Polycarbonate composition containing UV absorber
The present invention relates to a composition containing polycarbonate and from 0.05 wt. % to 0.5 wt. % of a UV absorber and from 0.0001 wt. % to 0.03 wt. % 2-[2-hydroxy-4-(2-ethylhexyl)oxy]phenyl-4,6-di(4-phenyl)phenyl-1,3,5-triazine.
1. Composition containing polycarbonate and from 0.05 wt. % to 0.5 wt. % of a UV absorber and from 0.0001 wt. % to 0.03 wt. % 2-[2-hydroxy-4-(2-ethylhexyl)oxy]phenyl-4,6-di(4-phenyl)phenyl-1,3,5-triazine, wherein the UV absorber has the formula (4):
wherein R1 and X are the same or different and can be H or alkyl or alkylaryl or
the formula (6):
wherein R 12 represents aryl or alkyl.
2. Composition according to claim 1 , wherein R1 represents 1-methylpropyl and X represents tert.-butyl.
3. Composition according to claim 1 , wherein R1 represents H and X represents octyl.
4. Composition according to claim 1 , wherein R1 and X represent 1-methyl-1-phenyl-ethyl.
5. Composition according to claim 1 , wherein the UV absorber is 2-(5 chloro-2H-benzotriazol-2-yl)-6-((1,1-dimethylethyl)-4-methyl)-phenol.
6. Composition according to claim 1 , wherein the UV absorber is 2,2′-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)-phenol] (CAS No. 103597-45-1).
7. Composition according to claim 1 , wherein R 12 represents ethyl.
8. Composition according to claim 1 , wherein R 12 represents 2-ethylhexyl.
9. Composition according to claim 1 , wherein the UV absorber is 1,3-bis-[(2′-cyano-3′,3′-diphenylacryloyl)oxy]-2,2-bis-{[(2′-cyano-3′,3′-diphenylacryloyl)oxy]methyl}-propane (CAS No. 178671-58-4).
10. Composition according to claim 1 , containing from 0.05 wt. % to 0.4 wt. % UV absorber.
11. Composition according to claim 1 , containing from 0.0001 wt. % to 0.01 wt. % 2-[2-hydroxy-4-(2-ethylhexyl)oxy]phenyl-4,6-di(4-phenyl)phenyl-1,3,5-triazine (CAS No. 204583-39-1).
12. Process for the preparation of a composition according to claim 1 , wherein polycarbonate and from 0.05 wt. % to 0.5 wt. % of a UV absorber and from 0.0001 wt. % to 0.03 wt. % of the compound 2-[2-hydroxy-4-(2-ethylhexyl)oxy]phenyl-4,6-di(4-phenyl)phenyl-1,3,5-triazine (CAS No. 204583-39-1) are combined and mixed.
13. Sheet containing the composition according to claim 1 .
14. Sheet according to claim 13 , wherein the sheet is a solid or multi-wall sheet.
15. Sheet according to claim 13 , wherein the sheet is a multi-layer sheet which has a base layer, the base layer containing the composition.
16. Process for the production of a sheet according to claim 13 , comprising the steps of extruding or coextruding said composition.
17. Composition according to claim 1 , characterised in that the UV absorber and 2-[2-hydroxy-4-(2-ethylhexyl)oxy]phenyl-4,6-di(4-phenyl)phenyl-1,3,5-triazine (CAS No. 204583-39-1) are present in a weight ratio of from 5000:1 to 30:1.
18. Composition according to claim 1 , wherein the UV absorber has the formula (4):
wherein R1 and X are the same or different and can be H or alkyl or alkylaryl.