Photographic recording material

US5719011A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventor

• Erich Wolff · Solingen, DE

Key dates

• Filing date: Oct 9, 1996
• Grant date: Feb 17, 1998
• Expiry date: Oct 9, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/16
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Compounds of the formula I are suitable as release compounds for photographically useful groups (photographic units). On reacting with nucleophilic reagents, preferably with dinucleophiles, the photographically useful group is released. ##STR1## In formula I: PUG means a photographically useful group; PA1 A means a strong electron acceptor; PA1 V means a vinylene group or two or more successive vinylene groups, wherein the vinylene group or two successive vinylene groups may form part of an aromatic ring system; PA1 L means one or more timing groups; PA1 m means 0 (zero) 1 or 2; PA1 n means 0 (zero), 1 or 2; PA1 R.sup.1 means H or methyl; PA1 R.sup.2 means H, alkyl with 1-18 C atoms or aryl; PA1 R.sup.3, R.sup.4 mean H or an organic group, PA1 wherein R.sup.2 and R.sup.3 may also together mean the residue necessary to complete a ring.