WATERBORNE WHITE DTM based on MAINCOTE HG100 WITH ASCONIUM-142DA

This waterborne white direct-to-metal (DTM) coating formulation is designed for long-term protection of cold-rolled steel, providing effective performance in salt-spray conditions.

Key Components:

• Deionized Water: Solvent
• Tegodisperse 750W: Dispersing agent
• AMP 90: Neutralizer
• BYK 024: Defoamer
• DPnB: Co-solvent
• Tafigel PUR 85: Thickener
• KRONOS 2190: Titanium dioxide (white pigment)
• Durcal 5: Calcium carbonate (extender)
• Asconium-142DA: Anticorrosion additive
• Maincote HG100: Binder
• Ascotran-H10: Flash-rust inhibitor
• Acrysol RM845: Thickener

Preparation Steps:

Step 1: Mill-Base Preparation

1. Add deionized water, dispersing agent, neutralizer, defoamer, co-solvent, thickener, titanium dioxide, and calcium carbonate to the mill-base tank with good agitation.
2. Disperse with high shear mixing for 10-15 minutes and set aside.

Step 2: Premix Preparation

1. Mix anticorrosion additive and neutralizer separately while stirring, then set aside.

Step 3: Let-Down Stage

1. In the let-down tank, progressively add the binder, premix from Step 2, defoamer, deionized water, co-solvent, flash-rust inhibitor, and the mill-base from Step 1 with continuous stirring.
2. Add the final thickener and ensure thorough mixing.

Performance Testing:

• Salt-Spray Test: 500 hours on cold-rolled steel, 70 µm dry film thickness (DFT)