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:
Mar. 28, 1978
Filed:
Sep. 22, 1975
Robert Ernest Dear, Mount Kisco, NY (US);
Thomas W Cook, Yorktown Heights, NY (US);
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
The invention is directed to a process for the preparation of concentrated solutions of fluorinated surfactants of the formula ##STR1## wherein R.sub.f is a perfluoroalkyl or perfluoroalkoxy-perfluoroalkyl group, R.sup.1 is a branched or straight chain alkylene, alkylenethioalkylene, alkyleneoxy-alkylene or alkyleneiminoalkylene group, X is oxygen or an amino group, Q is an organic group containing at least one amino group and y is zero or 1, said process comprising (a) reacting an aqueous solution of an amine with an anhydride previously dissolved in an anhydrous water miscible organic solvent, dissolved in an anhydrous water miscible organic solvent, and (b) reacting the intermediate obtained from the first reaction with an R.sub.f -thiol in the presence of a non-reactive water miscible thiol solvent.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile