It is known that dibenzoylmethane and its derivatives are relatively sensitive to ultraviolet radiation and they decompose rapidly under the effect of sunlight.
已知的是，二苯甲酰甲烷及其衍生物对紫外辐 射相对敏感，且它们在日光作用下迅速分解。
2
This invention also relates to a light stabilizing method for at least one dibenzoylmethane derivative with effective amounts of at least one dithiolane compound (I).