Phenolic foam

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 9/14 (2006.01) C08K 3/00 (2006.01) C08L 61/06 (2006.01)

Patent

CA 2621512

A phenolic foam is made by foaming and curing a foamable phenolic resin composition that comprises a phenolic resin, a blowing agent, an acid catalyst and an inorganic filler. The blowing agent comprises an aliphatic hydrocarbon containing from 1 to 8 carbon atoms and the inorganic filler is at least one selected from a metal hydroxide, a metal oxide, a metal carbonate and a metal powder. The phenolic foam has a pH of 5 or more. The phenolic foam has a higher pH value compared with conventional phenolic foam and reduces corrosion risk when in contact with metallic materials. The phenolic foam maintains excellent long-term stable thermal insulation performance, low water uptake and fire resistance performance and by using a hydrocarbon blowing agent, does not harm the environment as an ozone depleting or global warming material.

L~invention concerne une mousse phénolique obtenue par moussage et durcissement d'une composition de résine phénolique expansible comprenant une résine phénolique, un agent d'expansion, un catalyseur acide et des charges inorganiques. L~agent d~expansion comprend un hydrocarbure aliphatique contenant de 1 à 8 atomes de carbone et les charges inorganiques consistent en au moins un composant choisi parmi un hydroxyde métallique, un oxyde métallique, un carbonate métallique et une poudre métallique. La mousse phénolique a un pH de 5 ou plus. La mousse phénolique a une valeur de pH plus élevée que les mousses phénoliques conventionnelles et permet de réduire les risques de corrosion lors d~un contact avec des matériaux métalliques. La mousse phénolique conserve d~excellentes propriétés d~isolation thermique stables à long terme, une faible absorption de l~eau et une excellente résistance au feu. De plus, l~utilisation d~un agent d~expansion hydrocarboné permet à la mousse de ne pas être nocive pour l'environnement, contrairement aux matériaux appauvrissant la couche d'ozone ou contribuant au réchauffement de la planète.

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