Clear High-Gloss 2K Polyurethane Topcoat for Automotive Utilizing 5.5

This is a formulation for an automotive clear coat, specifically an aqueous two-pack polyurethane (PU) clear coat. It's based on two main components: Bayhydrol U XP 2766 and Bayhydur XP 2655. Here's a breakdown of its components and key characteristics:

Components:

Component 1:

1. Bayhydrol U XP 2766: Water-based polyol resin.
2. Borchi® Gol LA 2, Borchi® Gol LA 50 , Borchi Gol LA 200: Additives.
3. Water : Used for dilution.

Component 2: 6. Bayhydur XP 2655 : Polyisocyanate hardener.

7. Tinuvin 384-2  and Tinuvin 292 : UV stabilizers.
8. Butoxyl (methoxy butyl acetate) : Solvent for viscosity adjustment.

Production Indications:

• Component 1 is mixed first, followed by the gradual addition of additives and water.
• Component 2 (the hardener) is then stirred in.
• Components 1 and 2 are mixed together for 2 minutes.
• Water may be added to adjust the application viscosity.

Technical Data:

• NCO: OH - Ratio: 1.5:1
• Solid Content on Application: Approximately 45%
• Spray Viscosity: 25 seconds (DIN 53211-cup 4 mm, at 23 °C)
• VOC Content: 164 g/l (calculated according to Directive 1999/13/EC)
• Gloss: 92/95 (20°/60°, DIN EN ISO 2813) on ABS (Bayfoil)
• Drying Time: 0.5/3/4 hours (TG 1/TG 2/TG 3, DIN 53150, at room temperature)
• Film Hardness: 219 seconds (pendulum hardness tester-König, after 30 minutes at 80 °C)

Suppliers:

• Covestro: Supplier of Bayhydrol U XP 2766 and Bayhydur XP 2655.
• Milliken: Supplier of Borchi® Gol LA additives.
• Ciba Specialty Chemicals: Supplier of Tinuvin UV stabilizers.
• Celanese: Supplier of Butoxyl solvent.

Disclaimer:

The document includes a disclaimer emphasizing that the provided information is given without warranty and that customers must conduct their own testing and assume responsibility for their specific use of the product.