Use of n,n-dialkylhydroxylamines and their preparation
CA 1325224 C · Owner: Cortolano, Frank P. · Inventors: Pastor, Stephen D.; Cortolano, Frank P.; Ravichandran, Ramanathan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Use of N,N-dialkylhydroxylamines and their preparation Abstract of the Disclosure, The compounds of the formula (I) (I), wherein R1 and R2 are independently alkyl of 8 to 36 carbon atoms are, useful for stabilizing a poly(arylene sulfide) resin a modified poly-, styrene or a polymer containing a diene component against thermal oxidative or actinic degradation. N,N-Dialkylhydroxylamines of the formula (I) can be prepared by an improved process involving a reverse Michael reaction of the N-oxides of the corresponding .beta.-dialkylaminopropionic esters amides or nitriles or, of .beta.-dialkylaminosuccinyl esters or imides. N,N-Dialkylhydroxylamines of the formula (I) can also be prepared by …
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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 December 14, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 2010.
- 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
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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.