Stoving paint from Mesua ferrea L. seed oil based short oil polyester and MF resins blend

A short oil polyester resin based on Mesua ferrea L. (Nahar) seed oil was prepared by the conventional alcoholysis process with glycerol followed by polycondensation with phthalic anhydride using the azeotropic distillation technique. The extent of reaction (P) and average degree of polymerization (DP) with respect to the acid value were determined for this resinification reaction. This resin and a castor oil based similar type of resin were utilized for the preparation of stoving paints separately along with partially butylated melamine-formaldehyde (MF) resin (70:30 weight ratio) using an industrial Ball Mill system. The morphology and thermal stability of paints were studied by scanning electron microscope (SEM) and thermogravimetric (TG) analysis. The performance characteristics of both paints were investigated by measurement of gloss, flexibility, impact resistance, pencil hardness, adhesion, humidity and salt spray tests, etc. The results indicate that the paint based on Nahar oil polyester resin could be used in different applications as low cost stoving paint.