Chemical Powders

HAA Hardener KC552
HAA Hardener KC552 is a tetra-functional group containing-β-hydroxyalkylamide. As a substitute of TGIC, it is suitable for curing with carboxyl-terminated polyester or acrylic resin to provide TGIC-free based exterior durable powder coatings.

1.Specification
Appearance： White powder
Melting point： 122-128°C
Hydroxyl value： 685-720mgKOH/g
Volatile： Max. 1%
Solubility Soluble in water

2.Characteristics
-Non-toxic in comparison with TGIC, the resulting TGIC-free based exterior durable powder coatings were non-toxic, non-irritant to skin and safety to human body.
-Proved weather-resistance and low temperature curing (150°C) property.
-Exhibited enhanced charging properties so better powder transfer efficiency could be obtained.
-Excellent flow and mechanical properties

3.Suggested Formulation
Recommended to design formulation by weight parts of 95/5(resin with KC1552) for pure polyester

Formulation parts by weight, g
Polyester (30-35mgKOH/g) 560
KC1552 30
Resiflow PV88 8
TiO2 or BaSO4 392
Degassing agent 10
Total 1000

*Baking condition: 180°C /15 Min. or 200°C /7-10 Min.
Extruded condition：100 -110°C
4.Packing
25kgs net per paper bag
5.Storage and handling
Store it in the cool and dry place and close packages after use to avoid moisture
6.Shelf life
At least 1 year when properly stored