Halogen-free, flame-retardant rigid polyurethane foam and a process for its production
AssigneeClariant GmbH
InventorsAnne Witte, Wilfried Krieger
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Abstract
The invention relates to a halogen-free, flame-retardant rigid polyurethane foam, wherein a combination of oxalkylated alkylphosphonic acids and ammonium polyphosphate is present as flame retardant, and to a process for its production. The invention also relates to the use of oxalkylated alkylphosphonic acids in a mixture with ammonium polyphosphate for producing halogen-free, flame-retardant rigid polyurethane foams of this type.
Claims13
A halogen-free, flame-retardant rigid polyurethane foam, wherein a combination of oxalkylated alkylphosphonic acids and ammonium polyphosphate is present as flame retardant.
The use of oxalkylated alkylphosphonic acids of the formula I in a mixture with ammonium polyphosphate as halogen-free flame retardants for producing flame-retardant rigid polyurethane foam systems.
Dependencies are inferred from the claim text.