Process for the preparation of sulfoalkyl quarternary salts
CA 1182115 A · Owner: Agfa-Gevaert Aktiengesellschaft · Inventors: Kampfer, Helmut; Glass, Max; Hase, Marie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Tertiary amines corresponding to the formula in which, Y represents hydrogen, halogen a saturated or unsaturated aliphatic, group having up to 6 carbon atoms an alkoxy or alkylthio group, or mercapto; Z represents the atoms required to complete a heterocyclic group comprising at least one 5-membered or 6-membered heterocyclic ring; and m is 0 or 1;, may be quaternized by heating them with a sulfoalkylating agent of this invention to a temperature of from 100 to 250°C to form a sulfobetaine corresponding to the formula III, in which, Y, Z, R and m have the meanings already indicated. The sulfoalkylating agents which are believed to be hydroxy alkane sulfonic acid sulfoalkyl esters are free …
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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 February 5, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 2002.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.