Composite elements having improved resistance against stress...

Details Composite elements having improved resistance against stress... Composite elements having improved resistance against stress...

B - Operations, Transporting

32

B

117/161, 154/123

B32B 5/18 (2006.01) B32B 5/20 (2006.01) C08J 9/14 (2006.01)

Patent

CA 2013848

COMPOSITE ELEMENTS HAVING IMPROVED RESISTANCE AGAINST STRESS CRACKING CORROSION, MOST PREFERABLY FOR LOW TEMPERATURE HOUSING COMPARTMENTS Abstract of the Disclosure The invention deals with composite elements having improved resistance against stress cracking corrosion especially for low temperature housing compartments, comprising: A) at least one top layer of polystyrene, preferably toughened polystyrene, having certain mechanical properties; and B) a layer of polyurethane foam, preferably polyurethane rigid foam; said polyurethane rigid foam prepared while using difluorochloromethane as a blowing agent or a blowing agent mixture which essentially comprises water, difluorochloromethane, and optionally trichlorofluoromethane. -41-

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