Abstract: The present invention is related to a surface control additive for a radiation curing system, the method for its preparation as well as its application. The surface control additive has the following structure: wherein A is wherein m is an integer from 0 to 400, n is an integer from 1 to 500, x is an integer from 0 to 800, p is an integer from 0 to 600, q is an integer from 1 to 800, R4 and R5 are H or CH3 respectively, R6 is H or a linear or a branched alkyl group containing 1-18 carbon atoms or an acyl group containing 2-5 carbon atoms. The surface control additive of the present invention is applied to radiation curing (UV/EB) paint and inks, enables the coatings to maintain non-adhesive and smooth for a long time, and minimizes transferable precipitates from a cured film. In addition, by using different combinations of EO and PO, the surface control additive of the present invention can adapt to a free selection from high-polarity aquosity to a low-polarity aliphatic hydrocarbon solvent system.

Abstract: The present invention is related to a polyurethane dispersant and a preparation method thereof. The polyurethane dispersant is terminated by a nitrogen-containing heterocyclic compound during synthesis. The nitrogen-containing heterocyclic compound is prepared by subjecting anhydride and a compound containing a primary amine and a secondary amine or a hydroxyl or mercapto group to dehydration condensation. The condensed product is the nitrogen-containing heterocyclic compound, containing a reactive hydrogen. The structural formula of the compound containing the primary amine and the secondary amine or hydroxyl or mercapto group is shown as follows: wherein n=1 to 5, and preferably 2 to 4, R1 and R2 are respectively alkyls containing 1 to 8 carbons, R1 and R2 are independent of each other or connected by a chemical bond to form one or more saturated or unsaturated 4-member to 8-member rings, and X represents N, O, or S.