Super Durable Isocyanate Polyester Resin 84/16 Saturated Polyester Resins For Powder Coatings
Saturated Polyester Resins, 84/16 Isocyanate Polyester Resin for Powder Coatings
◎Introduction
NH7809 is a hydroxylated polyester resin for polyester/isocyanate powder coating system.
Powder coatings made of hydroxy polyester resins are also known as super durable powder coatings because of their excellent weather resistance and outdoor durability.
With the continuous development of the national economy and the continuous improvement of people's living standards, the requirements for the decoration, weather resistance, chemical resistance, water resistance and fouling resistance of coatings are getting higher and higher. Therefore, the demand for super durable powder coatings is increasing day by day.
◎Basic Features
Excellent leveling
Excellent outdoor durability
Good mechanical properties
Good chemical resistance
◎Recommend Formulation:
| NH7809 | Hardener | Filler ＆ pigment | Leveling agent | Benzoin |
| 200 | 40 | 125 | 4.5 | 2.5 |
◎Specifications I
| Appearance | White or pale yellow transparent flake |
| Color (50% DMF) | max:2 |
| Hydroxyl Value (mgKOH/g) | 25～35 |
| Softening Point (℃) | 102～112 |
| Glass Transition Temp. (℃) | ～66 |
| Melting Viscosity (200℃, cone/plate, mPa·s) | 12000±2000 |
| Reactivity at 180℃ (s, 17% B1530) | 520±100 |
| Curing Requirement | 200℃×15 min |
| Packaging | PE Bags, Net Weight 25kg ± 0.1kg / bag |
◎Specifications II
| 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 | |
| Film Properties | Gel Time (180℃, sec) | 600~850 |
| Horizontal Flow (180℃, mm) | 27~32 | |
| Gloss (60°) | ≥85% | |
| Bending (φ1mm) | Pass | |
| Adhesive (1mm, grade) | 0 | |
| Pencil Hardness | ≥1H | |
| Impact (50cm) | pass | |
◎More Code
| Code | Ratio | Cure Cycle | Acid Value (mgKOH/g) | Viscosity (mPa.s/200℃) | Tg (℃) | Reactivity (s/180℃) | Properties |
| NH7401 | 40/60 | 200℃×15 min | 280~320 | 7000~11000 | ~55 | 130-250 | High hydroxyl value resin. For one shot matt PU formulations with NH7805. |
| NH7405 | 40/60 | 200℃×15 min | 280~320 | 3000~5000 | ~55 | 120-240 | High hydroxyl value super durable resin. For one shot matt PU formulations wit NH7803. |
| NH7603 | 65/35 | 200℃×15 min | 90~120 | 3000~6000 | ~59 | 110-210 | Excellent flow and good solvent resistance. |
| NH7803 | 80/20 | 200℃×15 min | 35~45 | 3000~5000 | ~57 | 300-420 | Low hydroxyl value super durable resin. For one shot matt PU formulation with NH7405. |
| NH7805 | 80/20 | 200℃×20 min | 35~45 | 3500~6500 | ~61 | 240-400 | Excellent flow, good mechanical properties, good outdoor durability. |
| NH7807 | 84/16 | 200℃×15 min | 27~33 | 9500~10500 | ~62 | 300-400 | Good flow and stain resistance. |
| NH7808 | 84/16 | 200℃×15 min | 25~35 | 7500~10500 | ~59 | 460-660 | Excellent flow, good mechanical properties and outdoor durability. |
| NH7809 | 84/16 | 200℃×15 min | 25~35 | 9000~13000 | ~66 | 420-620 | Outstanding mechanical properties, excellent outdoor durability. For architectural profile and home appliance filed. |
| NH7908 | 88/12 | 200℃×15 min | 20~25 | 9000~12000 | ~57 | 350-580 | For low hardener demand formulation. Good flow and mechanical properties. |
◎Remarks: All the polyester resins could be customized to Non-tin (A), anti gas burners (G), tribo gun (T) and anti-blooming (F).
◎Product Show
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.