Products

VESTAGON® B

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

Our VESTAGON® B grades bear isocyanate groups reversibly reacted with an external blocking agent. During synthesis the reactive isocyanate group is rendered inert through the formation of a relatively weak urea bond. This bond can be cleaved upon heating starting from 20 min. at 170°C by forming ε-caprolactam.

From linear to highly branched as well as for highest possible chemical resistance Evonik provides a full range of external blocked crosslinkers enabling formulators to meet various demands of end customers.

Product
Supply Form
NCO content
Tg
Remarks
VESTAGON® B 1400 
Pellets / Flakes
12.5-14.0 % bwt 
~52˚C 
For coatings with good chemical resistance 
VESTAGON® B 1530 
Pellets / Flakes 
14.8-15.7 % bwt 
~48˚C 
Like B 1400 but excellent durability