Abstract: Disclosed herein is a polymer (D) obtained by reacting a) at least one epoxide (E) having an average functionality of ?3.0 and a number average molar weight in a range of from 250 to 25000 g/mol as determined according to GPC using THE as solvent; b) at least one compound (P) having at least one pigment affinic group, where the pigment affinic group has at least one active hydrogen reactive to an epoxide group; and c) at least one compound(S) having at least one poly alkyleneoxide chain, where the compound(S) having at least one active hydrogen reactive to an epoxide group. Further disclosed herein is a method of using the polymer (D) as an aqueous dispersant for pigments.

Abstract: The present invention relates a process of the present invention for the preparation of an aqueous composition comprising a polyurethane carrying COOH groups and/or salt groups thereof, comprises the steps of (i) reacting at least one first polyisocyanate (A1) with at least one polyol carrying at least one COOH group (BX) and optionally at least one first polyol carrying no COOH group (B1) to form a first composition (C1), (ii) treating the first composition (C1) obtained in step (i) with at least one second polyol carrying no COOH group (B2), and optionally with at least one second polyisocyanate (A2), to form a second composition (C2), and (iii) optionally treating the second composition (C2) obtained in step (ii) with at least one third-polyisocyanate (A3), to form a third composition (C3), wherein step (i) is stopped at a reaction index in the range of 0.05 to 0.

Abstract: Disclosed herein is a coating composition including a pigment paste, where the pigment paste includes an organic pigment and an aryl-modified branched reaction product (P), including, in reacted form, a polyhydroxy-functional core moiety (a), and a shell moiety (b) including polyalkylene oxide units and aromatic units, where the polyalkylene oxide units and aromatic units are covalently linked to the core moiety via units including functional groups being reactive with hydroxy groups. Further disclosed herein is a method of producing a cured coating on a substrate by using the coating composition.

Abstract: The present invention relates process for preparing an aqueous polymer dispersion by radically initiated aqueous emulsion polymerization, which comprises polymerizing, in an aqueous polymerization medium a) in a first polymerization stage ?0.5 and ?15 wt % of at least one ?,?-monoethylenically unsaturated C3 to C6 monocarboxylic or dicarboxylic acid (monomers A1), ?5 and ?40 wt % of at least one monoethylenically unsaturated compound having at least one hydroxyl group (monomers B1), ?0-?40 wt % of carboxyl-free (meth)acrylic esters with a cycloaliphatic structure (monomers C1), ?15 and ?94.

Abstract: Described herein is an aqueous basecoat composition. Also described herein are a method of coating a substrate and use of the aqueous basecoat composition for improving the performance properties of basecoat materials.