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Physical extinction Epoxy&Polyester Resin for low gloss powder paint
◇ Applications:
HH2583 is a carboxyl polyester resin designed for 50/50 hybrid powder coatings with low gloss.
Advantages of powder coatings
1. Health and environmental protection
All kinds of liquid chemical harmful film-forming, dispersion, wetting, leveling, anti-corrosion and anti mildew additives added to achieve coating performance are omitted.
2. Convenient transportation and storage
Ordinary coatings contain about 20-50% water or solvent, while powder coatings are completely solid without water or solvent, which is convenient and safe for transportation. In addition, coatings containing water or solvent tend to freeze when the transportation and storage temperature is lower than 0 ℃. This problem does not exist in powder coatings.
3. No preservative is required
In the traditional liquid coating, there is both water and bacterial food, which is easy to be polluted by bacteria. Therefore, in order to prevent deterioration, preservatives should be added, while latex powder coatings have no bacterial pollution and do not need preservatives
4. Paint smell
Compared with the general traditional coating smell residue, this coating can disperse quickly, which can be said to disappear immediately.
◇ Basic features:
Excellent extinction performance
Good mechanical properties
Good storage stability
Not suitable for high gloss coating.
◇ Specifications:
Appearance white or light yellow transparent flakes
Color(50%DMF) max:3
Acid number(mgKOH/g): 69~75
Softening point(℃) 93~103
Glass transition temp.( ℃) ~53
Melting viscosity(200℃, cone/plate, mPa·s): 3500~5500
Reactivity at 180℃(s, 50% Epoxy): 150~250
◇ Recommend Formulation:HH-2583—E12
HH-2583 | E12 | Filler & pigment | Leveling agent | Benzoin | Carbon black | Matting agent |
270 | 270 | 384 | 10 | 4 | 6 | 48 |
◇ 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: 50~100μm
Degreased cold-rolled steel 0.5mm
◇ Curing Requirement: 180℃×15min. or 200℃×20min.
◇ Film Properties:
Gel time(180℃,sec): 50~150
Horizontal flow:(180℃),mm: 20~24
Gloss(60°): ≤10%
Bending(φ1mm): pass
Adhesive(1mm,grade): 0
Pencil hardness: 1H
Impact(50cm): +50, -40
Remarks:all the polyester resins could be customizes to Non-tin (A) ,anti gas burners(G),tribo gun(T) and anti-blooming(F)