Product
VESTAGON® BF
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.
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Product
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Supply Form
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NCO Content
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TG
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Remarks
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VESTAGON® BF 1320
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Coarsely ground
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13.5-15.0 % bwt
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~75 ˚C
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Higher functionality than
VESTAGON® BF 1540
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VESTAGON® BF 1321
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Coarsely ground
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14.0-15.5 % bwt
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~77 ˚C
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Lower melt viscosity compared to BF 1320. Particularly suitable for heat transfer printing application using one shot matte PUR powder coatings
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VESTAGON® EP-BF 1350
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Coarsely ground
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12.5-14.0 % bwt
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~61 ˚C
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For polyurethane coatings with
Class A surfaces
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VESTAGON® BF 1540
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Granules
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15.2-17.0 % bwt
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~84 ˚C
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Uretdione with high isocyanate
content; good choice for standard, non-emissive polyurethanes
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