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:
Jul. 22, 2014
Filed:
Feb. 16, 2011
Pier Antonio Guarda, Milan, IT;
Giuseppe Marchionni, Milan, IT;
Pier Antonio Guarda, Milan, IT;
Giuseppe Marchionni, Milan, IT;
Solvay Solexis S.p.A., Milan, IT;
Abstract
Linear perfluoropolyethers of formula:T-O (CFO)(CFCFO)(CFCFCFO)(CFCFCFCFO)-T  (I)wherein n, m, r, s are integers such that the polymer number average molecular weight is comprised between 700 and 100,000 and the n/(n+m+r+s) ratio ranges from 0.05 to 0.40, and respective preparation process by addition of a peroxidic perfluoropolyether of formula (III):T-O(CFO), (CFCFO), (O)-T  (III)having a PO from 1.8 to 4, to a perfluoropolyether oil preheated at a temperature comprised between 150° C. and 250° C. and subsequent exhaustive fluorination of the obtained compound.