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Photoprotective agents for wool. Synergism between UV absorbers and antioxidants
Author(s) -
Carr C. M.,
Leaver I. H.
Publication year - 1987
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1987.070330620
Subject(s) - wool , phenols , phenol , chemistry , materials science , phosphonate , steric effects , photosensitivity , nuclear chemistry , photochemistry , organic chemistry , polymer chemistry , composite material , optoelectronics
Several antioxidants alone, and in combination with sulfonated UV absorbers, have been evaluated as photoprotective agents for wool. Mixtures of phenolic antioxidants and sulfonated UV absorbers of the 2‐hydroxyphenylbenzotriazole class were found to exhibit synergistic behavior; the most effective UV absorber also gave the strongest synergistic effect with the antioxidants. Of the systems studied, the hindered phenol, calcium bis ((ethyl‐(3,5‐di‐ t ‐butyl‐4‐hydroxybenzyl)‐phosphonate)) (Irganox 1425), when used in conjunction with a sterically hindered benzotriazolesulphonate, afforded wool the best protection against photoyellowing and phototendering in sunlight, behind window glass. Sulfonated derivatives of hindered phenols acted synergistically with UV absorbers when treated fabrics were exposed to an artificial light source, but not when fabrics were exposed to sunlight through glass.