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US 2016/0257604 A1Published application
Ultraviolet absorbing glass and articles thereof
AssigneeCorning Incorporated
InventorYves Andre Henri Brocheton
Life of this patent
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Abstract
Disclosed herein are ultraviolet absorbing glasses. The glasses can be strengthened by a chemical tempering process and maintain good mechanical and optical properties while having a reduced thickness compared to conventional glasses. The ultraviolet absorbing glasses can include coloring agents and can be formed into ophthalmic lenses. Methods of making and using the ultraviolet absorbing glasses are also described.
Claims17
An ultraviolet absorbing glass comprising (a) a base glass composition comprising in weight percent:
- SiO2
- 50-60
- B2O3
- 17.5-22.0
- Al2O3
- 6.5-8.0
- Li2O
- 3.5-5.5
- Na2O
- 0.5-7.5
- K2O
- 0.5-7.5
- ZrO2
- 2.0-7.0
- TiO2
- 0-2.0
- and (b) an ultraviolet component comprising (i) copper oxide and (ii) a chloride source, a bromide source, or a combination thereof, wherein the amount of copper oxide is from 0.25 to 1.5 parts by weight per 100 parts by weight base composition;
- and the sum of the chloride derived from the chloride source, the bromide derived from the bromide source, or a combination thereof is from 0.2 to 4.0 parts by weight per 100 parts by weight base composition.
15 more elements
Dependencies are inferred from the claim text.