Quick Drying Acrylic Clear Coating Using Plexigum Resin
(Suitable for wood, metal, or plastic surfaces; for spray or brush application)
Typical Formulation (by weight %) – 100 kg batch
| Raw Material | Function | % w/w |
|---|---|---|
| Plexigum P28 or P55 | Acrylic binder resin | 30.0 |
| Xylene | Solvent (fast drying) | 20.0 |
| Butyl Acetate | Solvent (flow and leveling) | 20.0 |
| Methoxy Propyl Acetate | Co-solvent (reduce blushing) | 5.0 |
| Flow Additive (BYK-306) | Flow and leveling agent | 0.3 |
| Defoamer (BYK-066N) | Defoaming agent | 0.2 |
| UV Absorber (Tinuvin 1130) | UV protection | 1.0 |
| Light Stabilizer (Tinuvin 292) | HALS | 0.5 |
| Silicone Additive (optional) | Surface slip enhancer | 0.1 |
| Isobutanol | Flash off control | 3.0 |
| Additional Solvent (Toluene/Xylene mix) | Adjust viscosity | 19.9 |
Key Points:
- Plexigum P28: Fast drying, hard film; P55: More flexible, for plastic substrates.
- Final viscosity can be adjusted to 20–25 sec Ford Cup B4.
- Pot life: Stable if single pack. Can be converted to 2K if needed (with isocyanate hardener).
- Drying time: Touch dry: 10–15 min, Hard dry: <1 hour (depending on ambient conditions).
No Drier Formula
Driers (metal carboxylates like cobalt, manganese, zirconium) are used in alkyd-based systems to catalyze oxidative crosslinking with atmospheric oxygen.
In acrylic systems (like Plexigum-based clears), drying occurs by solvent evaporation, not oxidative curing. Hence:
- No drier is needed or effective.
- The film dries physically, not chemically.
- If you want chemical curing (e.g. for enhanced durability), you’d move to a 2K system with isocyanate crosslinker — not metal driers.
So, omission of drier in acrylic clear is intentional.
