Kinte Materials Science and Technology Co.,Ltd
Details make classics, and quality achieves future
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Durable polyester resin for dry-blended powder coating in low temperature curing
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.( ℃): ~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
Kinte is the first manufacturer in China to research and produce prepainted coating for spraying equipments.
Continuous fast production speed can reach 80m/min which surpasses the same kind of Euramerican with 40m/min. Our technology ranks tops in China and is in advanced level all over the world.
