High strength foam tool and method therefor

Details High strength foam tool and method therefor High strength foam tool and method therefor

C - Chemistry, Metallurgy

08

G

C08G 18/00 (2006.01) C08G 18/18 (2006.01) C08J 9/32 (2006.01)

Patent

CA 2536683

Disclosed is a closed-cell polyisocyanurate foam composition capable of high compressive strength at temperatures up to 200 ~C. The new composition further exhibits no loss or degradation in conventional mechanical properties - less than that which impacts the intended use. The formulation of the present invention is based on the reaction product of a isocyanate and an epoxide resin catalyzed by a mixture of a tertiary amine and a cyclic amine. Compressive strength is augmented by incorporating a large fraction of a non- reactive bulk filler into the precursor polymer gel.

L'invention se rapporte à une composition en mousse de polyisocyanurate à alvéole fermé présentant une force de compression élevée à des températures supérieures à 200 ·C. Cette nouvelle composition ne perd pas ou n'abîme pas les propriétés mécaniques habituelles, moins que celle qui agit sur l'utilisation recherchée. Cette formulation est à base du produit de réaction d'un isocyanate et d'une résine époxyde catalysés par un mélange d'une amine tertiaire et d'une amine cyclique. La force de compression est augmentée par incorporation d'une fraction élevée d'un agent de remplissage volumineux non réactif dans le gel polymère précurseur.

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