Jietonda® K7150
Blocked polyisocyanate curing agent for PU powder coatings
Jietonda® K7150 is a closed polyisocyanate curing agent for powder coatings, designed to cure with hydroxy polyester or hydroxy acrylic resin to provide a smooth, weather-resistant and highly cross-linked powder coating.
1. Typical properties
Appearance White to pale yellow granula [visual]
NCO content (%) 14-16 [Di-n-butylamine method]
Free NCO (%) ≤1.0 [Di-n-butylamine method]
Tg (℃) 45-55 [DSC method]
Herein described to be typical properties and do not constitute specification limits.
2. Characteristics
? Extremely high crosslink density , excellent surface hardness and chemical resistance for coating .
? Excellent leveling and smoothness.
? Excellent weather resistance.
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3. Use method & levels
? Equivalent weight of this product is approx 275. It is recommended to cure with hydroxyl polymer in equivalent amount (13:87 for polyester with hydroxyl value of 30; 20:80 for polyester with hydroxyl value of 50). Tin-based catalysts can significantly improve coating mechanical properties and solvent resistance..
? Unsealing temperature of this product is above 170℃, so it is recommended to fully cure at 180℃*20min or 200℃*15min.
4. Package & Storage
? Packaging with PE lined Kraft paper bags. Net weight 25kg per bag.
? Store in a cool and dry place to avoid moisture absorption. It should be closed immediately after use and away from fire..
? Based on our experience, this product is valid for at least two years at a storage temperature of <32°C.
