Fluorine-containing alkyl-sulfato-betaines and processes for their manufacture
CA 1112661 A · Owner: Hoechst Aktiengesellschaft · Inventors: Ehrl, Winfried; Billenstein, Siegfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Fluorine-containing alkyl-sulfato-betaines of the formula in which Rf is perfluoroalkyl with 3 to 16 C atoms R1 is alkyl, with 1 to 4 C atoms, R2 is alkyl with 1 to 4 C atoms Q is, -CH2-CH2- or , m is numbers 0 or 1 and if m is 0, p is an integer from 1 to 4 and if m is 1, p is the number 1, are prepared by reacting a compound of the formula in which Rf, Q, m and p are as defined above with at least one, known sulfating agent at -30 to +60°C in the presence of at least one solvent (a) which dissolves the above-mentioned amine and does not react with the sulfating agent dissolving the, resulting product, after removing the solvent (a) in at least, one polar solvent (b), neutralizing the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 1998.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.