Novel diarylphosphinous acid aryl esters, a process for their preparation and their use for stabilizing plastics, in particular polyolefin molding compositions
CA 2074614 A1 · Owner: Bohshar, Manfred · Inventors: Kleiner, Hans-Jerg; Bohshar, Manfred; Regnat, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure: Novel diarylphosphinous acid aryl esters a process for, their preparation and their use for stabilizing plastics in particular polyolefin molding compositions Diarylphosphinous acid aryl esters of the formula (I) (I), where n = 1 or 2, in which R1 and R2 independently of one another, as monovalent radicals, are a phenyl or naphthyl radical, each of which can carry 1 to 5 substituents in, which the substituents are identical or different and are a nonaromatic hydrocarbon radical, an alkoxy radical alkylthio radical or dialkylamino radical having in each case 1 to 8 carbon atoms, aryl or aryloxy having in each case 6 to 10 carbon atoms or halogen having an atomic …
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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 July 24, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2014.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.