| Water-borne Vinyl Acrylic Dispersion Primer (Formulation #3.2) | GRACE | 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 pigment...view more 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. view less | |
| 2-Component Wash Primer With Improved Adhesion (Formulation #4.1.2) | GRACE | 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 wit...view more 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. view less | |
| Waterborne Alkyd Emulsion Primer (Resydrol) (Formulation #3.1.2) | GRACE | Waterborne Alkyd Emulsion Primer (Resydrol) (Formulation #3.1.2) is a guideline formulation for general industrial applications. Resydrol 4333 is a water-thinnable modified alkyd emulsion neutralised by ammonia and containing a small amount of cosolvent (2.5 wt.-% on total formulation). Borchigel L 75, a diurethane thickening agent, is needed to stabilise the viscosity during storage. The combination of SHIELDEX® anti-corrosive pigment...view more Waterborne Alkyd Emulsion Primer (Resydrol) (Formulation #3.1.2) is a guideline formulation for general industrial applications. Resydrol 4333 is a water-thinnable modified alkyd emulsion neutralised by ammonia and containing a small amount of cosolvent (2.5 wt.-% on total formulation). Borchigel L 75, a diurethane thickening agent, is needed to stabilise the viscosity during storage. The combination of SHIELDEX® anti-corrosive pigments with Alcophor 827 leads to synergistic effects in the corrosion resistance of the primer. view less | |
| Waterborne Styrene-Butadiene Primer (Bayhydrol) (Formulation #3.3) | GRACE | Waterborne Styrene-Butadiene Primer (Bayhydrol) (Formulation #3.3) is a guideline formulation for general industrial applications. Bayhydrol B130 is a water thinnable styrene-butadiene emulsion modified with maleinised oil and neutralised with a mixture of triethylamine and ammonia. Little or no cosolvent is necessary for this resin. The combination with Lipaton SB 5521, styrene-butadiene dispersion leads to improved film properties (higher flexibility and overcoatability) and water resistance. The addition level of zinc oxide is optimum at 1 wt.-%, and is recommended in combination with SHIELDEX® AC 5 anti-corrosive pigment...view more Waterborne Styrene-Butadiene Primer (Bayhydrol) (Formulation #3.3) is a guideline formulation for general industrial applications. Bayhydrol B130 is a water thinnable styrene-butadiene emulsion modified with maleinised oil and neutralised with a mixture of triethylamine and ammonia. Little or no cosolvent is necessary for this resin. The combination with Lipaton SB 5521, styrene-butadiene dispersion leads to improved film properties (higher flexibility and overcoatability) and water resistance. The addition level of zinc oxide is optimum at 1 wt.-%, and is recommended in combination with SHIELDEX® AC 5 anti-corrosive pigments in this case. view less | |
| 1- Or 2-Component Wash Primer (Formulation #4.1.1) | GRACE | 1- Or 2-Component Wash Primer (Formulation #4.1.1) is a guideline formulation used to exhibit the equivalent performance for SHIELDEX® anti-corrosive pigments compared to a commercial wash primer based on zinc tetroxychromate. The modified epoxy resin Beck...view more 1- Or 2-Component Wash Primer (Formulation #4.1.1) is a guideline formulation used to exhibit the equivalent performance for SHIELDEX® anti-corrosive pigments compared to a commercial wash primer based on zinc tetroxychromate. The modified epoxy resin Beckopox EM 460 is recommended in combination with the standard polyvinylbutyral 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. The formulation can also be used as a one-component system. In this case, Part B is premixed and subsequently added to part A after dispersion. 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 microns by bar coater. The formulation was also tested with a 40 micron acrylic/isocyanate top coat. view less |
