Extruded styrene resin foams and methods for producing the same

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 9/14 (2006.01) C08J 9/00 (2006.01)

Patent

CA 2356917

An extruded foam obtained by subjecting a styrene resin to extrusion foaming and excellent in suitability for the environment and in flame retardancy and heat-insulating properties. It is characterized by having been obtained with one or more foaming agents comprising 100 to 10 wt.% at least one C3-5 saturated hydrocarbon and 0 to 90 wt.% other foaming agent based on all the foaming agents and by containing (A) a halogenated flame retardant and (B) at least one compound selected from the group consisting of phosphorus compound flame retardants having a nitrogen atom in the molecule, tetrazole compounds, cyanuric acid and derivatives thereof, isocyanuric acid and derivatives thereof, metal borates, and boron oxide.

L'invention concerne une mousse extrudée obtenue par moussage par extrusion d'une résine styrène. Cette mousse est parfaitement adaptée à l'environnement et a d'excellentes propriétés de retardateur et d'isolant thermique. L'invention est caractérisée en ce que cette mousse est obtenue à partir d au moins un gonflant comprenant 100 à 10 % en poids d'au moins un hydrocarbure saturé C3-5 et 0 à 90 % en poids d'un autre gonflant basé sur tous les gonflants et en ce qu'elle contient (A) un retardateur de flamme halogéné et (B) au moins un composé sélectionné dans le groupe constitué de retardateurs de flamme à composé phosphoré ayant un atome d'azote dans la molécule, de composés de tétrazole, de l'acide cyanurique et ses dérivés, de l'acide isocyanurique et ses dérivés, des borates métalliques et des oxydes de boron.

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