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|Title:||Photostabilizing effectiveness of new HALS produced by isocyanation of hindered piperidine derivatives|
|Authors:||Lau, W.W.Y. |
|Citation:||Lau, W.W.Y.,Pan, J.-Q. (1998-04). Photostabilizing effectiveness of new HALS produced by isocyanation of hindered piperidine derivatives. Polymer Degradation and Stability 60 (2-3) : 459-464. ScholarBank@NUS Repository.|
|Abstract:||Twelve new hindered-amine light stabilisers (HALS) were prepared by isocyanation of the hindered piperidine derivatives 2,2,6,6-tetramethyl-4-piperidinol, 1,2,2,6,6-pentamethyl-4-piperidinol and 4-amino-2,2,6,6-tetramethylpiperidine, by using dibutyltin dilaurate as catalyst. Test results show that these new HALS are effective light stabilisers, some of them comparable to a commercial HALS, Tinuvin-770. Reactions of these hindered piperidines with isocyanates proceed at temperatures varying from room temperature to 80°C and take less than 30 min to complete. The reactions are quantitative and no toxic byproducts are produced. © 1998 Elsevier Science Limited. All rights reserved.|
|Source Title:||Polymer Degradation and Stability|
|Appears in Collections:||Staff Publications|
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