Composition of, and method of spraying, a foam-forming...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 9/08 (2006.01) B29C 44/02 (2006.01)

Patent

CA 2211862

A sprayable, foam-forming, phenolic resin composition having the combination of properties of: (i) a viscosity suitable for spraying, (ii) a cure rate suitable for spraying to prevent running or sagging of sprayed foam, (iii) which when suitably cured provides a foam having a high temperature resistance, and (iv) the cured foam produces substantially non-toxic fumes when burned. The sprayable, foam-forming, phenolic resin composition is made from a phenol-aldehyde resin; optionally a phenol compound; a catalyst for catalyzing a curing reaction of said phenol-aldehyde resin; and a gas- generating compound which generates a gas during said curing reaction of said phenol-aldehyde resin. The invention also provides a method for making a phenolic-resin foam layer and a sprayed phenolic-resin foam layer.

L'invention porte sur une résine phénolique pulvérisable et expansible réunissant les propriétés suivantes: (i) viscosité adaptée à la pulvérisation; (ii) vitesse de durcissement adaptée à la pulvérisation et empêchant les coulures et l'affaissement de la résine une fois projetée; (iii) produit expansé correctement durci résistant à de fortes températures; et (iv) produit expansé correctement durci dont la combustion ne dégage pratiquement pas de fumées toxiques. Ladite composition comprend une résine phénolaldéhyde, d'un composé phénolé facultatif, d'un catalyseur durcisseur de la résine, et un composé produisant du gaz pendant le durcissement de la résine. L'invention porte également sur un procédé d'obtention d'une couche de résine phénolique expansée et d'une couche de résine phénolique expansée pulvérisée.

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