Long wavelength shifted benzotriazole UV-absorbers and their use

摘要

This invention relates to novel benzo having a long wavelength shifted absorption spectrum with a significant absorbance in the 410 to 420nm or less relates to triazole UV absorbers . In addition , aspects of the invention is the use of a preparation method thereof , containing the novel UV absorber novel compounds as UV light absorbers for UV -stabilized compositions and organic material . ; formula I ; formula II