METHOD FOR APPLYING PRIMER FOR STEEL CORROSION PROOFING

摘要

PROBLEM TO BE SOLVED: To provide a long term maintenance-free heavy-duty coating for corrosion proofing which significantly saves time for a coating operation process because the application of a main coating is possible at an interval of five minutes after applying a primer and remarkably improves the peeling-off resistance of a coating edge. SOLUTION: When a two-part reactive urethane primer for steel corrosion proofing is applied, first an isocyanate component and a polyol component are continuously mixed by fixed quantity within the range of NCO to activated hydrogen ratio of 1.0-2.0 and this mixture is applied. Next, a two-part reactive non-solvent urethane corrosion proof coating material is applied before the complete curing of the primer. Thus the method for applying the two-part reactive urethane primer for steel corrosion proofing is provided.