Process for preparing polyorganosiloxane emulsions
CA 2335167 A1 · Owner: Goldschmidt Gmbh · Inventors: Silber, Stefan; Sucker, Roland
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for preparing polyorganosiloxane emulsions whose internal phase comprises the active polyorganosiloxane substance and whose external phase comprises, in solution or dispersion, an emulsifier or an emulsifier mixture and if desired; an emulsion-stabilizing protective colloid to the polysiloxane emulsions thus obtainable and in, particular, to the use of these macroemulsions so, prepared, as defoamers. A first embodiment of the invention relates to a process for preparing polyorgano siloxane emulsions which comprises, a) formulating a mixture from: from 5 to 50% by weight of polyorganosiloxanes optionally comprising hydrophobic solid bodies from 0 to 20% by …
Read the whole patent
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
- Filed February 9, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 9, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
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.