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:
Sep. 29, 2015
Filed:
Oct. 23, 2012
Applicant:
Solvay Specialty Polymers Italy S.p.a., Bollate, IT;
Inventors:
Claudio Adolfo Pietro Tonelli, Paderno D'adda, IT;
Roberto Valsecchi, Osio Sopra, IT;
Fabrizio Mutta, Fino Mornasco, IT;
Assignee:
SOLVAY SPECIALTY POLYMERS ITALY S.P.A., Bollate (Milano), IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 65/48 (2006.01); C08G 65/30 (2006.01); C08G 65/00 (2006.01); C08G 65/46 (2006.01);
U.S. Cl.
CPC ...
C08G 65/48 (2013.01); C08G 65/007 (2013.01); C08G 65/30 (2013.01); C08G 65/46 (2013.01);
Abstract
The present invention relates to a process for increasing the content of bifunctional species in mixtures 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.