60/40 Polyester Epoxy Resin for Fast Curing Hybrid Powder Coatings
HH2686 is a carboxyl polyester resin designed for 60/40 hybrid powder coatings.
The so-called leveling property of the coating refers to the smooth and smooth state of the coating film after the coating is applied. The surface with good leveling property should have no irregularities such as orange peel, brush marks, ripples, and shrinkage holes.
The factors affecting the leveling of powder coatings mainly include three aspects:
1. Leveling additives: Add appropriate leveling additives to the formula of powder coatings. When the powder coating is melted, these additives can quickly reduce the surface tension of the coating, promote the rapid flow of the coating before curing and film formation, eliminate or reduce orange Surface defects such as skin, brush marks, ripples, shrinkage holes, etc.
2. The melt viscosity of powder coatings: For thermosetting powder coatings, in the process of melt flow, along with the cross-linking curing reaction, the higher the temperature, the faster the curing reaction, the faster the viscosity of the system rises, the shorter the flow time, the faster the leveling Sex is restricted. Therefore, the melt viscosity of powder coatings cannot accurately reflect the final leveling property of the coating film, and the effects of baking process, heating rate, cross-linking curing temperature, etc. on the leveling property of the coating film must be considered at the same time.
3. Baking process: There is a heating process during baking after powder coating is applied, and the heating rate has a considerable impact on the leveling of the coating; under different heating rates, the dynamic viscosity changes with temperature. The trend is basically the same, that is, the beginning The viscosity decreases with the increase of temperature and reaches a minimum value, and then the viscosity increases with the increase of temperature, which is caused by the cross-linking reaction. More importantly, the faster the heating rate, the smaller the minimum value of the viscosity, and the higher the corresponding temperature, the better the curing of the coating film and the better the leveling of the coating film.
Basic Features
Excellent leveling
Outstanding mechanical properties
Good chemical resistance
Good storage stability
Recommend Formulation:
| Material |
HH2686 |
E12 |
Filler & Pigment |
Leveling |
Benzoin |
701 |
| Formula |
360 |
240 |
383 |
8 |
4 |
5 |
Specifications:
| Appearance |
White or Light Yellow Transparent Flakes |
| Color (50% DMF) |
max:3 |
| Acid Number (mgKOH/g) |
52.5~57 |
| Softening Point (ºC) |
93~103 |
| Glass Transition Temp. ( ºC) |
~55 |
| Melting Viscosity (ICI, mPa·s/200ºC) |
3000~4500 |
| Reactivity at 180ºC (s, 40% Epoxy) |
170~300 |
| Curing Requirement |
180ºC×15min or 200ºC×10min |
| Package |
PE Bags, Net Weight 25kg±0.1kg / bag |
Extrusion Condition:
Two-screw Extruder
Zone I: 90~110ºC Zone II: 110~120ºC
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 (180ºC, sec) |
220~320 |
| Horizontal Flow (180ºC, mm) |
28~30 |
| Gloss (60°) |
≥90% |
| Bending (φ1mm) |
Pass |
| Adhesive (1mm, grade) |
0 |
| Pencil Hardness |
≥1H |
| Impact (50kg·cm) |
Pass |
More Code
| Code |
Ratio |
Cure Cycle |
AV (mgKOH/g) |
Viscosity (mPa.s/200ºC) |
Tg (ºC) |
Reactivity (s/180ºC) |
Properties |
| 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 Certificates. Due to the excellent and stable quality, our products always enjoy a high reputation at home and overseas, and were sold to more than 30 countries.
The polyester resin branch was founded in 2000, now there are two factories (DongGuan factory and TaiXing Factory) with an annual production capacity of 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 to 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 a brilliant future with you together.
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