Claims
- 1. An ultraviolet absorbing, protective device comprising a matrix member having an azo dye therein, wherein said azo dye is formed by the reaction of an aromatic coupling agent with a diazonium salt selected from the group consisting of:
- 2. The ultraviolet absorbing, protective device of claim 1, wherein said aromatic compound is selected from the group consisting of:
- 3. The ultraviolet absorbing, protective device of claim 1, wherein said matrix member comprises a layer of polymeric material, and wherein said azo dye is dissolved therein.
- 4. The ultraviolet absorbing, protective device of claim 3, wherein said layer of polymeric material comprises a cellulose acetate polymer.
- 5. The ultraviolet absorbing, protective device of claim 1, wherein the amount of azo dye in said matrix is in the range of 10-100 mg of dye per cm2 of said device.
- 6. An ultraviolet absorbing, protective device comprising a matrix member having an ultraviolet absorbing dye therein, said device characterized in that it will absorb at least 90% of radiation incident thereupon having a wavelength in the range of 250 to 380 nm, and that it will transmit at least 80% of radiation incident thereupon having a wavelength in the range of 500 to 700 nm.
- 7. The device of claim 6, further characterized in that it will transmit at least 90% of radiation incident thereupon having said wavelength in the range of 500 to 700 nm.
RELATED APPLICATION
[0001] This patent application claims priority of provisional patent application Ser. No. 60/174,869 filed Jan. 7, 2000, entitled “Ultraviolet Absorbing Products.”
Provisional Applications (1)
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Number |
Date |
Country |
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60174869 |
Jan 2000 |
US |