| 摘要 |
A coating composition comprising a) a film-forming material b) a stabilizing effective amount of a light stabilizing composition which comprises a blend of at least one diphenyloxamine of the formula halogen; R2 is hydrogen, alkyl, alkoxy, halogen, phenyl or phenoxy; and R3 and R4 are hydrogen, alkyl or alkoxy and at least one selected tetraalkylpiperidine. In a preferred embodiment, a benzotriazole is also present in the light stabilizing composition. The coating compositions are especially useful for the automotive market. The invention further relates to a method for enhancing the light stability of coatings comprising adding to the solids content of the coating composition a stabilizing quantity of the above-mentioned light stabilizing composition. The invention also relates to the corresponding stabilized coating film.
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