Kinte Materials Science and Technology Co.,Ltd
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Polyester Resin Isocyanate 80/20 for PU wrinkle powder coating
Applications:
NH7805 is a hydroxylated polyester resin for polyester/isocyanate powder coating system
Basic features:
Excellent leveling
Good chemical resistance and mechanical properties
High weathering resistance
Suitable for polyurethane powder coatings
Specifications:
Appearance White or pale yellow transparent flake
Color (50%DMF): max: 2
Hydroxyl Value(mg KOH/g): 35～55
Softening point(℃): 102～112
Glass transition temp.(℃): ～61
Melting viscosity(200℃, cone/plate, mPa·s): 5000±1500
Reactivity at 180℃(s, 20% B1530): 320±80
Recommend Formulation:
| NH7805 | Hardener | Filler ＆ pigment | Leveling agent | Benzoin |
| 523 | 130 | 334 | 10 | 3 |
Extrusion Condition:
Two-screw extruder
Zone I: 90～110℃ Zone II: 110～120℃
Speed of revolution: 500～1200rpm
Fineness of powder: ＜100μm
Application Condition:
Electrostatic spraying with: 40～70KV
Film thickness: 50～70μm
Degreased cold-rolled steel 0.5mm
Curing Requirement: 200℃×20min
Film Properties:
Gel time(180℃,sec) 660~930
Horizontal flow:(180℃), mm: 29~33
Gloss(60°): ≥85%
Bending(φ1mm): Pass
Adhesive(1mm,grade): 0
Pencil hardness ≥1H
Direct Impact (50cm): pass
Packaging:PE bags, N.W. 25KG±0.1KG / bag
