Deformable, rigid polystyrene foam board

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 9/00 (2006.01) C08L 25/06 (2006.01)

Patent

CA 2616142

Provided are methods for producing a high strength, but easily deformed, polystyrene foam board that can endure repeatedly deformations from its original configuration into more complex curved shapes without damaging the board integrity or substantially reducing its structural strength. Also provided are rigid polystyrene foam boards produced by this method that exhibit improved bending and impact resistance while substantially retaining or improving other properties, for example, the thermal dimensional stability and fire resistance, exhibited by corresponding conventional XPS foam boards. The foamable compositions may incorporate one or more of a variety of polymer processing aids for the purpose of altering the performance of the final foam products, thereby allowing the properties of the final foam product to be customized to some degree.

L'invention concerne des procédés qui permettent de produire un panneau en mousse de polystyrène à haute résistance, mais facilement déformable, capable de subir des déformations répétées à partir de sa configuration d'origine en des formes courbes plus complexes sans dommage pour l'intégrité du panneau et sans réduction sensible de sa résistance structurelle. L'invention porte également sur des panneaux en mousse de polystyrène rigide produits selon le procédé précité, qui offrent un pliage et une résistance aux chocs améliorés tout en conservant, de manière parfois sensiblement améliorée, d'autres propriétés comme, par exemple, la stabilité dimensionnelle à la chaleur et la résistance au feu, présentées par les panneaux en mousse XPS classiques correspondants. Les compositions de mousse de l'invention peuvent renfermer un ou plusieurs additifs parmi une variété d'additifs facilitant le traitement des polymères afin de modifier la performance des produits finis en mousse, permettant de la sorte un certain degré de personnalisation des propriétés du produit fini en mousse.

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