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US 2010/0149620 A1Published application
Photochromic optical articles prepared with reversible thermochromic materials
AssigneeTransitions Optical, Inc.
InventorsDavid B. Knowles, Stephen D. Straight, Kevin J. Stewart, Forrest R. Blackburn
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Abstract
Provided is a photochromic optical articleincluding: (a) an optical substrate; (b) a thermally reversible photochromic material; and (c) reversible thermochromic material capable of at least partially filtering UV/visible light at or below room temperature and becoming less capable of filtering UV/visible light at temperatures greater than room temperature.
Claims14
A photochromic optical article comprising:
- (a) an optical substrate;
- (b) a thermally reversible photochromic material;
- and
- (c) a reversible thermochromic material capable of at least partially filtering UV/visible light at or below room temperature and becoming less capable of filtering UV/visible light at temperatures greater than room temperature.
1 more element
The photochromic optical article of claim 53, wherein the tautomer comprises a Schiff base of 2-hydroxyacetophenone and/or aliphatic or benzylic amine.
Dependencies are inferred from the claim text.