Matting hardener for TGIC based powder coatings

K2068 is a matting hardener with TGIC as co-reactant, which can provide low-gloss of ca.10%, good impact and exceptional flow properties for exterior durable PES/TGIC powder coatings. It may also be used in both epoxy and epoxy/polyester hybrid powder coating with low-gloss finish.

1.Typical properties

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

2.Characteristics

1. Can provides low gloss of ca.10% (60°), exceptional flow and good mechanical properties such as direct impact for PES/TGIC based exterior durable powder coatings.
2. Curing at 200℃(metal temperature) are required for both better flow and impact properties.

3.Use method & levels

1. Premix K2068 together other components in a high-speed mixer before extrusion.
2. The use level is 1-5% by total weight of formulation, depends on the gloss required.
3. Ca. 1.1-1.16 parts of TGIC per weight part of K2068 based on their chemical equivalent weights. Varying their total concentrations of in the formulation can control different gloss levels of coating when both ratios were retained at above fixedness.

4.Package & Storage

1. Packaging with PE lined Kraft paper bag. Net weight 25kg per bag.
2. Store in temperature between 2 and 32℃ or cool dry place. Keep away from heat and fire.
3. Based on our experience the shelf life of this product under above conditions is at least 3 years.

5.Advisement

1. When formulating K2068, the gloss of coating will be determined by its concentration and the selected polyester resins. It is important to select matched resins.
2. The powder coating formulated by K2068 have a bit yellowing tendency and poor wet-thermal resistance.