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.