Water-borne Vinyl Acrylic Dispersion Primer (Formulation #3.2) is a guideline formulation offered to show reduced blistering and wet dispersion loss at the scribe compared to a control bank. Haloflex 202 is a water thinnable vinyl-acrylic dispersion with an acidic pH. The addition of Alcophor 827 is beneficial in two respects: the pH is stabilised at 6.5 which would otherwise be buffered by SHIELDEX® anti-corrosive pigments, and it also improves the corrosion resistanceafter hot salt spray and humidity exposure. The addition level of SHIELDEX® anti-corrosive pigments should not exceed 3 wt.-% to ensure that the pH of the final formulation does not exceed 7.
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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