NH-6503 is a saturated carboxyl polyester resin for Polyester/Primid powder coatings with super durable weatheribility.
Basic features:
-Excellent weathering resistance
-Excellent leveling
-Good anti-yellowing
Specifications:
Appearance |
White or pale yellow transparent flakes |
Color(50%DMF) |
max:2 |
Acid number(mgKOH/g) |
30~35 |
Softening point(℃) |
95~110 |
Glass transition temp(℃) |
~57 |
Melting viscosity(200℃,cone/plate,mPa·s) |
3500±500 |
Reactivity at 180℃(s,5%T-105) |
250±50 |
Recommend Formulation:
NH-6503 |
Primid XL-552 |
Filler&Pigment |
Leveling agent |
Benzoin |
701 |
703 |
566 |
34 |
380 |
8 |
4 |
4 |
4 |
Extrusion Condition:Two-screw estruder
Zone Ⅰ |
90~110℃ |
ZoneⅡ |
110~120℃ |
Speed of revolution |
500~1200rpm |
Fineness of powder |
<100μm |
Application Condition:
Electrostatic spraying with |
40~70KV |
Coating film thickness |
50~70μm |
Degreased cold-rolled steel |
0.5mm |
Curing Requirement:200℃*10min
Film Properties:
Gel time(180℃, sec) |
160~250 |
Horizontal flow:(180℃),mm |
26-28 |
Gloss(60°) |
>=88% |
Bending(φ2mm) |
pass |
Adhesive(1mm,grade) |
0 |
Pencil hardness |
>=1H |
Direct Impact(50cm) |
pass |
Packaging:PE bags, N.W. 25KG±0.1KG / bag