NH7603 is a hydroxylated polyester resin for polyester/isocyanate powder coating system.
Basic features:
-Good solvent resistance
-Excellent leveling
Specifications:
Appearance |
White or pale yellow transparent flake |
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Color(50%DMF) |
max:2 |
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Hydroxyl Value(mgKOH/g) |
90~120 |
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Softening point(℃) |
101~110 |
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Glass transition temp(℃) |
~59 |
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Melting viscosity(200℃,cone/plate,mPa·s) |
4500±1500 |
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Reactivity at 180℃(s,B1530) |
160±50 |
Recommend Formulation:
HH-7603 |
B1530 |
Filler & pigment |
Leveling agent |
Benzoin |
432 |
227 |
328 |
10 |
3 |
Extrusion Condition:Two-screw extruder
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℃*15min
Film Properties:
Gloss(60°) |
>=8% |
Pencil hardness |
>=1H |
Gel time(180℃,sec) |
200~400 |
Horizontal flow(180℃),mm |
26~30 |
Bending(φ 1mm) |
Pass |
Adhesive(1mm,grade) |
1 |
Direct Impact(50cm) |
Pass |
Packaging:PE bags, N.W. 25KG±0.1KG / bag