Glossy two-pack PU clear coat, fast drying, based on Setalux D A 870 BA

This is a formulation for an industrial coating, specifically a glossy two-pack polyurethane (PU) clear coat designed for fast drying. It is based on Setalux D A 870 BA and Desmodur N 3790. Here's a breakdown:

Components:

• Component 1:
  • Setalux D A 870 BA
  • Borchi® Gol OL 44
  • Tinuvin 292
  • Tinuvin 384-2 (50% in butyl acetate)
  • DBTL (1% in xylene)
  • Xylene/butyl acetate/methoxy propyl acetate (1:1:1)
• Component 2:
  • Desmodur N 3790 (90% in butyl acetate)
  • Additive TI
  • Xylene/butyl acetate/methoxy propyl acetate (1:1:1)

Production:

• Component 1 is homogenized in a dissolver.
• Component 2 is prepared separately.
• Mixing ratio of components 1 to 2 is 2:1 by weight.

Application:

• Spraying using a pneumatic flow cup spray gun.

Data:

• Spray viscosity (DIN 53211-cup 4mm nozzle): 20 seconds.
• Solids content on application: 52.5%.
• Pot life: approximately 2 hours.
• Drying time (at 23°C): sand-free in 30 minutes.
• Gloss (20°/60° angle): 90 / 93 (Gardner, DIN 6730 / ISO 2813).

Suppliers:

• Allnex, Milliken, BASF, Rhein-Chemie, Nuplex.