2H-Benzotriazole UV absorbers substituted at the 3-position and/or the 5-position of the phenyl ring by .alpha.-cumyl moiety which is substituted by a heteroatom are particularly photostable in automotive coatings, and are of low color and exhibit low volatility in thermoplastic compositions.

los amortiguadores UV 2H-Benzotriazole substituidos en el 3-position y/o el 5-position del anillo fenilo por el moiety del alpha.-cumyl que es substituido por un heteroatom es particularmente photostable en capas automotoras, y está de color bajo y exhiben volatilidad baja en composiciones termoplásticas.

 
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