Dow Global Technolgoies LLC

Srikanth Miryala

Mark P Allen

Huzeir Lekovic

Arnold W Braun, Jr

A structural member is reinforced with a thermoset polymer foam having (a) a density of 80-650 kg/m, (b) a storage modulus, measured on a 12 mm wide&#xd7;3.5 mm thick&#xd7;17.5 single cantilever sample according to ASTM D 4065-01, under conditions of 1 Hz and a heating rate of 2&#xb0; C./min, such that the ratio of the storage modulus at 0&#xb0; C., expressed in MPa, divided by the density of the thermoset polymer foam, expressed in kg/m, is at least 0.4, and (c) the ratio of the storage modulus of the thermoset polymer foam at 100&#xb0; C. divided by the storage modulus of the thermoset polymer foam at 0&#xb0; C. is at least 0.5. The foam is preferably a polyurethane-isocyanurate foam. The foam exhibits excellent resistance to cracking due to mechanical and thermal stresses.

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Srikanth Miryala