VESTAGON® BF grades are internally blocked IPDI based polyisocyanates enabling the formulation of coatings with considerably low emission values.
Our VESTAGON® BF grades bear isocyanate groups reversibly reacted with each other.
During synthesis the reactive isocyanate groups are rendered inert through the formation of a relatively weak uretdione ring. This bond can be cleaved upon heating starting from 30 min. at 120°C.
Although the total isocyanate content of these products is similar to e-caprolactam blocked grades, their functionality is somewhat lower. The use of polyesters with a higher hydroxyl content can compensate for this.
VESTAGON® BF 1320
13.5-15.0 % bwt
Higher functionality than VESTAGON® BF 1540
VESTAGON® BF 1321
14.0-15.5 % bwt
Lower melt viscosity compared to BF 1320. Particularly suitable for heat transfer printing application using one shot matte PUR powder coatings
VESTAGON® EP-BF 1350
12.5-14.0 % bwt
For polyurethane coatings with Class A surfaces
VESTAGON® BF 1540
15.2-17.0 % bwt
Uretdione with high isocyanate content; good choice for standard, non-emissive polyurethanes