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Materials

Covestro makes biocircular MDI

by Alex Scott
August 23, 2024 | A version of this story appeared in Volume 102, Issue 26
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Polyisocyanurate roofing panels being installed on a roof.
Credit: Covestro
Covestro will make methylene diphenyl diisocyanate, used in roofing panels, from renewable raw materials.

Covestro will supply the building material company Carlisle Construction Materials with methylene diphenyl diisocyanate (MDI), a polyurethane intermediate, made from biobased or recycled materials. Carlisle will use the low-carbon MDI to make polyisocyanurate insulation boards. Certification body ISCC has verified that the biocircular MDI has a 99% lower carbon footprint compared with MDI made from fossil fuels. Covestro uses a mass balance approach, in which the share of sustainable product from a manufacturing plant is dependent on the share of sustainable feedstock.

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