EP 0316980 A1 19890524 - Photochromatic composition and photochromatic articles which contain it.
Title (en)
Photochromatic composition and photochromatic articles which contain it.
Title (de)
Photochromische Zusammensetzung und diese Zusammensetzung enthaltende Gegenstände.
Title (fr)
Composition photochrome et articles à base de cette composition.
Publication
Application
Priority
IT 2252887 A 19871105
Abstract (en)
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 521/00 (2006.01); C07D 498/10 (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)
Citation (search report)
- [XPD] EP 0245020 B1 19911002
- [Y] EP 0195898 A1 19861001 - AMERICAN OPTICAL CORP [US]
- [YD] US 4342668 A 19820803 - HOVEY RICHARD J, et al
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