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 (%)
|
12-06
|
[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.
