen; the structural formula of the compound containing a primary amine and a secondary amine or hydroxyl or mercapto is as follows: , wherein n=1~5, preferably 2~4, R 1 and R 2 are alkyl groups containing 1 to 8 carbons respectively, both of which are either independently or connected by chemical bonds to form one or several saturated or unsaturated 4 ~8-membered ring, X is N, O or S. |