C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/00 (2006.01) C08J 9/04 (2006.01) C08J 9/14 (2006.01)
Patent
CA 2472929
A composition useful as a blowing agent having no flash point or reduced combustibility comprising 2-chloropropane and a gas selected from the group consisting of a fluorohydrocarbon, perfluorocarbons, fluoroethers, hydrofluoropolyethers and mixtures thereof is disclosed. A polyisocyanurate foam or a polyurethane modified polyisocyanurate foam having a mainly closed cell structure and also a method for preparing this foam, the latter comprising closed cells wherein a foam blowing agent consisting of a mixture of 2-chloropropane and one or more HFC compounds including pentafluoropropane, pentafluorobutane, heptafluoropropane, hexafluoropropane or pentafluoroethane are disclosed. Pentanes can be added if desired. Azeotropic mixtures in which 2~-chloropropane is an ingredient are disclosed.
Cette invention concerne une composition utile en tant qu'agent soufflant n'ayant pas de point d'~clair ou pr~sentant une combustibilit~ r~duite, qui comprend du 2-chloropropane et un gaz pris dans le groupe compos~ d'un fluorohydrocarbure, de perfluorohydrocarbures, de fluoro~thers, d'hydrofluoropoly~thers seuls ou m~lang~s. L'invention concerne ~galement une mousse de polyisocyanurate ou une mousse de polyisocyanurate modifi~ polyur~thane ~ la cellule cellulaire essentiellement ferm~e ainsi qu'un proc~d~ d'obtention de cette mousse, ces dernires comprenant des cellules ferm~es, ainsi qu'un agent gonflant pour mousse fait d'un m~lange de 2-chloropropane et d'un ou de plusieurs compos~s d'hydrocarbure fluor~ dont le pentafluoropropane, le pentafluorobutane, l'heptafluoropropane, l'hexafluoropropane ou le pentafluoro~thane. Des pentanes peuvent Útre ajout~s au besoin. Sont ~galement d~crits des m~langes az~otropiques dans la composition desquels entre le 2-chloropropane.
Mainz Eric L.
Nyberg Janice M.
Basic Chemicals Company Llc
Gowling Lafleur Henderson Llp
Vulcan Chemicals
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