Patent ID: 6380275
Filing Date: 2002-04-30
Classification: C08G,C08J

Abstract:
A method for producing a polyurethane foam or a foamed thermoplastic synthetic resin by foaming a polyurethane or a thermoplastic resin with the aid of a blowing agent, wherein the blowing agent comprises a) pentafluorobutane, and b) at least one further blowing agent selected from the group consisting of low-boiling, aliphatic hydrocarbons selected from the group consisting of ethane, propane and butane; halogenated hydrocarbons; ethers and halogenated ethers; difluoromethane (HFC-32); difluoroethane; 1,1,2,2-tetrafluoroethane (HFC-134); 1,1,1,2-tetrafluoroethane (HFC-134a); pentafluoropropane; hexafluoropropane, and heptafluoropropane.