Photochromic dichroic naphtho-pyrans and optical articles containing them
US8703978B2 · kind B2 · utility
2Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2009 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Mar 1, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2211/1092
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A naphthopyran compound represented by the formulae (I) to (II) wherein: —mi, Hi2, p, q are each an integer comprised from O to 4 or 5 inclusive; —Ri, R2 and R4, represent a group selected from halogen, H, —Ra, aryl, —OH, —ORa, —SH, —SRa, —NH2, —NR8RaI, —NRbRc, —NRal-CORa, —NRaiCO(aryl), —NRai aryl, —N-aryfe, —N(aryl)CO(aryl), —CO—R3, —CO2R3I, —OC(O)—Rd, and —X—(Re)—Y, and linear or branched (Ci-Ci8) perfluoroalkyl group, wherein R3, Rai, Rb, Rc, X, Y, Re, Rd are as defined into the description; —Zi re resent a group selected from: (formules).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.