A major group of insulation foam is based on rigid polyurethane (PU) because of its excellent insulation properties. PU foam can be applied in several ways such as insulation boards with flexible or rigid facing, spray coating or via can foam. In order to meet the required fire standards, flame retardants are usually added to the rigid PU foams.

LANXESS offers a comprehensive range of flame retardants, which are particularly suitable for this type of foam. This includes products based on phosphorus such as Levagard® PP and Levagard® TEP-Z as well as brominated flame retardants such as PHT4-Diol, a reactive compound.