Production of polyetherols using aluminum phosphonate catalysts
CA 2406995 A1 · Owner: Basf Corporation · Inventors: Dexheimer, Edward M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the production of polyetherols is disclosed. The method includes the, utilization of aluminum phosphonate catalysts for the formation of the very low unsaturation, polyether polyols. The aluminum phosphonate catalyst preferably has a general structure of, RPO-(OA1R'R")2, wherein O represents oxygen P represents pentavalent , phosphorous Al, represents aluminum, R comprises a hydrogen an alkyl group, or an aryl group, and R' and R" independently comprise a halide, an alkyl group an alkoxy group, an aryl , group, or an aryloxy group. Polyols produced according to the disclosed procedure have properties, identical to or more beneficial than those produced utilizing the typical …
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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
- Filed October 8, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 8, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2024.
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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.