Abstract: Unsaturated polyesters based on isophthalic acid are used as additive binders in coating agents. With the use of these polyesters, the resultant coatings have an adhesiveness to metallic substrates to be protected which is improved in relation to the comparable state of the art coatings. Furthermore, coatings are obtained by which the conditions for the protection of metals from corrosion (good adhesion of the coatings on metallic, in particular, critical metallic substrates, and good resistance of the coatings to environmental influences, in particular, good resistance to hydrolysis) are improved. Hence, improved protection from corrosion is achieved.

Abstract: A coating composition which comprises a binder consisting of a mixture of a polyester with an aminoplast, a low-molecular weight precursor of said aminoplast or a mixture thereof; water; an organic auxiliary solvent; and optional conventional adjuvants; wherein the auxiliary solvent consists of 10-100% by weight of 1,4-bis (hydroxymetyl)cyclohexane. When baked, the cyclohexane compound is incorporated into the resultant coating.