2-Component Wash Primer With Improved Adhesion (Formulation #4.1.2) is a guideline formulation offered to illustrate the key features of SHIELDEX® AC 3 Anti-Corrosive Pigment. Beckopox EM 460 together with Phenodur PR 263 is recommended in combination with the standard resin Mowital B 30 H to ensure good wet adhesion properties. Silquest A 187 Silane promotes wet adhesion properties especially on galvanised steel and aluminium substrates. The combination of Alcophor 827 with SHIELDEX® anti-corrosive pigments improves hot salt spray resistance over steel substrates.
After mixing the two components and letting these prereact for a minimum of 30 minutes, the formulation was tested on solvent degreased cold rolled steel, galvanised steel and aluminium substrates applied to a dry film thickness of 10 –15 μm by bar coater. The formulation was also tested with a 40 micron acrylic/isocyanate top coat. Drying was for 7 days at ambient conditions.
GRACE Davison is a division of W.R. Grace & Co., a world leader in specialty chemicals, with specialization in silica and silica alumina technology. Grace Davison silica products have successfully been used for many years as performance enhancing additives for diverse Coatings applications, ranging from industrial coil and wood coatings applications to high quality architectural coatings.
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