Matt Hardener Used For Epoxy/Polyester Hybrid Powder Coatings System
Specification
Appearance: Fine white powder
Purity: ≥99%
Melting range: 200-225℃
Application
MATT HARDENER HF66 is used for pure epoxy resin, epoxy/ polyester hybrid powder coatings to achieve coatings with matt surface having excellent mechanic quality and wonderful appearance.
Physical Performance
Curing condition: 180℃ 20-25 minutes 190℃ 10-12 minutes 200℃
Recommended Formulation
| Gloss 60° | 5-6 | 20 | 40 | 70 |
| epoxy(663U) | 54.5 | 39.7 | 35.7 | 31.8 |
| Polyester(acidity:25-35mgKOH/g) | / | 14.8 | 20.8 | 26.7 |
| HF66 | 5.0 | 5.0 | 3.0 | 1.0 |
| Filler(BaSo4,CaCo3) | 40 | 40 | 40 | 40 |
| levelling agent | 0.5 | 0.5 | 0.5 | 0.5 |
| carbon black | 0.5-1 | 0.5-1 | 0.5-1 | 0.5-1 |
Notice
MATT HARDENER compatibility with resin isn’t well for its high melting point, to avoid this default it’s necessary to distribute them or to make the curing temperature at a higher level. In case of epoxypolyester hybrid powder coatings, the polyester should be low acidity. Before achieving the ideal gloss and multiple characteristics tests are needed.
