Vapor phase soldering using certain perfluorinated polyethers
申请人:Monsanto Company
公开号:EP0326539A1
公开(公告)日:1989-08-02
A perfluorinated polyether having the formula RfO-(CF₂CF₂O)n-R′f wherein n=3-11 and Rf and Rf′ are perfluroinated C₁-C₅ alkyl radicals is used in vapor phase soldering applications. Especially useful for such applications is perfluoroheptaglyme.
Novel perfluorinated polyethers and process for their preparation
申请人:Monsanto Company
公开号:EP0332601A1
公开(公告)日:1989-09-13
Perfluorinated polyethers having the formula
RfO-(CF₂CF₂O)n-R′f
wherein n is an integer of 1-11 and each of Rf and R′f is a perfluorinated C₁-C₅-alkyl radical, dimers of such polyethers and carbon to carbon intramolecularly coupled cyclic derivatives of such polyethers are produced by direct fluorination of the polyethers in an inert solvent. Compositions of the perfluorinated polyethers and their derivatives are useful as functional fluids.