Search
Schiff Panorama

VESTAGON® BF

Product

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.
   
 

Product
Supply Form  
NCO Content
TG
Remarks

VESTAGON® BF 1320

Coarsely ground

13.5-15.0 % bwt

~75 ˚C   

Higher functionality than VESTAGON® BF 1540

VESTAGON® BF 1321

Coarsely ground

14.0-15.5 % bwt

~77 ˚C

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

Coarsely ground

12.5-14.0 % bwt

~61 ˚C

For polyurethane coatings with Class A surfaces

VESTAGON® BF 1540

Granules

15.2-17.0 % bwt

~84 ˚C

Uretdione with high isocyanate content; good choice for standard, non-emissive polyurethanes

Granules

11.5-13.0 % bwt

~50 ˚C

Low viscosity crosslinker for novel low temperature cure PUR coatings, min. 120 °C at 30 minutes, good surface levelling

VESTAGON® EP-BF 9030

Powder

Catalyst for low temperature cure uretdione-based systems and hybrids as well