Kinte Materials Science and Technology Co.,Ltd
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Epoxy Polyester for Aluminum car rim Powder Coating
◇ Applications:
HH2685 is a carboxyl polyester resin designed for 60/40 hybrid powder coatings.
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, high gloss
Good chemical performance and mechanical properties
Good storage stability
◇ Specifications:
Appearance White or light yellow transparent flakes
Color(50%DMF): max:3
Acid number(mgKOH/g) 48～54
Softening point(℃) 100～110
Glass transition temp.( ℃) ～55
Melting viscosity(200℃, cone/plate, mPa·s): 3200±500
Reactivity at 180℃(s, 40% Epoxy): 250±50
◇ Recommend Formulation:HH2685—E12
| HH2685 | E12 | Filler ＆ pigment | Leveling agent | Benzoin |
| 180 | 120 | 105 | 4 | 2 |
◇ 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: 50～70μm
Degreased cold-rolled steel 0.5mm
◇ Curing Requirement: 180℃×20min
◇ Film Properties:
Gel time(180℃,sec) 230~360
Horizontal flow:(180℃),mm: 28~33
Gloss(60°): ≥90%
Bending(φ1mm): pass
Adhesive(1mm,grade): 0
Pencil hardness: 1H
Impact(40cm): pass
Remarks:all the polyester resins could be customizes to Non-tin (A) ,anti gas burners(G),tribo gun(T) and anti-blooming(F)
