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 (%)	12-08	[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.