NH-7807 is a Hydroxylated polyester resin for polyester/isocyanate powder coating system.
Basic features:
-High weathering resistance
-Excellent mechanical properties
-Excellent leveling
-Good solvent resistance
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) |
27~33 |
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Softening point(℃) |
105~115 |
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Glass transition temp(℃) |
~62 |
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Melting viscosity(200℃,cone/plate,mPa·s) |
10000±500 |
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Reactivity at 180℃(s,16.7%B1530) |
350±50 |
Recommend Formulation:
HH-7807 |
Hardener |
Filler & pigment |
Leveling agent |
Benzoin |
523 |
130 |
334 |
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℃*20min
Film Properties:
Gloss(60°) |
<=20% |
Pencil hardness |
>=3H |
Gel time(180℃,sec) |
500~600 |
Horizontal flow(180℃),mm |
27~31 |
Bending(φ1mm) |
Pass |
Adhesive(1mm,grade) |
0 |
Direct Impact(50cm) |
Pass |
Packaging:PE bags, N.W. 25KG±0.1KG / bag