Fire-retardant low-density epoxy composition

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 13/02 (2006.01) C08G 59/00 (2006.01) C08L 63/00 (2006.01)

Patent

CA 2592305

The present invention relates to a curable precursor of a fire-retardant, low- density and essentially halogen-free epoxy composition comprising (i) 10 to 70 weight percent of at least one organic epoxide compound with an epoxide functionality of at least one, (ii) 1 to 55 weight percent of at least one epoxide hardener, (iii) 5 to 50 weight percent of an essentially halogen-free fire-retardant system that includes a mixture of: (1) at least one compound selected from the group comprising alkaline earth metal hydroxides and aluminium group hydroxides, and (2) at least one phosphorous-containing material, (iv) 10 to 60 weight percent of a filler system capable of reducing the density of the precursor that includes a mixture of (1) at least one low- density inorganic filler having a density of between 0.1 to 0.5 g cm-3, (2)at least one low-density organic filler having a density of between 0.01 to 0.30 g/cm-3 and being compressible.

La présente invention concerne un précurseur réticulable d~un produit ignifuge, une composition époxy essentiellement exempte d~halogène et de faible densité comprenant (i) de 10 à 70 % en poids d~au moins un composé époxy organique ayant une fonctionnalité époxy d~au moins un, (ii) de 1 à 55 % en poids d~au moins un agent de durcissement époxy, (iii) de 5 à 50 % en poids d~un système ignifuge essentiellement exempt d~halogène incluant un mélange de : (1) au moins un composé choisi parmi le groupe comprenant des hydroxydes de métal alcalino-terreux et des hydroxydes du groupe aluminium et (2) au moins un matériau contenant du phosphore, (iv) de 10 à 60 % en poids d~un système de charge capable de réduire la densité du précurseur qui comprend un mélange de (1) au moins une charge inorganique de faible densité présentant une densité comprise entre 0,1 et 0,5 g cm3, (2) au moins une charge organique de faible densité présentant une densité comprise entre 0,01 et 0,30 g/cm3 et étant compressible.

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