HAA Polyester Resin NH6381&NH6688 for 30% Low Gloss Powder Coating
◇ Applications:
NH6381/NH6688 are saturated carboxyl polyester resins for low gloss polyester/primid powder coatings by dry blending procedure.
◇ Basic features:
Low gloss film
Excellent mechanical properties
Good leveling, good storage stability
Good chemical resistance, fine anti-yellowing
◇ Specifications:
NH6381 NH6688
Appearance: pale yellow flakes pale yellow flakes
Color(50%DMF): ≤3 ≤3
Acid number (mgKOH/g): 47～54 19～24
Softening point(℃): 98～118 100～110
Glass transition temp.( Tg,℃): ~56 ~58
Melting viscosity: 2800±1000 5600±800
(200℃, cone/plate, mPa·s)
Reactivity at 180℃(s, XL-552): 90±30 250±30
◇ Recommend Formulation:
| Formulation | NH6381 | NH6688 | XL-552 | Filler ＆ pigment | Leveling agent | Benzoin |
| I | 200 | — | 15 | 150 | 2.4 | 1.2 |
| II | — | 200 | 7.5 | 150 | 2.4 | 1.2 |
◇ Extrusion Condition:
Two-screw extruder
Zone I: 90～110℃ Zone II: 110～120℃
Speed of revolution: 500～1200rpm
Fineness of powder: ＜100μm
Blending Extrudate I and II with weight ratio 1:1 before grinding.
◇ Application Condition:
Electrostatic spraying with: 40～70KV
Coating film thickness: 50～80μm
Degreased cold-rolled steel 0.5mm
◇ Curing Requirement: 180℃×15min
◇ Film Properties:
Gloss(60°): ≤40%
Bending(φ2mm): pass
Adhesive(1mm,grade): 0
Pencil hardness: ≥ 1H
Direct Impact Resistance: pass 50kg·cm
◇ 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)
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HAA Dyt Blended Polyester Resin for low gloss powder coatings Images
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