Puren commissions new production line for recycled PU board

The certification allows the company to use Covestro’s Desmodur CQ MS binder, which is produced using bio-circular feedstocks attributed through a mass-balance system.

Puren plans to launch its first Purenit product made with the binder in 2027. The companies did not disclose the new line’s production capacity, investment cost or the expected reduction in the product’s carbon footprint.

Purenit is a compressed functional material manufactured from rigid polyurethane and polyisocyanurate foam residues. The waste material is combined with a binder and pressed into homogeneous boards with a density of approximately 550 kg/m³.

The material is used in windows, doors, façades and other construction applications, as well as in bathrooms, outdoor kitchens, motorhomes, commercial vehicles and ships. It can be processed using conventional woodworking equipment.

ISCC Plus certification verifies the allocation of alternative raw materials through the supply chain. Under the mass-balance system, bio-circular feedstocks are introduced during an earlier production stage and mathematically attributed to the finished binder rather than being physically segregated throughout production.

Covestro describes Desmodur CQ MS as an MDI binder based on attributed feedstocks derived from biological waste and residues. Its climate-neutrality claim covers the product’s life cycle from raw-material extraction to the Covestro factory gate and includes biogenic carbon uptake. It does not rely on carbon-offsetting measures.

Puren managing director Andreas Huther said the certification would enable the company to reduce the carbon footprint of purenit without changing its material performance.

The new product will combine the recovery of rigid-PU production residues with the use of a mass-balanced MDI binder.

Photo: Example of polyurethane residual materials used to produce Purenit at the newly ISCC PLUS certified site in Obermarchtal. Credit: Covestro

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