93/7 HAA Dry Blended Polyetser Resin For Powder Coating With Low Gloss
93/7 HAA Dry Blended Polyetser Resin for Powder Coating with Low Gloss
◎Introduction
NH6381 are saturated carboxyl polyester resins for low gloss polyester/primid (93:7) powder coatings by dry blending procedure.
At present, powder coatings for outdoor use are usually cured with TGIC. However, due to the physiological toxicity of TGIC, it has been banned by the European Union and other places. Therefore, the use of environmentally friendly and non-toxic HAA to replace TGIC has become the trend in the powder coating industry.
With the change in people's aesthetic concepts and the problem of light pollution caused by high-gloss coatings, matte powder coatings that can produce soft surface effects are more and more widely used.
Dry-blending matting method is a commonly used method for preparing matte powder coatings. This method uses different polyesters with large differences in reactivity during the curing process. Due to the difference in reactivity, the coating surface produces a microscopically rough surface to achieve a matting effect. The gloss of 18-45 can be obtained without adding a matting aid, and the overall cost is low.
◎Basic Features
Low gloss film
Excellent mechanical properties
Good leveling, good storage stability
Good chemical resistance, fine anti-yellowing
◎Recommend Formulation:
| Formulation | NH6381 | NH6688 | T-105 | Filler ＆ pigment | Leveling agent | Benzion |
| I | 200 | — | 15 | 150 | 2.4 | 1.2 |
| II | — | 200 | 7.5 | 150 | 2.4 | 1.2 |
◎Specifications I:
| Appearance | pale yellow flake |
| Color (50% DMF) | ≤3 |
| Acid Number (mgKOH/g) | 47～54 |
| Softening Point (℃) | 98～118 |
| Glass Transition Temp. (℃) | ～56 |
| Melting Viscosity (200℃, cone/plate, mPa·s) |
2800±1000 |
| Reactivity at 180℃ (s, XL552) |
90±30 |
| Curing Requirement | 180℃×15min |
| 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 | 50～80μm | ||
| Degreased Cold-rolled Steel | 0.5mm | ||
| Film Properties | |||
| Gloss (60°) | ≤40% | ||
|
Bending (φ2mm) |
Pass | ||
| Adhesive (1mm, grade) | 0 | ||
| Pencil Hardness |
≥1H |
||
| Direct Impact Resistance |
pass 50kg·cm |
||
◎Remarks:
All the polyester resins could be customized to Non-tin (A), anti gas burners (G), tribo gun (T) and anti-blooming (F).
◎Company Profile
Kinte Materials Science and Technology Co., Ltd. is subordinate to China Machinery Industry Corporation (a key state-owned enterprise directly managed by SASAC, ranking 284 among the world's top 500 in 2021). It is a national high-tech enterprise under China National Electric Apparatus Research Institute Co., Ltd. (Stock Code: 688128), a listed enterprise on the SSE STAR MARKET. Focusing on the R & D, production, and sales of environmentally friendly coatings (powder coatings, waterborne industrial coatings) and powder coating resins, the company is committed to improving the global market competitiveness of China's environmentally friendly coating industry. Now it has become the leader and promoter in China’s technological development of environmentally friendly coatings as well as polyester resins for powder coatings!
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.