TMA Free 70:30 Hybrid Powder Coating Resins for Fast Curing Indoor Use
◇ Introduction:
HH2781 is a completely TMA free hybrid polyester resin.
Trimellitic anhydride (TMA) is an important chemical intermediate and an important raw material for polyester resin, polyimide resin, polyvinyl chloride heat-resistant plasticizer, epoxy resin curing agent, dye capacitor impregnating oil and adhesives and other products. . TMA molecule contains benzene ring, carboxylic acid and acid anhydride structure at the same time, which can improve the glass transition temperature (Tg), crosslinking density, viscosity and acid value of polyester resin, and improve the chemical resistance, storage stability and chemical resistance of powder coatings. Flowability, so it is used as an end capping agent for indoor polyester resins.
However, the benzene cyclic anhydride structure in TMA is irritating, and the direct contact of free TMA with the human body can easily cause eye damage, mucosal irritation, respiratory allergy and gastrointestinal irritation.
Therefore, TMA-free polyester resin is the future development trend.
◇ Basic Features:
Good mechanical properties
Good leveling
Good reactivity
◇Specifications:
| Appearance | White or Light Yellow Transparent Flakes |
| Color (50% DMF) | max:3 |
| Acid Number (mgKOH/g) | 30～36 |
| Softening Point (℃) | 95～105 |
| Glass Transition Temp. ( ℃) | ～56 |
| Melting Viscosity (ICI, mPa·s/200℃) | 4500～6500 |
| Reactivity at 180℃ (s, 30% Epoxy) | 120～240 |
| Curing Requirement | 180℃×10min |
| Package | PE Bags, Net Weight 25kg±0.1kg / bag |
◇Recommend Formulation:
| Material | HH2781 | E14U | Filler ＆ Pigment | Leveling | Benzoin | 701 |
| Formula | 210 | 90 | 192 | 4 | 2 | 2.5 |
◇Extrusion Condition:
Two-screw Extruder
Zone I: 90～110℃ Zone II: 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) | 120~220 |
| Horizontal Flow (180℃, mm) | 23~26 |
| Gloss (60°) | ≥90% |
| Bending (φ1mm) | Pass |
| Adhesive (1mm, grade) | 0 |
| Pencil Hardness | ≥1H |
| Impact (50kg·cm) | Pass |
◇More Codes:
| Code | Ratio | Cure Cycle | AV (mgKOH/g) | Viscosity (mPa.s/200℃) | Tg (℃) | Reactivity (s/180℃) | Properties |
| HH2781 | 70/30 | 180℃*10min | 30~36 | 4500~6500 | ~56 | 120-240 | Economic resin. Fast Cure, good flow and impact resistance. TMA free. |
| HH2781T | 70/30 | 180℃*10min | 30~36 | 4000~5500 | ~55 | 100-200 | HH2781T is tribo chargerable of HH2781. |
| HH2782G | 70/30 | 180℃*15min | 29~35 | 5800~7000 | ~60 | 180-280 | Good storage stability, good balance of properties. TMA free. |
| HH2783 | 70/30 | 180℃*15min | 29~35 | 4500~6500 | ~57 | 180-300 | General purpose resin. Excellent mechanical properties, good flow, good balance of properties. |
Remarks:all the polyester resins could be customizes 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.
