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US 2002/0002262 A1Published application
Uv-stabilizers for siloxane systems
AssigneeBayer Aktiengesellschaft
InventorPETER BIER
Life of this patent
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Abstract
A UV-stabilizer comprising a mixture of hydroxybenzotriazole and a hydrolyzable silane containing at least one epoxy group is disclosed. The stabilizer is especially suitable as a component of a siloxane system for coating substrates, especially thermoplastic substrates and most especially polycarbonate substrates.
Claims10
UV-stabiliser mixture containing
- A) hydroxybenzotriazole according to the general formula (1):
- 5
- R1:
- H, C1-C18 alkyl, C5-C6 cycloalkyl, C6-C12 aryl,
- R2:
- H, halogen, preferably Cl, or C1-C12 alkyl,
- R3:
- a single bond, C1-C12 alkylene, C5-C6 cycloalkylene or phenylene,
- R4:
- H, alkali metal, ammonium, alkaline earth metal, C1-C12 alkyl,
- 6
- and
- B) hydrolysable silanes containing epoxy groups.
10 more elements
Dependencies are inferred from the claim text.