Polymerizate of (allyl carbonate) and aliphatic polyurethane having acrylic unsaturation
Photoreactive lenses with adamantane spiro compounds
ApplicationNo. 08/990889 filed on 12/15/1997
US Classes:549/389, Naphtho-pyrans (including hydrogenated)252/586, Displaying color change524/109, Two or more chalcogen rings524/110, Six-membered chalcogen ring524/99Six-membered nitrogen ring, e.g., pyridine, etc.
ExaminersPrimary: Stockton, Laura L.
Attorney, Agent or Firm
International ClassesC07D 311/92 (20060101)
C07D 311/00 (20060101)
C09K 9/02 (20060101)
AbstractDescribed are novel photochromic 6-aryl substituted 3H-naphtho[2,1-b]pyran compounds, examples of which are naphthopyran compounds having a substituted aryl group at the number 6 carbon atom and certain substituents at the 3-position of the pyran ring. Certain substituents may also be present at the number 7, 8, 9 or 10 carbon atoms of the compounds. These compounds may be represented by the following graphic formula: ##STR1##Also described are polymeric organic host materials that contain one or more of such compounds or combinations of such compounds) with complementary photochromic compounds, e.g., other naphthopyrans, benzopyrans and spiro(oxazine)type compounds.