The influence of the temperature on the crosslinking of soyabean oil modified epoxy resin (ESO) by dianhydrite piromelitic (DAP) in presence of the dimetylbenzylamin (DMBA) has been studied and the optimal conditions for the curing have been determined. It was showed that at the optimal conditions: Equal mol of epoxy and anhydrite groups, reactions temperature and duration 120°C and 90 min, respectively, the DMBA content of 2.31 percent of the total mass of ESO and DAP, the epoxy and anhydrite groups had been totally converted, led to formation of a cured coating with gel traction 85 percent, swelling degree 160 percent, pencil harness HB, impact resistance 200 kG.cm, flexibility I mm, gloss at 60° 75 percent, adhesion 0 point.