Title:
PROCESS FOR ENRICHING THE DIFUNCTIONAL CONTENT OF (PER)FLUOPOLYETHER MIXTURES
Document Type and Number:
WIPO Patent Application WO/2013/060658
Kind Code:
A1
Abstract:
The present invention relates to a process for increasing the content of bifunctional species in nnixtures of non functional, mono- and bifunctional (per)fluoropolyethers which comprises the adsorption of a (per)fluoropolyether mixture onto an adsorbing stationary phase, a first desorption step with a supercritical fluid only and a second desorption step with the supercritical fluid and a mixture of a polar solvent.
Inventors:
TONELLI CLAUDIO ADOLFO PIETRO (IT)
VALSECCHI ROBERTO (IT)
MUTTA FABRIZIO (IT)
VALSECCHI ROBERTO (IT)
MUTTA FABRIZIO (IT)
Application Number:
PCT/EP2012/070916
Publication Date:
May 02, 2013
Filing Date:
October 23, 2012
Export Citation:
Assignee:
SOLVAY SPECIALTY POLYMERS IT (IT)
International Classes:
C08G65/00; C08G65/30
Domestic Patent References:
| WO2010130628A1 | 2010-11-18 | |||
| WO2010130628A1 | 2010-11-18 |
Foreign References:
| JP2001164279A | 2001-06-19 | |||
| US20030100454A1 | 2003-05-29 | |||
| US20040092406A1 | 2004-05-13 | |||
| US6099937A | 2000-08-08 | |||
| US5246588A | 1993-09-21 | |||
| US5262057A | 1993-11-16 | |||
| US7288682B2 | 2007-10-30 | |||
| EP0822216A2 | 1998-02-04 | |||
| JP2001164279A | 2001-06-19 | |||
| US20040092406A1 | 2004-05-13 | |||
| US20030100454A1 | 2003-05-29 | |||
| US6099937A | 2000-08-08 |
Other References:
SCHONEMANN, H. ET AL.: "Tailoring performance properties of perfluoro-polyethers via supercritical fluid fractionation", PROC. 3RD LNT. SYMP. ON SUPERCRITICAL FLUIDS, vol. 3, 17 October 1994 (1994-10-17), pages 375 - 380
Attorney, Agent or Firm:
BENVENUTI, Federica et al. (310, Bruxelles, BE)
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Claims:
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