High molecular weight nonpolar benzotriazoles
AssigneeBASF SE
InventorsSylke Haremza, Andrea Misske, Simon Schambony, Alban Glaser
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Abstract
The present invention relates to the use of certain benzotriazole derivatives of the general formula (I) where B is an optionally substituted 2-(2-hydroxyphenyl)-2H-benzotriazole group, n is an integer from the range from 3 to 20 and A is an n-valent organic radical, as UV absorber or stabilizer in inanimate organic materials. Furthermore, the invention relates to methods of stabilizing inanimate organic materials, in particular plastics, against the effect of light using specific benzotriazole derivatives. Further subject matters of the invention are certain benzotriazole derivatives and inanimate organic materials comprising certain benzotriazole derivatives.
Claims26
A method of stabilizing an inanimate organic material, comprising combining the inanimate organic material with a UV absorber or stabilizer, which comprises:
- a benzotriazole of formula (I)
- wherein B is an optionally substituted 2-(2-hydroxyphenyl)-2H-benzotriazole group,
- n is an integer from 3 to 20, and
- A is an n-valent organic radical.
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A method of stabilizing a plastic, comprising combining the plastic with a photoprotective agent or stabilizer, comprising a benzotriazole of formula (I)
- wherein B is an optionally substituted 2-(2-hydroxyphenyl)-2H-benzotriazole group,
- n is an integer from 3 to 20, and
- A is an n-valent organic radical.
A method of stabilizing a plastic against an effect of light, comprising combining the plastic with the benzotriazole of formula (I)
- wherein B is an optionally substituted 2-(2-hydroxyphenyl)-2H-benzotriazole group,
- n is an integer from 3 to 20, and
- A is an n-valent organic radical.
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Dependencies are inferred from the claim text.