Synthetic Resins resistant to Fungal Attack

THE difficulty of preparing paints, varnishes and lacquers having resistance to fungal attack is well known. In particular, drying oils, even when incorporated in alkyd resins, are known to provide a source of organically combined carbon for fungal growth. The method of protecting paints by the addition of fungicides is unsatisfactory1–4, mainly because the additives become ineffective long before the end of the useful life of the paint. The use of pigments with fungicidal or fungistatic properties is more promising, but there are few of these pigments, and they either limit the possible colour or decrease the durability of the paint.