EP 0316980 B1 19930623 - PHOTOCHROMATIC COMPOSITION AND PHOTOCHROMATIC ARTICLES WHICH CONTAIN IT
Title (en)
PHOTOCHROMATIC COMPOSITION AND PHOTOCHROMATIC ARTICLES WHICH CONTAIN IT
Publication
Application
Priority
IT 2252887 A 19871105
Abstract (en)
[origin: EP0316980A1] A photochromatic composition contains at least two photochromatic compounds, defined by the general formula: <CHEM> wherein the various substituents from R1 to R7 and X are as defined in the specification. In such a mixture, at least one photochromatic compound is defined by the general formula, wherein R7 represents a hydrogen atom, and at least one further compound is also defined by the general formula, wherein R7 represents an -NR8 R9, with R8 and R9 having the meaning as defined in the text.
IPC 1-7
IPC 8 full level
C07D 498/20 (2006.01); C07D 498/10 (2006.01); C07D 521/00 (2006.01); C09K 9/02 (2006.01); G03C 1/685 (2006.01); G03C 1/72 (2006.01)
CPC (source: EP)
G03C 1/685 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0316980 A1 19890524; EP 0316980 B1 19930623; AT E91033 T1 19930715; AU 2474488 A 19890511; AU 605929 B2 19910124; DE 3882015 D1 19930729; DE 3882015 T2 19931104; ES 2056906 T3 19941016; IT 1223067 B 19900912; IT 8722528 A0 19871105; JP H01163184 A 19890627
DOCDB simple family (application)
EP 88202408 A 19881028; AT 88202408 T 19881028; AU 2474488 A 19881104; DE 3882015 T 19881028; ES 88202408 T 19881028; IT 2252887 A 19871105; JP 27761188 A 19881104