Isocyanate Polyester Resin with Good Solvent Resistance
◇ Applications:
NH7603 is a hydroxylated polyester resin for polyester/isocyanate powder coating system.
The balance between high leveling, high weather resistance and mechanical properties of powder coating was solved through the design of product molecular structure, the screening of monomers and new additives.
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.
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 leveling
Good solvent resistance
◇ Specifications:
Appearance White or pale yellow transparent flake
Color (50%DMF): max: 2
Hydroxyl Value(mg KOH/g): 90～120
Softening point(℃): 101～110
Glass transition temp.(℃): ～59
Melting viscosity(200℃, cone/plate, mPa·s): 4500±1500
Reactivity at 180℃(s, 35% B1530): 160±50
◇ Recommend Formulation:
| NH7603 | B 1530 | Filler ＆ pigment | Leveling agent | Benzoin |
| 432 | 227 | 328 | 10 | 3 |
◇ 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
Film thickness: 50～70μm
Degreased cold-rolled steel 0.5mm
◇ Curing Requirement: 200℃×15min
◇ Film Properties:
Gel time(180℃,sec) 200~400
Horizontal flow(180℃),mm 26~30
Gloss(60°): ≥80%
Bending(φ1mm): Pass
Adhesive(1mm,grade): 1
Pencil hardness ≥1H
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)
Product Tags:
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Qualicoat 65/35 Clear Polyester Resin For Powder Coating Anti Corrosion Images
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