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Hindered amine light stabilizers nitroxide

Hindered amine light stabilizers have attracted enormous scientific and commercial interest due to their efficiency as photo-antioxidants. The stabilization process in the presence of HALS involves the interference of secondary >NH or tertiary (>NCH3) groups with hydroperoxides POOH generated by oxidation chain mechanism of polymer alkyl radicals P. HALS-derived nitroxides >NO, formed through scavenging peroxyls POO by hydroxylamine species >NOH, are the key intermediates in the HALS stabilization mechanism because they are able to quench alkyl radicals arising in the initiation step of oxidation [100, 101]. The involvement of HALS in the stabilization process can be attributed to their ability to remain an... [Pg.32]

The second category is that of free radicals traps. For example, hindered amines are excellent light-stabilizing compounds their oxidation generates stable free radicals called nitroxide that are able to efficiently trap reactive free radicals. Very recently, such nitroxide radicals were used to prevent a... [Pg.375]

See other pages where Hindered amine light stabilizers nitroxide is mentioned: [Pg.119]    [Pg.120]    [Pg.121]    [Pg.133]    [Pg.149]    [Pg.149]    [Pg.124]    [Pg.1008]    [Pg.281]    [Pg.287]    [Pg.257]    [Pg.277]    [Pg.130]    [Pg.50]    [Pg.68]    [Pg.121]    [Pg.118]    [Pg.1402]   
See also in sourсe #XX -- [ Pg.130 , Pg.132 ]



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Amine hindered

Amine light stabilizers

Amine stabilizers

Hinder amine light stabilizer

Hindered

Hindered amine light

Hindered amine light stabilizers

Hindered amine light stabilizers stability

Hindered amine stabilizers

Hindered amine stabilizers stabilization

Hindered light stabilizers

Light stability

Light stabilization

Light stabilizers

Nitroxide

Nitroxides

Nitroxides stability

Stabilization light stabilizers

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