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[China]
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Address: 16th Yufeng Road, HuaDu District , Guangzhou,China
Contact name:Yarly ，Carolyn
Kinte Materials Science and Technology Co.,Ltd |
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Low Cure Blended Polyester Resin for Low Gloss Outdoor HAA Powder Coatings
◎Introduction
NH6161 and NH6687 are high and low acid value polyester resins respectively, which are used in polyester/primid (HAA) powder coating systems. Using NH6161 and NH6687 to make powder respectively and then dry mixing to make outdoor semi-gloss powder coating.
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 concept 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.
At present, the curing temperature of polyester for dry-blended matt powder coating of the HAA system is generally 180℃, and a higher curing temperature means more energy consumption. Studies have shown that for every 10°C drop in the curing temperature of the coating, about 10% of the energy can be saved.
And NH6161 and NH6687 can achieve 160 ℃ low-temperature curing so that the application field of powder coatings has been further expanded.
◎Basic Features
Low temperature curing
Llow coating gloss
Good weather resistance and leveling
Excellent mechanical properties
Good water resistance
◎Recommend Formulation:
| Formulation | NH6161 | NH6687 | XL-552 | Pigments & Fillers | Leveling Aegnt | Benzoin |
| I | 200 | — | 22.2 | 150 | 2.4 | 1.2 |
| II | — | 200 | 8.3 | 150 | 2.4 | 1.2 |
◎Specifications I
| Items | NH6161 | NH6687 |
| Appearance | Pale yellow flake | Pale yellow flake |
| Acid Number (mgKOH/g) | 68～76 | 24～29 |
| Softening Point (℃) | 100～115 | 100～115 |
| Glass Transition Temp. (℃) | ～58 | ～56 |
| Melting Viscosity (ICI, mPa·s) | 3500±1000 | 5200±1200 |
| Reactivity s (180℃, 10,5% T105) | 90±40 | 210±80 |
| Curing Requirement | 160℃×15min | |
| Packaging | PE Bags, Net Weight 25kg ± 0.1kg / bag | |
◎Specifications II
| Extrusion Condition | Two-screw Extruder | 110～120℃ |
| Speed of Revolution | 500～1200rpm | |
| Fineness of Powder | ＜100μm | |
| Extrude NH6161 and NH6687 respectively according to the formula, and mix and pulverize in a ratio of 1:1 to make powder. | ||
| Application Condition | Electrostatic Spraying With | 40～70KV |
| Coating Film Thickness | 50～70μm | |
| Degreased Cold-rolled Steel | 0.5mm | |
| Film Properties | Gloss (60°) | ≤38% |
| 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 |
| NH6083 | 90/10 | 180℃*10min | 80~90 | 1500~3500 | ~58 | 30-90 | Fast cure resin. For one shot matt formulations. |
| NH6685 | 96/4 | 180℃*10min | 19~24 | 4800~6400 | ~57 | 220-280 | |
| NH6381 | 93/7 | 180℃*10min | 47~54 | 3800~4800 | ~60 | 60-120 | Dry-blended for low gloss powder coatings with good mechanical properties and flow. |
| NH6688 | 96/4 | 180℃*15min | 19~24 | 4800~6400 | ~56 | 220-280 | |
| NH6161 | 91/9 | 160℃*15min | 68~76 | 2500~4500 | ~59 | 50-150 | Low bake resins. Dry-blended for low gloss powder coatings, with good mechanical properties and flow. |
| NH6687 | 96/4 | 160℃*15min | 24~29 | 4000~6500 | ~56 | 160-260 |
◎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!
We have gained ISO9001 and ISO14000, ISO18001, RoHS, UL certification and QUALICOAT Certificate. Due to the excellent and stable quality, our products always enjoy high reputation at home and oversea, and were sold to more than 30 countries.
Polyester resin branch was founded in 2000, now there are two factories (DongGuan factory and TaiXing Factory) with annual production capacity over 80,000 tons, and the annual production capacity reached 120000 tons by the end of 2020, opening the road to global diversified development. Our clients include many top-tier powder manufacturers in the world such as AKZO, PPG, TIGER, PROTECH, NIPPON, OXYPLAST, JOTUN, SHERWIN, VALSPAR, SINTERPLAST, etc.
We unremittingly stick at the business principle of “Quality is the life, adhere to first-class technology, first-class quality, first-class cost and first-class brand”. We would like to provide a complete set of services and solutions for both domestic and abroad customers and would like to go forward to brilliant future with you together.
