Patent ID: 8338558

Claim:
A polyurethane dispersant comprising a polyurethane backbone and laterally attached solvent-solubilizing: a) polyether chains of poly(C 2-4 -alkylene oxide), b) polyester chains, c) polyacrylic chains, or d) polyolefin chains, or mixtures thereof; and optionally one or more chain terminators wherein on average each dispersant molecule has at least one reactive carbon to carbon double bond in the backbone, the laterally attached solvent solubilizing chains, or the chain terminators, or combinations thereof, further comprising a nitrogen in a non-reactive amine (non-reactive with respect to isocyanates) laterally attached to the polyurethane backbone such that said nitrogen atom is separated by at least two atoms from the closest atom on the backbone and wherein the non-reactive amine is derived from the chemical group consisting of N,N-bis(2-hydroxyethyl)isonicotinamide; 1,1′-{[3-(dimethylamino)-propyl]imino}bis-2-propanol; or the compound formed from the Michael addition of dimethylaminopropylamine and 2-hydroxyethyl acrylate and wherein said non-reactive amine is a tertiary amine, a quaternary ammonium salt, or combinations thereof.