EP 0391170 B1 19931110 - Process for dyeing paper.
Title (en)
Process for dyeing paper.
Title (de)
Verfahren zum Färben von Papier.
Title (fr)
Procédé pour teindre le papier.
Publication
Application
Priority
DE 3910923 A 19890405
Abstract (en)
[origin: JPH02289198A] PURPOSE: To color paper in blue color, etc., having excellent light resistance, moisture resistance (blotting resistance) and fastness to acid, alkali and alum by using a specific dye. CONSTITUTION: Paper is colored with a dye expressed by formula I [X is H, OH, a 1-4C alkoxy or NHR3 ; R1 is H or a 1-4C alkyl; R2 and R3 are each H, an alkyl (carbonyl), an alkylsulfonyl, an aryl (carbonyl), an arylsulfonyl, an aralkyl (carbonyl) or aminocarbonyl] (e.g. the compound of formula II).
IPC 1-7
IPC 8 full level
C09B 31/08 (2006.01); D21H 21/28 (2006.01)
CPC (source: EP US)
D21H 21/28 (2013.01 - EP US); Y10S 8/919 (2013.01 - US)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 0391170 A1 19901010; EP 0391170 B1 19931110; DD 299326 A5 19920409; DE 3910923 A1 19901011; DE 59003396 D1 19931216; JP H02289198 A 19901129; US 5034017 A 19910723
DOCDB simple family (application)
EP 90105512 A 19900323; DD 33943290 A 19900404; DE 3910923 A 19890405; DE 59003396 T 19900323; JP 7908190 A 19900329; US 49737190 A 19900321