Blocked crosslinking agents for PU powders

VESTAGON® B crosslinkers are ε-caprolactam blocked IPDI based polyisocyanates providing highest possible crosslink density besides good levelling.

Our VESTAGON® B grades are blocked by using an external blocking agent. During synthesis, the reactive group is rendered inert through the formation of a relatively weak urea bond. This bond can be cleaved upon heating starting at 170°C by forming ε-caprolactam.
From linear to highly branched, Evonik provides a full range of externally blocked crosslinkers to allow formulators to meet various demands of end customers.

Benefits

  • High crosslink density
  • High glass transition temperature
  • Excellent antigraffiti properties
  • Excellent durability
  • Good levelling

Applications

  • Automotive Coatings
  • Coatings for Decorative Metal Surfaces
  • Antigraffiti Coatings
  • Household Appliances
  • Metal Rim Coatings

Crosslinkers for the formulation PUR powder coatings.

Comprising a blocked caprolactam cycloaliphatic polyisocyanate adduct with a deblocking temperature of 160°C. Provides good chemical resistance and weatherability.

Comprising a blocked caprolactam cycloaliphatic polyisocyanate adduct with a deblocking temperature of 160°C. Provides enhanced chemical resistance and excellent weatherability.

Webinar Recording: Glänzende Aussichten mit PUR Pulverlack Systemen (Farbe & Lack, 2019)

Please note that products may not be available in every country. Consult with your area sales manager for further information.