BASF launches low-VOC antioxidants for polyols, polyurethane foams

Ludwigshafen, Germany – BASF has launched a new anti-scorch solution for polyurethane foams and polyols, which it says offers “exceptional performance” while adhering to regulations.

Irgastab PUR 71 antioxidant has been formulated without aromatic amine, effectively addressing the limitations of conventional anti-scorch additives, said BASF in a statement 12 Dec.

In the manufacturing of polyurethane foams, the heat generated during the process can cause discoloration, loss of mechanical properties, and even fire hazards if the polyols are not “properly stabilised”.

Conventional anti-scorch products rely on phenolic antioxidants and aromatic amine stabilisers, which BASF said come with “significant drawbacks” such as unpleasant odour, toxicity concerns, or high volatility.

Without aromatic amine, the new BASF product is claimed to decrease emissions and lower the potential harm to humans and aquatic organisms compared to conventional solutions.

The package helps achieve “significantly reduced levels” of volatile organic compounds (VOC) and condensable emissions (FOG) released from PU foams.

Anti-scorch additives are used in polyurethanes to minimise degradation caused by exothermic reactions during the processing of PU foams.

According to BASF, the new antioxidant can be used in PU applications in the automotive industry, as it improves air quality within the interior of vehicles.

In the comfort sector, it can provide anti-scorch resistance to prevent heat degradation during the foaming process.

The product, according to BASF, has no “carcinogenic, mutagenic and reprotoxic” (CMR) classification, enabling compliance with environmental voluntary certifications.