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Grey Colouring Photochromic Fused Pyrans

Clarke, David A., Heron, B. Mark, Gabbutt, Christopher D., Hepworth, John D., Partington, Steven M. and Corns, Stephen N. (2000) Grey Colouring Photochromic Fused Pyrans. WO/2000/018755.

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A photochromic grey colouring 2$i(H)-naphtho[1,2-$i(b)]pyran of formula (I) wherein R?1¿ is selected from mono-, di- or poly-substituted aryl groups, mono-, di- or poly-substituted naphthyl groups and mono-, di- or poly-substituted heteroaryl groups, wherein at least one substituent is a nitrogen containing group, including amino, C¿1?-C¿20? and C¿6?-C¿20? alkylamino, C¿1?-C¿20? and C¿6?-C¿20? dialkylamino, C¿2?-C¿20? dialkenylamino, C¿2?-C¿20? or C¿4?-C¿20? di(polyalkenyl)amino, arylamino, diarylamino, C¿1?-C¿20? alkylarylamino, tetra (C¿1?-C¿10? linear or branched alkyl) guanidino and cyclic-amino groups and at least one of R?7¿ and R?9¿, which may be the same or different, is selected from C¿1?-C¿20? $i(N) alkylamino C¿1?-C¿20? $i(N)-alkylamido, C¿1?-C¿20? $i(N,N)-dialkylamido, amido, nitro, amino, C¿1?-C¿20? alkylamino, C¿1?-C¿20? dialkylamino, C¿2?-C¿20? dialkenylamino, C¿4?-C¿20? di(polyalkenyl)amino, arylamino, diarylamino, C¿1?-C¿20? alkylarylamino, or cyclicamino groups. The compounds may be combined with a polymeric host material such as plastic or glass to make a sunglass lens, an ophthalmic lens or a window. The compounds may also be included in an ink or a fuel.

Item Type: Patent
Subjects: Q Science > QD Chemistry
Schools: School of Applied Sciences
Related URLs:
Depositing User: Graham Stone
Date Deposited: 19 Oct 2012 13:49
Last Modified: 28 Aug 2021 11:23


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