Kinte Materials Science and Technology Co.,Ltd
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96/4 HAA Blended Polyester Resin for Low Gloss Powder Coatings
◎Introduction
NH6688 are saturated carboxyl polyester resins for low gloss polyester/primid (96:4) powder coatings by dry blending procedure.
Conventional matte powder coatings are matted by adding a matting curing agent to the powder to achieve a matting effect during the curing process, which reduces the quality of the powder because there is a low-temperature kneading process during the powder production process, resulting in the formation of impurities before the powder is cured.
Dry mixed matting powder coatings are made of fast and slow (high, low acid value) two components of the powder, through the two powders in accordance with the 1:1 mixture of homogeneous, stable coating gloss, boiling resistance, and greatly improve the weatherability and mechanical properties of the coating, as well as storage stability.
At the same time, the dry mixing matting method avoids the addition of matting agent in the production process, which further reduces the cost of powder coatings.
◎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:
| Appearance | Pale yellow flakes |
| Color (50% DMF) | ≤3 |
| Acid Value (mgKOH/g) | 19～24 |
| Softening Point (℃) | 100～110 |
| Glass Transition Temp. (℃) | ～58 |
| Melting Viscosity (200℃, cone/plate, mPa·s) | 5600±800 |
| Reactivity at 180℃ (s, 4% XL552) | 250±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 | |
| Blending Extrudate I and II with weight ratio 1:1 before grinding. | ||
| 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!
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.