Two-Component Waterborne Epoxy Primer for Smooth & Pretreated Metal Substrates
Based on Beckocure® EH 2261w/41WA & Beckopox™ EP 2384w/57WA
REC19012 is a starting-point formulation for a two-component (2K), water-reducible epoxy primer for smooth and pretreated metal substrates. It pairs the allnex Beckocure® EH 2261w/41WA amine resin with the Beckopox™ EP 2384w/57WA epoxy hardener to deliver a very low-VOC anticorrosive primer for industrial metal protection.
- ~65%Solids A+B
- ~26VOC g/L
- ~30%PVC
- ~2:1Part A : B
- ~1.5 hPot life
Formulation
| Raw material | Weight | Function | Supplier |
|---|---|---|---|
| Part A | |||
| Deionized water | 11.50 | – | |
| Additol® VXW 6208 | 3.36 | Dispersing additive | allnex |
| Additol VXW 6393 | 0.10 | Defoamer | allnex |
| Microtalc IT extra | 8.70 | Filler | Mondo Minerals |
| Kronos 2190 | 20.97 | Pigment | Kronos |
| Bayferrox 3920 | 0.43 | Pigment | Lanxess |
| Bayferrox 306 | 1.15 | Pigment | Lanxess |
| Baryt EWO | 23.61 | Filler | Deutsche Baryt Industrie |
| Additol VXW 6393 | 0.05 | Defoamer | allnex |
| Texanol Ester Alcohol | 0.61 | Coalescent solvent | Eastman |
| Additol VXW 6388 | 0.61 | Rheology control | allnex |
| Methoxypropanol | 1.02 | Co-solvent | – |
| Beckocure® EH 2261w/41WA | 27.90 | Amine resin | allnex |
| Total Part A | 100.00 | ||
| Part B | |||
| Beckopox™ EP 2384w/57WA | 41.79 | Epoxy hardener | allnex |
| Total (Part A + Part B) | 141.79 | ||
Mixing ratio is Part A : Part B = approx. 2 : 1 by weight. Combine the two components only shortly before application.
Processing
- Mix the components I Mix all components I of Part A (deionized water, Additol® VXW 6208 and Additol VXW 6393) in the stated order and mix.
- Add components II and homogenize Add components II (Microtalc IT extra, Kronos 2190, Bayferrox 3920, Bayferrox 306 and Baryt EWO) in the stated order and homogenize for 3–10 minutes.
- Grind on a pearl mill Grind 45–60 minutes on a pearl mill.
- Complete the paste Add step by step parts III, IV and V (defoamer, coalescent solvent, rheology control, methoxypropanol and Beckocure® EH 2261w/41WA) to complete the paste.
- Combine the two components and adjust Mix Part A and Part B (Beckopox™ EP 2384w/57WA) shortly before application and adjust the viscosity with deionized water.
Calculated parameters
- Solids content, Part A
- approx. 68 %
- Solids content, Part A + B
- approx. 65 %
- VOC content, Part A + B
- approx. 26 g/L
- Part A / B ratio
- approx. 2 : 1 by weight
- Amine / epoxy crosslink ratio
- approx. 0.5 : 1
- Pigment / binder ratio
- approx. 1.6 : 1
- Pigment volume concentration (PVC)
- approx. 30 %
Measured parameters
- Pot life (viscosity double time)
- approx. 1.5 hours