93/7 Low Cure Saturated HAA Polyester Resin for Primid Powder Coatings System
◎Introduction
NH6343 is a saturated polyester resin, mainly used in low curing polyester/HAA (primid) powder coating systems.
Although powder coatings have the four "E" advantages of economy, environmental protection, high efficiency, and superior performance, they also have obvious weaknesses. The general curing temperature of powder coatings is between 180-200°C. High curing temperature leads to increased energy consumption and hinders the coating of some substrates such as plastics and wood that cannot withstand high temperatures, which significantly affects the expansion of powder coatings application fields.
If the curing temperature can be reduced, the energy consumption can be reduced, which is the need for environmental protection, energy saving, and emission reduction; at the same time, it also breaks the limitations of metal substrates and expands the application field of powder coatings. Therefore, the realization of low-temperature curing of powder coatings has become one of the development directions of the powder coatings industry.
◎Basic Features
Suitable for low temperature curing
Good mechanical properties and weather resistance
◎Recommend Formulation:
| NH6343 | T-105 | Filler ＆ pigment | Leveling agent | Benzoin | 701 | 703 |
| 558 | 42 | 380 | 10 | 3 | 3 | 4 |
◎Specifications I
| Appearance | White or Light Yellow Transparent Flakes |
| Acid Number (mgKOH/g) | 49～55 |
| Softening Point (℃) | 101～111 |
| Glass Transition Temp. ( ℃) | ～55 |
| Melting Viscosity (ICI, mPa·s/200℃) | 4500±1000 |
| Reactivity at 180℃ (s, 7% T-105) | 130±30 |
| Curing Requirement | 140℃×20-25min |
| Packaging | PE Bags, Net Weight 25kg ± 0.1kg / bag |
◇Extrusion Condition:
Two-screw Extruder
Jacket Temperature: 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) | 90~150 |
| Horizontal Flow (180℃, mm) | 22~25 |
| Gloss (60°) | ≥85% |
| Bending (φ1mm) | Pass |
| Adhesive (1mm, grade) | 0 |
| Pencil Hardness | ≥1H |
| Impact (50cm) | Pass |
◎More Code
| Code | Ratio | Cure Cycle | AV (mgKOH/g) | Viscosity (mPa.s/200℃) | Tg (℃) | Reactivity (s/180℃) | Properties |
| NH6353 | 93/7 | 150℃*15min | 49~55 | 3500～5500 | ~55 | 100-160 | For low bake powder coatings with good outdoor durability, good flow and excellent mechanical properties. |
| NH6361 | 93/7 | 160℃*10min | 48~53 | 2300~3700 | ~55 | 50-110 | For low bake powder coatings with high crosslinking density and good 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).
◎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.
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