Extruded styrene resin foams and methods for producing the same

   
   

An extruded styrene resin foam obtained by extrusion-foaming of a styrene resin and excellent in environmental compatibility and excellent in flame retardant property and thermal insulating property, characterized in that it contains, as a blowing agent, 100 to 10% by weight of at least one of saturated hydrocarbons having 3 to 5 carbons and 0 to 90% by weight of other blowing agent, based on the total amount of the blowing agent, and contains (A) a halogenated flame retardant and (B) at least one compound selected from the group consisting of phosphorus type flame retardants containing nitrogen atom in a molecule, tetrazole compounds, cyanuric acid and derivatives thereof, isocyanuric acid and derivatives thereof, metal borates, and boron oxides.

Uma espuma expulsa da resina do styrene obtida extrusão-espumando de uma resina do styrene e excelente na compatibilidade ambiental e excelente na propriedade retardadora da flama e propriedade isolando térmica, caracterizado que contem, como um agente fundindo, 100 a 10% pelo peso ao menos de um dos hidrocarbonetos saturated que têm 3 a 5 carbonos e 0 a 90% pelo peso do outro agente fundindo, baseado na quantidade total do agente fundindo, e contem (A) um retardador halogenated da flama e (B) ao menos um composto selecionou do tipo consistindo retardadores do phosphorus do grupo da flama que contêm o átomo do nitrogênio em uma molécula, tetrazole combina, ácido cyanuric e derivatives disso, isocyanuric ácido e derivatives disso, boratos do metal, e óxidos do boro.

 
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