jietonda ^®   k7 152

 p olyisocyanate curing agent for powder coatings

jietonda ^®  k7 1 5 2  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 granule	[visual]
nco content (%)	12-14	[di-n-butylamine method]
free nco(%)	≤1.0	[di-n-butylamine method]
tg（℃）	55-65	dsc

        herein described to be typical properties and do not constitute specification limits.

 

2. characteristics

l extremely high crosslink density , excellent surface hardness and chemical resistance for coating .

l excellent leveling and smoothness.

l excellent weather resistance and anti yellowing performance.

 

3. use method & levels

equivalent weight of this product is approx 310. it is recommended to cure with hydroxyl polymer in equivalent amount (15:85 for polyester with hydroxyl value of 30; 22:78 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 temperature under 32℃ and cool dry place to avoid caking. keep package closed after using. keep away from heat and fire.
• based on our experience the shelf life of this product under above conditions is at least 2 years.