发明名称 |
RIGID POLYURETHANE-ISOCYANURATE REINFORCING FOAMS |
摘要 |
<p>A structural member is reinforced with a thermoset polymer foam having (a) a density of 80-650 kg/m3, (b) a storage modulus, measured on a 12 mm widex3.5 mm thickx17.5 single cantilever sample according to ASTM D 4065-01, under conditions of 1 Hz and a heating rate of 2° C./min, such that the ratio of the storage modulus at 0° C., expressed in MPa, divided by the density of the thermoset polymer foam, expressed in kg/m3, is at least 0.4, and (c) the ratio of the storage modulus of the thermoset polymer foam at 100° C. divided by the storage modulus of the thermoset polymer foam at 0° 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.</p> |
申请公布号 |
EP1868810(A1) |
申请公布日期 |
2007.12.26 |
申请号 |
EP20050851544 |
申请日期 |
2005.11.12 |
申请人 |
DOW GLOBAL TECHNOLOGIES INC. |
发明人 |
ALLEN, MARK, P.;LEKOVIC, HUZEIR;MIRYALA, SRIKANTH;BRAUN, ARNOLD, W., JR. |
分类号 |
B32B27/40;C08G18/02;C08G18/79 |
主分类号 |
B32B27/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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