A dispersant for coating system

A branched modified polyetheramine having a weight average molecular weight Mw in the range of ≥1000 g/mol to ≤100000 g/mol, which is obtained by reacting a mixture comprising,

• a) at least one branched polyetheramine polyol P containing at least one hydroxyl groups, having a weight average molecular weight Mw in the range of ≥500 g/mol to ≤10000 g/mol and
• b) at least one compound B selected from—
• (i) compounds of formula (I)
• R-Fg (I)
• wherein R is selected from the group consisting of
• linear or branched alkyl having at least 6 carbon atoms, wherein alkyl is unsubstituted or substituted by 1 or 2 radicals selected from OH and C1-C4-alkoxy;
• linear or branched alkenyl having at least 6 carbon atoms, wherein alkenyl is unsubstituted or substituted by 1 or 2 radicals selected from OH and C1-C4-alkoxy;
• a cycloaliphatic radical having at least 5 carbon atoms, wherein the cycloaliphatic radical is unsubstituted or substituted by 1 or 2 radicals selected, from OH, C1-C4-alkyl and C1-C4-alkoxy;
• and
• aryl and aryl-C1-C4-alkyl, wherein the aryl part is unsubstituted or substituted by 1, 2, 3, 4 or 5 radicals selected from halogen, OH, NH2, NHC1-C4-alkyl, N(C1-C4-alkyl)2, C1-C4-alkyl and C1-C4-alkoxy;
• and
• Fg is independently of one another, selected from the group consisting of carboxylic acid, carboxylic acid anhydride, carboxylic acid ester, isocyanate, and mixtures thereof;
• (ii) compounds of the formulae (II) and (III)
• wherein
• k is 0, 1, 2, 3 or 4;
• R1 is selected from the group consisting of halogen, OH, NH2, NHC1-C4-alkyl, N(C1-C4-alkyl)2, C1-C4-alkyl and C1-C4-alkoxy;
• and
• R2 is selected from the group consisting of hydrogen and C1-C4-alkyl;
• (iii) lactones of the formula (IV)
• wherein A is a C3-C12-alkylene, which is unsubstituted or substituted by 1 or 2 radicals selected from OH, C1-C4-alkyl and C1-C4-alkoxy;
• iv) internal anhydride of the formula (V)
• wherein D is selected from the group consisting of C2-C6 alkylene, C2-alkenylene and 1,2-phenylene, where C2-C6 alkylene and C2 alkenylene are unsubstituted or carry a C1-C18 alkyl or C1-C18 alkenyl radical and 1,2-phenylene is unsubstituted or substituted by 1 or 2 radicals selected from the group consisting of 1 or 2 radicals selected from OH, C1-C4-alkyl and C1-C4-alkoxy, —COOH or halogen.