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.
- High crosslink density
- High glass transition temperature
- Excellent antigraffiti properties
- Excellent durability
- Good levelling
- Automotive coatings
- Coatings for decorative metal surfaces
- Antigraffiti coatings
- Household appliances
- Metal rim coatings
Crosslinkers for the formulation of PUR powder coatings.
The product comprises a blocked caprolactam cycloaliphatic polyisocyanate adduct with a deblocking temperature of 160 °C. Provides good chemical resistance and weatherability.
The product comprises a blocked caprolactam cycloaliphatic polyisocyanate adduct with a deblocking temperature of 160 °C. Provides enhanced chemical resistance and excellent weatherability.
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Please note that products may not be available in every country. Consult with your area sales manager for further information.