Ampholytic, fluorine-containing esters of phosphorous acid and process for the manufacture thereof
CA 1074807 A · Owner: Hoechst Aktiengesellschaft · Inventors: Billenstein, Siegfried; Bathelt, Heinrich; Schuierer, Erich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure: Compounds of the formula, H, Rf - (CF=CH)m - (CH2)p - NR1R2 - Q - O - P - O O, wherein Rf is a perfluoroalkyl group of 3 to 16 carbon atoms R1 and R2 is hydrogen, lower alkyl of 1 to 4 carbon atoms cyclohexyl, 2-hydroxyalkyl, or Rf-(CF=CH)m-(CH2)p- Q is, -(CH2)x-, -CH2CHR-, or -CH2-CRR'-CH2- (R is lower alkyl or phenyl, R' is lower alkyl, phenyl or hydrogen) x is an integer, of 2 or 3, m is an integer of 0 or 1 and p is an integer of 1 to 4, are prepared by reacting florinated amines of the formula, Rf - (CF=CH)m - (CH2)p NR1R2, with cyclic phosphites of the formula these compounds are useful for lowering the surface tension in aqueous solutions and as wetting …
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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 April 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 1, 1997.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.