Two-Component Waterborne Epoxy Concrete Coating with Low VOC
Based on Beckopox™ EH 623w/80WA, Beckopox EP 2384w/57WA & Beckopox EP 147w
REC21004 is a starting-point formulation for a two-component (2K), water-reducible epoxy concrete coating with low VOC. It pairs the allnex Beckopox™ EH 623w/80WA waterborne amine resin with the Beckopox EP 2384w/57WA and Beckopox EP 147w epoxy hardeners to deliver a low-VOC, air-drying coating for concrete and mineral substrates.
- ~55%Solids by wt.
- ~46VOC g/L
- ~16%PVC
- 1 : 1Amine / epoxy
- ~17.7Yield m²/L
Formulation
| Raw material | Weight | Function | Supplier |
|---|---|---|---|
| Part A-I | |||
| Deionized water | 16.20 | – | – |
| Additol® VXW 6208/60 | 1.62 | Dispersing additive | allnex |
| BYK-024 | 0.10 | Defoamer | BYK |
| Part A-II | |||
| Tiona 595 | 16.20 | Pigment | Tronox |
| Imsil A-10 | 16.20 | Filler | Sibelco |
| Part A-III | |||
| Beckopox™ EH 623w/80WA | 25.60 | Amine resin | allnex |
| Deionized water | 18.90 | – | – |
| Part A-IV | |||
| Deionized water | 3.65 | – | – |
| BYK-024 | 0.10 | Defoamer | BYK |
| Chroma-Chem 896-9901 Lamp Black | 1.08 | Colourant | Chromaflo |
| Additol VXW 6503 N | 0.35 | Flow / substrate wetting | allnex |
| Total Part A | 100.00 | ||
| Part B-I | |||
| Beckopox EP 2384w/57WA | 47.70 | Epoxy hardener | allnex |
| Deionized water | 8.21 | – | – |
| Part B-II | |||
| Beckopox EP 147w | 12.35 | Epoxy hardener | allnex |
| Arcosolv PNP | 2.78 | Coalescing solvent | LyondellBasell |
| Total Part B | 71.04 | ||
Previous reference: US1586. Combine Part A and Part B only shortly before application.
Processing
- Prepare the mill base (Part A-I and A-II) Mix all components of Part A-I in the stated order, then add the components of Part A-II in the stated order and homogenize for 3–10 minutes.
- Grind and incorporate the amine resin (Part A-III) Grind until Hegman 6. Premix Part A-III (Beckopox™ EH 623w/80WA with deionized water) and add to the mill base.
- Complete Part A (Part A-IV) Add the components of Part A-IV in the stated order to complete Part A.
- Prepare Part B Premix Part B-I (Beckopox EP 2384w/57WA with deionized water), then add Part B-II (Beckopox EP 147w with Arcosolv PNP) in the stated order to complete Part B.
- Combine the two components and adjust Mix Part A and Part B shortly before application and adjust the viscosity with deionized water.
Calculated parameters
- Solids content, Part A + B, by weight
- approx. 55 %
- Solids content, Part A + B, by volume
- approx. 45 %
- Amine / epoxy crosslink ratio
- approx. 1 / 1
- Pigment / binder ratio
- approx. 0.54 / 1
- Pigment volume concentration (PVC)
- approx. 16 %
- VOC content (excluding water)
- approx. 46 g/l
Application
- Drying conditions
- air dry – room temperature
- Yield, 25.4 µm dry
- approx. 17.7 m²/liter