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Good Weather Resistance TGIC Curing Resins, Blender Polyester Resins for Matting Powder Coatings
◎Introduction
NH8002 and NH8507 are polyester resins with high and low acid value respectively, which are used in polyester/TGIC powder coating system. After NH8002 and NH8507 are respectively made into powder, they can be dry mixed to manufacture outdoor semi-gloss powder coatings.
Nowdays, thermosetting powder coatings are widely used to coat many different articles. Most of these powder coatings could provide coating films with high gloss after melted and cured, typically equal to or greater than 90% gloss.
In recent years, as users' perceptions of film gloss have changed, the demand for powder coatings that can provide good quality coatings and have low gloss is growing, for example, for coating certain accessories in the automotive industry, such as wheels, bumpers, etc., or to coat metal sheets and beams used in construction.
◎Basic Features
Excellent mechanical properties
Outstanding dry blend matting properties
Good weatherability
Good leveling
◎Specifications I
| Items | NH8002 | NH8507 | Test Method |
| Appearance | Light-colored flake | Light-colored flake | T/GDTL 004-2019 |
| Acid Number (mgKOH/g) | 49～55 | 20～25 | GB/T 6743-2008 |
| Softening Point (℃) | 103～113 | 103～113 | GB/T 12007.6 |
| Glass Transition Temp. (℃) | ～61 | ～62 | GB/T 19466.2 |
| Melting Viscosity (ICI, mPa·s/200℃) | 3500-6500 | 6500-9500 | GB/T 9751.1-2008 |
| Reactivity at 180℃ (s, 10, 5% TGIC) | 50-150 | 150-350 | T/GDTL 004-2019 |
| Curing Requirement | 200℃×10min | ||
| Packaging | PE Bags, Net Weight 25kg ± 0.1kg / bag | ||
◎Specifications II
| Extrusion Condition | Two-screw Extruder | |
| Jacket Temperature | 110～120℃ | |
| Speed of Revolution | 500～1200rpm | |
| Fineness of Powder | ＜100μm | |
| Application Condition | NH8002 and NH8507 were extruded separately according to the formula, and the two flakes were mixed and pulverized in a ratio of 1:1. | |
| Electrostatic Spraying With | 40～70KV | |
| Coating Film Thickness | 50～70μm | |
| Degreased Cold-rolled Steel | 0.5mm | |
| Film Properties | Gloss (60°) | 25-50 |
| Bending (φ2mm) | Pass | |
| Adhesive (1mm, grade) | 0 | |
| Pencil Hardness | ≥H | |
| Impact (50cm) | Pass | |
◎More Code
| Code | Ratio | Cure Cycle | Acid Value (mgKOH/g) | Viscosity (mPa.s/200℃) | Tg (℃) | Reactivity (s/180℃) | Properties |
| NH8001 | 90/10 | 200℃*10min | 48~54 | 2700~4300 | ~62 | 50-110 | Dry-blended for 25-40% gloss powder coating; Excellent anti-yellowing, good flow. |
| NH-8505 | 95/5 | 200℃*10min | 19~24 | 5000~7500 | ~62 | 280-520 | |
| NH8003 | 90/10 | 200℃*10min | 48~54 | 4000~6000 | ~68 | 60-120 | Dry-blended for low gloss powder coatings, suitable for heat transfer print powder coatings with good outdoor durability and excellent mechanical properties. |
| NH8606 | 96/4 | 200℃*10min | 20~25 | 8000~10000 | ~60 | 280-400 | |
| NH8002 | 90/10 | 200℃*10min | 49~55 | 3500~6500 | ~61 | 50-150 | Dry-blended for low gloss powder coatings with good flexibility and high impact resistance. |
| NH8507 | 95/5 | 200℃*10min | 21~25 | 7500~10500 | ~62 | 200-400 |
◎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
