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The evaluation of the following ultraviolet light absorbers in PVC is described: 2‐(2'‐pentadecyl‐4'‐hydroxy‐phenyl)‐benzotriazole, 2‐(2'‐pentadecyl‐3'‐carboxy‐4'‐hydroxy‐phenyl)‐benzotriazole, 2‐(2'‐hydroxy‐4'‐pentadecyl‐5'‐chloro‐phenyl)‐benzotriazole. 2‐hydroxy‐4‐pentadecyl‐benzophenone, nickel complex of di‐(4‐pentadecyl‐6‐hydroxy‐phenyl)‐sulfide, and 3‐pentadecyl‐phenyl‐salicylate.
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Ghatge et al. (1971) studied this question.
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