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. 01, 1992
Filed:
Jan. 29, 1991
Applicant:
Inventors:
Giuseppe Marchionni, Milan, IT;
Anna Staccione, Milan, IT;
Assignee:
Ausimont S.r.L., Milan, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
20415792 ; 20415794 ; 20415788 ; 568601 ; 568416 ;
Abstract
Perfluoropolyethers having an acid end group of the type of acyl fluoride (or chloride) or a carboxylic group or derivatives thereof, the other end group being a perfluoroalkyl containing one or two halogen atoms different from fluorine, are prepared by photooxidation of C.sub.3 F.sub.6 and/or C.sub.2 F.sub.4, in the presence of a fully halogenated ethylene containing 1 to 4, preferably 1 or 2 atoms of halogen different from fluorine, and by the subsequent thermal of photochemical decomposition treatment of the peroxide groups which are present in the photooxidation product.