Addition compounds suitable as dispersants or anti-sedimentation agents

1. An addition compound, prepared by reacting

a) one or more polyisocyanates having an average functionality of 2-6;

b) one or more compounds comprising

at least one chain selected from the group consisting of polyester, polyether, polyacrylate, polyurethane, polyolefin and a combination thereof; and

at least one isocyanate reactive group,

wherein the at least one isocyanate reactive group is an amino group; and

c) one or more compounds selected from the group consisting of N-(3-aminopropyl) imidazole (API), benzoguanamine (BGA) and N-(2-aminoethyl) piperazine (AEP); and

d) one or more compounds comprising at least one isocyanate reactive group and at least one pigment affinity group,

wherein component d) is selected from the group consisting of t-butyl amine, dibutylamine, ethylene cyanohydrin, 2,4,7,9-tetramethyl-5-decin-4,7-diol, phenyl naphthylamine, dimethyl benzidine, p-amino azobenzene, and amino anthraquinone.

2. The addition compound according to claim 1 , wherein component c) is N-(3-aminopropyl) imidazole (API) or benzoguanamine (BGA).

3. The addition compound according to claim 1 , wherein component c) is N-(2-aminoethyl) piperazine (AEP).

4. The addition compound according to claim 1 , wherein component b) is used in an amount of 5-90 equivalent % based on the isocyanate groups of component a).

5. The addition compound according to claim 1 , wherein the chain of component b) is selected from the group consisting of polyetheramines having (C 2 -C 4 ) alkyleneoxy repeating units, polyetheralcohols having (C 2 -C 4 ) alkyleneoxy repeating units and combinations thereof.

6. The addition compound according to claim 1 , wherein the at least one amino group of component b) is in the terminal of a polymer chain.

7. The addition compound according to claim 1 , wherein component a) is selected from the group consisting of i) a mixture of hexamethylene diisocyanate and toluene diisocyanate (HDI/TDI), ii) methylene diphenyl diisocyanate (MDI) and iii) mixtures thereof.

8. A process for preparing the addition compound according to claim 1 , comprising:

reacting component a) with components b), c) and d) sequentially.

9. A dispersant or an anti-sedimentation agent, comprising:

the addition compound according to claim 1 .

10. A pigment, filler or matting agent, comprising:

the dispersant or anti-sedimentation agent according to claim 9 .

11. A pigment, filler or matting agent, comprising:

the addition compound according to claim 1 .