Kinte Materials Science and Technology Co.,Ltd
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Isocyanate Polyester Resin One-time Extrusion for Matte PU Powder Coating
◇ Applications:
NH7405/NH7803 are saturated carboxyl polyester resins for low gloss or matte polyester/isocyanate powder coatings by one shot extrusion.
◇ Basic features:
Excellent weathering resistance
Good chemical resistance
Good film appearance
Suitable for matt or low gloss powder coating
◇ Specifications:
NH7405 NH7803
Appearance pale yellow flake pale yellow flake
Color(50%DMF): ≤2 ≤2
Hydroxyl Valu((mgKOH/g): 280～320 35～45
Softening point(℃): 102～112 102～112
Glass transition temp.( ℃): ~55 ~57
Melting viscosity: 3000~5000 3000~5000
(200℃, cone/plate, mPa·s)
Reactivity at 180℃(s, B1530): 120~240 300~420
◇ Recommend Formulation:
| NH7405 | NH7803 | B1530 | TiO2 | BaSO4 | Leveling agent | Benzoin |
| 137 | 205 | 257 | 205 | 183 | 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
Coating film thickness: 50～80μm
Degreased cold-rolled steel 0.5mm
◇ Curing Requirement: 200℃×15min
◇ Film Properties:
Gloss(60°): ≤20%
Pencil hardness: ≥ 3H
◇ Packaging:PE bags, N.W. 25KG±0.1KG / bag
Remarks:all the polyester resins could be customizes to Non-tin (A) ,anti gas burners(G),tribo gun(T) and anti-blooming(F)
