Dichroic-photochromic 2H-naphtho[1,2-b]pyran compounds and devices
US9102652B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2014 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Mar 17, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A naphthopyran compound represented by the formulaB1 and B2 are selected independently from the group consisting of a phenyl, naphthyl, or heterocyclic aromatic group, or may combine to form one or more aromatic rings. B1 and B2 may further include one or more substituents. R3, R4, R5, R6, and R10 are selected independently from the group consisting of hydrogen, halogen, —Ra, —OH, —ORa, —O—CO—Ra, —CN, —NO2, —SO2Ra, —SORa, —SH, —SRa, —NH2, —NHRa, —NRaRa, or —NRbRc; or wherein R5 and R6 combine to form a cyclic group. Ra may include an alkyl, polycycloalkyl, alkenyl, polyalkenyl, haloalkyl, perhaloalkyl, alkynyl, polyalkynyl, hydroxyalkynyl, polyhydroxyalkynyl; or (C3-20)cycloalkyl group. Rb and Rc may include hydrogen or alkyl groups, or may combine to form a saturated heterocyclic group, or together with an adjacent phenyl group may form a julolidinyl group. R7 is a mesogenic group. And the naphthopyran, which may be referred to as a dichroic-photochromic compound, may be incorporated into an optical article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.