60/40 Hybrid Polyester Resin for Fast Curing Powder Coatings
◎Introduction
HH2681 is a saturated polyester resin mainly applied to polyester/epoxy powder coatings. It features fast curing, excellent mechanical properties, and good storage stability.
For fast-curing powder coatings, the traditional concept is that adding the curing accelerator in the formulation design of powder coatings can easily achieve the goal of rapid curing; However, excessive reliance on additives often brings about other negative criticisms, such as poor leveling, yellowing and fading during baking, poor thermal storage performance of powder, etc.
In fact, the main raw material of powder coating is polyester resin. We can achieve this goal by using fast-curing polyester resin. Using fast curing polyester in powder coatings is often helpful in the following aspects. For example: (1) improve the crosslinking density, thereby improving the mechanical properties such as film hardness, cross-cutting adhesion, impact resistance, etc; (2) Reduce the curing temperature or shorten the curing time to achieve low temperature curing or rapid curing; (3) It blocks the melting and leveling of the powder, and realizes the control of the size of the texture and the stereoscopic sense; (4) It interferes with the slow or medium curing system to reduce the clear gloss while leveling.
◎Basic Features
Fast curing
Excellent mechanical properties
Good storage stability
◎Recommend Formulation:
| HH2681 | 014U | Filler | Leveling agent | Benzoin | 701 |
| 180 | 120 | 192 | 2 | 2 | 2.5 |
◎Specifications I
| Appearance | White or Light Yellow Transparent Flakes |
| Color (50%DMF) | max:3 |
| Acid Number (mgKOH/g) | 53～60 |
| Softening Point (℃) | 95～105 |
| Glass Transition Temp. ( ℃) | ~ 54 |
| Melting Viscosity (ICI, mPa·s/200℃) | 2500~4500 |
| Reactivity at 180℃ (s, 40% Epoxy) | 90~150 |
| Curing Requirement | 180℃×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 | 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) | 23~33 |
| Gloss (60°) | ≥90% |
| 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/200ºC) | Tg (ºC) | Reactivity (s/180ºC) | Properties |
| HH2681 | 60/40 | 180ºC*10min | 53~60 | 2500~4500 | ~54 | 90-150 | For Fast cure formulation. Excellent mechanical properties and good storage stability. |
| HH2682 | 60/40 | 180ºC*10min | 47~55 | 2500~3500 | ~56 | 150-250 | For Fast cure formulation. High Tg, excellent flow and good mechanical properties. |
| HH2683 | 60/40 | 180ºC*15min | 47~55 | 2500~3500 | ~54 | 90-150 | General purpose resin with good flow, good chemical resistance and mechanical properties. |
| HH2683B | 60/40 | 180ºC*15min | 47~55 | 2500~3500 | ~54 | 120-180 | Non-tin version of HH2683. |
| HH2685 | 60/40 | 180ºC*20min | 47~55 | 2500~3500 | ~58 | 200-300 | Excellent flow, high gloss. Suitable for alloy wheel-hub powder coatings. |
| HH2686 | 60/40 | 200ºC*10min | 52.5~57 | 3000~4500 | ~55 | 170-300 | Economic general purpose resin. Excellent flow, good matting performance. |
| HH2686P | 60/40 | 200ºC*10min | 50~60 | 2500~4500 | ~55 | 240-360 | General purpose resin. Excellent flow and strong anti-interference ability. Good balance of properties. Suitable for matt powder coatings. |
| HH2687 | 60/40 | 200ºC*10min | 51~66 | 3000~5000 | ~60 | 200-300 | High Tg, excellent flow, 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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