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AssigneeVulcan Chemicals, Division of Vulcan Materials Company
InventorsJanice M. Nyberg, Eric L. Mainz
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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.
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 perfluorocarhons, hydrofluoropolyethers and mixtures thereof.
A composition useful as a blowing agent having no flash point or reduced combustibility comprising 2-chloropropane and a fluoroether selected from the group consisting of bis(2,2,2trifluoroethyl)ether, n-butyl 1,1,2,2-tetrafluoroethyl ether, difluoromethyl 2,2,2-trifluoroethyl ether, ethyl 1,1,2,2 tetrafluoroethyl ether, 1,1,1,3,3,3 hexafluoro-2-(fluoromethoxy) propane and mixtures thereof.
A composition useful as a blowing agent having no flash point or reduced combustibility comprising 2-chloropropane and a mixture of methyl nonafluoroisobutyl ether and methyl nonafluorobutyl ether.
A composition useful as a blowing agent having no flash point or reduced combustibility comprising 2-chloropropane and a fluorohydrocarbon selected from the group consisting of 1,1,1,3,3 pentafluoropropane, 1,1,1,2,3,3,3 heptafluoropropane, 1,1,1,3,3,3 hexafluoropropane and mixtures thereof.
An azeotrope-like mixture at one atmosphere comprising about 50-60% 2-chloropropane and about 40-50% 1,1,1,3,3 pentafluorobutane.
An azeotrope-like mixture at one atmosphere of presure comprising about 78% 2-chloropropane and about 22% of a mixture of methyl nonafluoroisobutyl ether and methyl nonafluorobutyl ether.
A method for preparing mainly closed, cell shaped polyisocyanurate foam or polyurethane modified polyisocyanurate foam, wherein foam formation is performed with the use of a physical blowing agent comprising 2-chloropropane along wit a mixture of methyl nonafluoroisobutyl ether and methyl nonafluorobutyl ether which lowers the combustibility of the 2-chloropropane.
Dependencies are inferred from the claim text.