Inventors:
Janice M. Nyberg - Witchita KS
Eric L. Mainz - Goddard KS
Assignee:
Vulcan Chemicals a division of Vulcan Materials Company - Birmingham AL
International Classification:
C08G 1810
US Classification:
521170, 510408, 510412, 510415, 521131, 521155, 521172, 521173, 521174
Abstract:
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.