Stabilization of polyalkoxylate nonionic surfactants
CA 1069519 A · Owner: Basf Wyandotte Corporation · Inventors: Login, Robert B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Liquid polyalkoxylate nonionic surfactant compositions are obtained that display improved stability when exposed to air at moderately elevated temperatures such as, 190 to 250°C. These compositions differ from those made and used in accordance with prior art in that they contain a significant and effective amount of ions of a metal pref-, erably an alkali metal such as potassium or sodium; and desirably, they do not contain anions of relatively nonvolatile nature, such as phosphate, but rather to the, extent that anions are present they are of volatile nature, such as acetate propionate, butyrate, valerate or, hexanoate. Such surfactant compositions of improved stability can be made, for …
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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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.