Vernonia and Epoxidized Linseed and Soybean Oils: As Low Yellowing Diluents in Alkyd Coatings

Abstract

Yellowing of vegetable oils in coatings continue to be a problem to paint formulators and users and to resin manufacturers. This characteristic occurs in coatings where there is unsaturation in the triglyceride fatty acid residues of the oils used in the resin or binder. Yellowing is the single most important factor which limits the use of linseed oil‐based white paints and enamels for external use in buildings. A thorough understanding of this phenomenon is necessary to the resin manufacturer and paint formulator. Unfortunately, yellowing of vegetable oils in coatings is still a controversial subject. The chemistry behind the process is not yet known. Many factors have been attributed to causing or related to the onset and degree of yellowing. These include:

Citation

Muturi‐Mwangi, P., Dirlikov, S. and Gitu, P.M. (1994), "Vernonia and Epoxidized Linseed and Soybean Oils: As Low Yellowing Diluents in Alkyd Coatings", Pigment & Resin Technology, Vol. 23 No. 3, pp. 3-7. https://doi.org/10.1108/eb043107