• The resin was cooled to 160–170 ◦C and diluted with MTO to 80% solids. Extent of the reaction was monitored by acid value and viscosity (Gardner scale) determinations at regular intervals. Heating was stopped when the acid value of the resin reached below 12mgKOH/g. Nine experimental setswere prepared by varying the PE and DPE compositions. The detailed recipe and theoretical alkyd constants are illustrated in Table 1.