Acrylic polyurethane anti-corrosion primer (2K) for steel in harsh service.
Vehicles, ships, bridges, structural steel.
Mix 16:4; pot life 4 h at 25℃.
Resists solvents, chemicals, and damp-heat exposure.
Overview
Two-component acrylic polyurethane anti-corrosion primer for steel substrates on vehicles, ships, bridges, and steel structures where mechanical strength and chemical resistance are required.
Performance focus: adhesion and hardness with anti-rust protection, plus resistance to damp-heat, solvents, and chemicals.
Composition
Part A: hydroxyl acrylic resin with iron red, anti-rust pigments, and additives.
Part B: polyisocyanate curing agent.
Typical uses
Anti-rust primer for automobiles, construction machinery, mining machinery, ships, bridges, and steel structures.
Technical data (typical)
Color: various colors.
Theoretical consumption: 0.11 kg/m² at 35 µm DFT (loss not included).
Density: 1.37 kg/L.
Drying time (25℃): surface dry ≤0.5 h; hard dry ≤7 h; full cure 7 d.
Application data (25°C)
Mixing ratio (Part A:Part B): 16:4.
Induction time: 5 min.
Pot life: 4 h.
Application methods: airless spray, brush.
Thinner: dedicated thinner, 2–8% (higher for air spray/roller).
Recoat interval: min 8 h; max 7 d.
Recommended coats/DFT: 1 coat 40–60 µm; brush/roller 1 coat 30–45 µm.
Recommended system: acrylic polyurethane primer + acrylic polyurethane intermediate coating + acrylic polyurethane enamel coating.
Application conditions: RH ≤85%; 5–35℃; avoid rain/snow, strong wind (>6.7 m/s), heavy fog, intense sunlight.
Surface preparation
Blast-clean to Sa 2.5 or power-tool clean to St 3; surface profile 30–75 µm.
System compatibility / packing / storage
Compatibility: used with acrylic polyurethane intermediate coating and acrylic polyurethane enamel coating.
Packing: Part A 16 kg; Part B 4 kg.
Storage: shelf life 12 months.
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