Claims
- 1. A clear, substantially colorless thermoplastic article comprising at least one ultraviolet absorber compound exhibiting an extraction level from said thermoplastic article measured as the level of absorbance exhibited by a heated alcohol extract solution after 2 hours exposure of at most 0.1 absorbance units; and wherein said article provides protection from ultraviolet exposure such that upon introduction of a 50 mg/L aqueous solution of Vitamin B2 exhibiting an initial UV-Vis absorbance at a wavelength of 444 nm, wherein said Vitamin B2 exhibits at least 35% retention of initial absorbance at 444 nm wavelength after 14 hours of sealed exposure under the UV Weathering Test.
- 2. The clear thermoplastic article of claim 1 wherein said ultraviolet absorber compound exhibits an extraction level of at most 0.05 absorbance units when subjected to a heated extraction test for 2 hours.
- 3. The clear thermoplastic article of claim 2 wherein said ultraviolet absorber compound exhibits an extraction level of at most 0.025 absorbance units when subjected to a heated extraction test for 2 hours.
- 4. The clear thermoplastic article of claim 3 wherein said ultraviolet absorber compound exhibits an extraction level of 0.0 absorbance units when subjected to a heated extraction test for 2 hours.
- 5. A clear, substantially colorless thermoplastic article comprising at least one ultraviolet absorber compound exhibiting an extraction level from said thermoplastic article measured as the level of absorbance exhibited by a heated alcohol extract solution after 2 hours exposure of at most 0.1 absorbance units; and wherein said article provides protection from ultraviolet exposure such that upon introduction of a 2 mg/L ethanol solution of Vitamin A exhibiting an initial UV-Vis absorbance at a wavelength of 325 nm, wherein said Vitamin A exhibits at least 20% retention of initial absorbance at 325 nm wavelength after 14 hours of sealed exposure under the UV Refrigeration Test.
- 6. The clear thermoplastic article of claim 5 wherein said ultraviolet absorber compound exhibits an extraction level of at most 0.05 absorbance units when subjected to a heated extraction test for 2 hours.
- 7. The clear thermoplastic article of claim 6 wherein said ultraviolet absorber compound exhibits an extraction level of at most 0.025 absorbance units when subjected to a heated extraction test for 2 hours.
- 8. The clear thermoplastic article of claim 7 wherein said ultraviolet absorber compound exhibits an extraction level of 0.0 absorbance units when subjected to a heated extraction test for 2 hours.
- 9. A clear, substantially colorless thermoplastic article comprising at least one ultraviolet absorber compound exhibiting an extraction level from said thermoplastic article measured as the level of absorbance exhibited by a heated alcohol extract solution after 2 hours exposure of at most 0.1 absorbance units; and wherein said article provides protection from ultraviolet exposure such that upon introduction of a 5 mg/L aqueous solution of Vitamin B6 exhibiting an initial UV-Vis absorbance at a wavelength of 325 nm, wherein said Vitamin B6 exhibits at least 60% retention of initial absorbance at 325 nm wavelength after 14 hours of sealed exposure under the UV Refrigeration Test.
- 10. The clear thermoplastic article of claim 9 wherein said ultraviolet absorber compound exhibits an extraction level of at most 0.05 absorbance units when subjected to a heated extraction test for 2 hours.
- 11. The clear thermoplastic article of claim 10 wherein said ultraviolet absorber compound exhibits an extraction level of at most 0.025 absorbance units when subjected to a heated extraction test for 2 hours.
- 12. The clear thermoplastic article of claim 11 wherein said ultraviolet absorber compound exhibits an extraction level of 0.0 absorbance units when subjected to a heated extraction test for 2 hours.
- 13. A clear, substantially colorless thermoplastic article comprising at least one ultraviolet absorber compound exhibiting an extraction level from said thermoplastic article measured as the level of absorbance exhibited by a heated alcohol extract solution after 2 hours exposure of at most 0.1 absorbance units; and wherein said article provides protection from ultraviolet exposure such that upon introduction of a 1.1 mg/L aqueous citric acid (pH 3.5) solution of FD&C Blue #1 (with 1 mg/L of FeCl3 added) exhibiting an initial UV-Vis absorbance at a wavelength of 625 nm in the blue spectrum, wherein said FD&C Blue #1 exhibits at least 5% retention of initial absorbance at 444 nm wavelength after 14 hours of sealed exposure under the UV Refrigeration Test.
- 14. The clear thermoplastic article of claim 13 wherein said ultraviolet absorber compound exhibits an extraction level of at most 0.05 absorbance units when subjected to a heated extraction test for 2 hours.
- 15. The clear thermoplastic article of claim 14 wherein said ultraviolet absorber compound exhibits an extraction level of at most 0.025 absorbance units when subjected to a heated extraction test for 2 hours.
- 16. The clear thermoplastic article of claim 15 wherein said ultraviolet absorber compound exhibits an extraction level of 0.0 absorbance units when subjected to a heated extraction test for 2 hours.
- 17. A clear, substantially colorless thermoplastic article comprising at least one ultraviolet absorber compound exhibiting an extraction level from said thermoplastic article measured as the level of absorbance exhibited by a heated alcohol extract solution after 2 hours exposure of at most 0.1 absorbance units; and wherein said article provides protection from ultraviolet exposure such that upon introduction of a 1 mg/L aqueous citric acid solution (pH 3.5) of Folic Acid (with 1 mg/L of FeCl3 added) exhibiting an initial peak area measurement via HPLC analysis, wherein said FD&C Blue #1 exhibits at least 30% retention of initial peak area measurement after 14 hours of sealed exposure under the UV Refrigeration Test.
- 18. The clear thermoplastic article of claim 17 wherein said ultraviolet absorber compound exhibits an extraction level of at most 0.05 absorbance units when subjected to a heated extraction test for 2 hours.
- 19. The thermoplastic article of claim 18 wherein said ultraviolet absorber compound exhibits an extraction level of at most 0.025 absorbance units when subjected to a heated extraction test for 2 hours.
- 20. The clear thermoplastic article of claim 19 wherein said ultraviolet absorber compound exhibits an extraction level of 0.0 absorbance units when subjected to a heated extraction test for 2 hours.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation-in-part of co-pending application Ser. No. 09/934,377, filed on Aug. 21, 2001. This parent application is herein entirely incorporated by reference.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09934377 |
Aug 2001 |
US |
Child |
10278664 |
Oct 2002 |
US |