C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 65/30 (2006.01) B01D 15/08 (2006.01) C08G 65/00 (2006.01) C08G 65/24 (2006.01)
Patent
CA 2081085
A process for separating from one another the non-functional, monofunctional and bifunctional species contained in perfluoropolyoxyalkylenes of general formula X-O-Rf-Y where: Rf = a perfluoropolyoxyalkylene chain comprising monomeric units of formulas (CF2O), (CF2CF2O), (CF2CF2CF2O), X, Y, like or different from each other, are non-functional end groups or end groups containing functions OH and/or NH2, with at least X and Y in parts of such perfluoropolyoxyalkylenes being or containing a group -OH, which consists in subjecting said perfluoropolyoxyalkylenes to column chroma- tography using, as eluents, non-polar fluorinated solvents, either alone or in admixture with polar solvents.
Gianotti Giuseppe
Levi Marinella
Tonelli Claudio
Turri Stefano
Ausimont S.p.a.
Mccarthy Tetrault Llp
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