Kinte Materials Science and Technology Co.,Ltd
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Dry Blended Polyester Resin for Super Durable Matte Powder Coating
◇ Applications:
NH9001/NH9508 are saturated carboxyl polyester resins for low gloss polyester/TGIC powder coatings by a 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:
Excellent leveling
Excellent weathering resistance
Excellent mechanical properties
Good chemical resistance
Good storage stability
◇ Specifications:
NH9001 NH9508
Appearance: pale yellow flake pale yellow flake
Color(50%DMF): ≤3 ≤2
Acid number(mgKOH/g): 46～54 19～25
Softening point(℃): 103～113 103～113
Glass transition temp.( ℃): ~65 ~63
Melting viscosity: 5100±800 5000±500
(200℃, cone/plate, mPa·s)
Reactivity at 180℃(s, TGIC): 50±25 330±60
◇ Recommend Formulation:
| Formulation | NH9001 | NH9508 | TGIC | Filler ＆ pigment | Leveling agent | Benzoin |
| I | 270 | — | 30 | 200 | 3 | 1.5 |
| II | — | 270 | 14 | 200 | 3 | 1.5 |
◇ Extrusion Condition:
Two-screw extruder
Zone I: 90～110℃ Zone II: 110～120℃
Speed of revolution: 500～1200rpm
Fineness of powder: ＜100μm
Blend I and II in the weight ratio of 1:1 before grinding.
◇ Application Condition:
Electrostatic spraying with: 40～70KV
Coating film thickness: 50～70μm
Degreased cold-rolled steel 0.5mm
◇ Curing Requirement: 200℃×10min
◇ Film Properties:
Gloss(60°): ≤40%
Bending(φ1mm): Pass
Adhesive(1mm,grade): 0
Pencil hardness: ≥2H
Direct Impact (50cm): pass
◇ 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)
