UNDERCOAT FOR ANTICORROSION COATING Russian patent published in 1997 - IPC

FIELD: production of water resistant and anticorrosion undercoats for urethane, acryl urethane and epoxy coatings for protection of articles of aircraft technique against corrosion. SUBSTANCE: undercoat for anticorrosion coatings possessing improved adhesion features and anticorrosion protection of aluminium and magnesium alloys and steels is proposed. Undercoat comprises binder on the base of epoxy diane resin, titanium dioxide, talc used as filler, strontium chromate used as anticorrosion pigment, hardener and organic solvents wherein undercoat additionally comprises modifying agent on the base of acrylic acid, barium chromate and zinc molybdate (used as anticorrosion pigments), silica powder as filler and organosilicon amine as hardener. Undercoat comprises, mas.p.: epoxy diane resin, 100; modifying agent on the base of acrylic resin, 10-20; strontium chromate, 10-20; barium chromate, 20-40; zinc molybdate, 20-40; titanium dioxide, 20-40; talc, microtalc, 25-40; silica powder, 5-12; hardener on the base of organosilicium amines, 30-50; organic solvents, 400-600. EFFECT: improved properties.