Two-Component Waterborne Epoxy Anti-Corrosion Primer, Grey
Based on Beckopox™ EP 386w/52WA & Beckopox VEH 2188w/55WA
REC20052 is a starting-point formulation for a two-component (2K), water-reducible grey epoxy anti-corrosion primer. It pairs the allnex Beckopox™ EP 386w/52WA waterborne epoxy resin with the Beckopox VEH 2188w/55WA amine hardener to deliver a low-VOC, calcium-borosilicate-pigmented primer for industrial corrosion protection on steel.
- ~67%Solids A+B
- ~75VOC g/L
- ~35%PVC
- 1.8:1Pigment : binder
- ~5000Visc. A+B mPa·s
Formulation
| Raw material | Weight | Function | Supplier |
|---|---|---|---|
| Part A – Stage I | |||
| Beckopox EP 386w/52WA | 40.30 | Epoxy resin | allnex |
| Additol® VXW 6394 | 0.90 | Dispersing additive | allnex |
| Additol VXW 6393 | 0.30 | Defoamer | allnex |
| Deionized water | 8.10 | – | – |
| Part A – Stage II | |||
| Microtalc IT Extra | 3.30 | Filler | Elementis |
| Plastorit 0000 | 3.30 | Filler | Imerys |
| Kronos 2190 | 16.50 | Pigment | Kronos |
| Bayferrox 3920 | 0.25 | Pigment | Lanxess |
| Bayferrox 306 | 0.95 | Pigment | Lanxess |
| Halox SW-111 | 6.70 | Anti-corrosion | ICL/Advanced Additives |
| Baryt EWO | 18.10 | Filler | Deutsche Baryt Industrie |
| Part A – Stage III | |||
| Texanol Ester Alcohol | 0.60 | Coalescent solvent | Eastman |
| Additol VXW 6388 | 0.70 | Rheology control | allnex |
| Total Part A | 100.00 | ||
| Part B | |||
| Beckopox VEH 2188w/55WA | 11.50 | Amine hardener | allnex |
| Deionized water | 3.50 | – | – |
Combine the two components only shortly before application and adjust the viscosity with deionized water. Previous reference: IB 114/7.
Processing
- Pre-mix stage A-I and add pigments / fillers Mix Part A-I in the stated order. Add pigments and fillers (Part A-II) and disperse on a dissolver for 10 min at 3000 rpm/min.
- Pearl-mill the mill base Disperse on a pearl mill with zirconium oxide pearls (1 mm) for 30 min at 3000 rpm/min. The mill base temperature should not exceed 40 °C. Add Part A-III to the mixture of parts A-I and A-II.
- Combine the two components and apply Mix Part A and Part B shortly before application and adjust the viscosity with deionized water.
Calculated parameters
- Solids content, Part A
- approx. 71 %
- Solids content, Part A + Part B
- approx. 67 %
- Amine / epoxy crosslink ratio
- approx. 0.75 / 1
- Pigment / binder ratio
- approx. 1.8 / 1
- Pigment volume concentration
- approx. 35 %
- VOC content
- approx. 75 g/l (excluding water)
Measured parameters
- Dynamic viscosity, Part A (DIN EN ISO 3219, 23 °C, 25 s⁻¹)
- approx. 3500 mPa·s
- Dynamic viscosity, Part A + B (DIN EN ISO 3219, 23 °C, 25 s⁻¹)
- approx. 5000 mPa·s