Process for the preparation of sterically hindered nitroxyl...

Details Process for the preparation of sterically hindered nitroxyl... Process for the preparation of sterically hindered nitroxyl...

C - Chemistry, Metallurgy

07

D

C07D 211/94 (2006.01) C07B 43/00 (2006.01)

Patent

CA 2655690

The present invention relates to a novel process for the preparation of a sterically hindered nitroxyl ether from the corresponding sterically hindered nitroxyl radical by reacting it with a carbonyl compound and a hydroperoxide. The compounds prepared by this process are effective stabilizers for polymers against harmful effects of light, oxygen and/or heat, as flame-retardants for polymers and as polymerization regulators.

La présente invention concerne un procédé innovant de préparation d'un éther de nitroxyle stériquement encombré à partir du radical nitroxyle stériquement encombré correspondant en le faisant réagir avec un composé de carbonyle et un hydropéroxyde. Les composés préparés par ce procédé sont des stabilisants efficaces pour les polymères contre les effets nuisibles de la lumière, de l'oxygène et/ou de la chaleur, en tant qu'ignifugeants pour les polymères et que régulateurs de polymérisation.

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