NAPHTHOPYRANS, COMPOSITIONS AND ARTICLES CONTAINING THEM
申请人:CORNING INCORPORATED
公开号:EP0920645A1
公开(公告)日:1999-06-09
EP0920645A4
申请人:——
公开号:EP0920645A4
公开(公告)日:1999-08-25
US6096246A
申请人:——
公开号:US6096246A
公开(公告)日:2000-08-01
[EN] NAPHTHOPYRANS, COMPOSITIONS AND ARTICLES CONTAINING THEM<br/>[FR] NAPHTOPYRANS, COMPOSITIONS ET ARTICLES LES CONTENANT
申请人:CORNING INCORPORATED
公开号:WO1998004937A1
公开(公告)日:1998-02-05
(EN) The invention relates to photochromic compounds of general formula (I), in which: R1-R8 represent various substituents, characterized in that at least two of the groups R3-R6 are C1-C6 alkoxy groups.(FR) L'invention concerne des composés photochromes de formule générale (I) dans laquelle R1-R8 représentent divers substituants, se caractérisant en ce qu'au moins deux des groupes R3-R6 sont des groupes alcoxy C1-C6.