Powder coating resins for HAA cure low gloss matt dry blend Polyester Resin NH6381/NH6688
Applications:
NH6381/NH6688 are saturated carboxyl polyester resins for low gloss polyester/primid powder coatings by dry blending procedure.
The coating is prepared by mixing resin, pigment and filler, curing agent and other additives in a certain proportion, and then by hot extrusion, crushing and screening. They are stored stably at room temperature. After electrostatic spraying or fluidized bed dip coating, they are heated, baked, melted and solidified to form a flat and bright permanent film, so as to achieve the purpose of decoration and anti-corrosion.
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.( ℃): ~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 | T-105 | 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
Product Tags:
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96:4 HAA Curing Dry Blend Polyester Matt Good Toughness white Images
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