Abstract: The present invention relates to aromatic polyurethane polyols suitable for use in coating compositions, and particularly useful in primers applied to metal substrates, comprising the reaction product of (A) at least one diol component selected from the group consisting of ?,? diols, ?,? diols and mixtures thereof, (B) at least one triisyocyanate, and (C) at least one diisocyanate where at least one of the isocyanates is aromatic and wherein the polyurethane polyol has a molecular weight (Mn) less than 3,000. The invention further relates to a method of coating a substrate with the coating composition.