| 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...veja mais 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. veja menos | |
| 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...veja mais 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. veja menos | |
| Water-borne Styrene-Acrylic Primer (Acronal) (Formulation #3.4) | GRACE | Water-borne Styrene-Acrylic Primer (Acronal) (Formulation #3.4) is a guideline formulation for general industrial applications. Acronal S760 is a self cross-linking styrene-acrylic dispersion which can be cured at room temperature by the addition of acid ...veja mais Water-borne Styrene-Acrylic Primer (Acronal) (Formulation #3.4) is a guideline formulation for general industrial applications. Acronal S760 is a self cross-linking styrene-acrylic dispersion which can be cured at room temperature by the addition of acid catalysts. Pre-neutralisation of Cycat 500 and phosphoric acid with AMP 95 and ammonia is necessary to ensure paint stability. The addition of AMP 95 also helps to heat stabilise the paint during milling. Higher PVC-values reduce the salt spray performance, and values around 20 to 30 vol.-% are suggested. Alternative fillers such as talcs, calcium carbonates (Millicarb B from Omya) or dolomites (Microdol extra from Norwegian Talcs) or combinations thereof can be used satisfactorily. veja menos | |
| 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 a...veja mais 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. veja menos | |
| 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...veja mais 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. veja menos | |
| 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...veja mais 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. veja menos |
