The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2002
Filed:
May. 21, 1999
Werner Kruecke, Hannover, DE;
Lothar Zipfel, Laatzen, DE;
Solvay Fluor und Derivate GmbH, Hannover, DE;
Abstract
A method for the production of polyurethane foams and of thermoplastic foams is described. As blowing agent, a composition is used, which contains or consists of pentafluorobutane, preferably pentafluorobutane (HFC-365mfc) and at least one further blowing agent selected from the group comprising; difluoromethane (HFC-32); difluoroethane, preferably 1,1-difluoroethane (HFC-152a); 1,1,2,2-tetrafluoroethane (HFC-134); 1,1,1,2-tetrafluoroethane (HFC-134a); hexafluoropropane, preferably 1,1,1,3,3,3-hexafluoropropane (HFC-236fa); 1,1,2,3,3,3-hexafluoropropane (HFC-236ea) and heptafluoropropane, preferably 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), low-boiling, optionally halogenated hydrocarbons and/or low-boiling, optionally halogenated ethers.