Hydrocarbon or hydrofluorocarbon blown astm e4-84 class i...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/40 (2006.01) C08G 18/48 (2006.01) C08J 9/14 (2006.01) C08K 5/521 (2006.01)

Patent

CA 2608008

The present invention provides a rigid polyurethane foam formed by the reaction product, at an isocyanate index of about 160 or less, of a polyisocyanate, a polyol component containing an aromatic polyester polyol, and a sucrose-initiated polyether polyol and a flame retardant component made from a chlorine-containing combustion modifier and a bromine-containing combustion modifier in the presence of a hydrocarbon or hydrofluorocarbon blowing agent. The inventive polyurethane foam contains, based on the weight of the foam, at least about 3 wt.% chlorine, from about 1 wt.% to about 2 wt.% bromine and less than about 1 wt.% phosphorus, and exhibits good properties, good processing and good adhesion to metal whilst satisfying the ASTM E-84 Class I burn requirement.

La présente invention concerne une mousse de polyuréthanne rigide constituée du produit de réaction contenant, à un indice isocyanate d'environ 160 ou moins, un polyisocyanate, un constituant polyol contenant un polyester polyol aromatique ainsi qu'un polyéther polyol initié par sucrose et un constituant ignifuge produit à partir d'un modificateur de combustion contenant du chlore et un modificateur de combustion contenant du brome en la présence d'un agent gonflant hydrocarboné ou hydrofluorocarboné. La mousse polyuréthanne de l'invention contient, sur la base du poids de la mousse, au moins environ 3 % en poids de chlore, environ 1 % en poids à environ 2 % en poids de brome et moins d'environ 1 % en poids de phosphore, elle présente de bonnes propriétés, une bonne aptitude au traitement et une bonne adhésion au métal tout en satisfaisant la condition de combustion ASTM E-84 classe I.

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