Inhibiting polymerization of vinyl aromatic monomers

Details Inhibiting polymerization of vinyl aromatic monomers Inhibiting polymerization of vinyl aromatic monomers

C - Chemistry, Metallurgy

07

D

C07D 211/94 (2006.01) C07B 63/04 (2006.01) C07C 7/20 (2006.01) C07C 15/44 (2006.01) C07C 15/46 (2006.01) C07C 207/02 (2006.01) C07C 291/02 (2006.01) C07C 309/29 (2006.01) C07D 209/44 (2006.01) C07D 241/08 (2006.01) C07D 401/00 (2006.01) C09K 15/30 (2006.01)

Patent

CA 2223043

When a nitroxyl compound is heated in an oxygen-free atmosphere with a vinyl aromatic monomer at 50-140°C for up to 60 days, it forms an activated inhibitor mixture which is superior to the nitroxyl compound itself in preventing the premature polymerization of a vinyl aromatic monomer during its processing and purification.

Lorsqu'un composé nitroxylé est chauffé pendant 60 jours ou moins, à 5-140 degrés C, dans une atmosphère sans oxygène, avec un monomère aromatique vinylique, il se forme un mélange inhibiteur activé, qui empêche la polymérisation prématurée du monomère aromatique vinylique lors de son traitement et de sa purification, plus efficacement que le composé nitroxylé lui-même.

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