EP 1756231 A1 20070228 - METHOD FOR PRODUCING LIQUID ADJUSTMENTS OF BASIC AZO DYES
Title (en)
METHOD FOR PRODUCING LIQUID ADJUSTMENTS OF BASIC AZO DYES
Title (de)
VERFAHREN ZUR HERSTELLUNG VON FLÜSSIGEINSTELLUNGEN BASISCHER AZOFARBSTOFFE
Title (fr)
PROCEDE POUR PRODUIRE DES AJUSTAGES DE LIQUIDES DE COLORANTS AZO BASIQUES
Publication
Application
Priority
- EP 2005005393 W 20050518
- DE 102004025444 A 20040519
Abstract (en)
[origin: WO2005113682A1] The invention relates to a method for producing liquid adjustments of basic azo dyes from a phenylenediamine I, which can be substituted by alkyl or alkoxy, by diazotization and coupling in an acidic solution. According to said method, the phenylenediamine is diazotized with sodium nitrite in the presence of at least two organic acids comprising at least one first acid (A) with a pkA value of = 4.0 and at least one second acid (B) with a pKA value = 4.1 and a nanofiltration is carried out once the coupling has been completed.
IPC 8 full level
C09B 37/00 (2006.01); C09B 29/08 (2006.01); C09B 35/38 (2006.01); C09B 35/42 (2006.01); C09B 35/52 (2006.01); C09B 41/00 (2006.01); C09B 67/26 (2006.01); C09B 67/34 (2006.01); C09B 67/44 (2006.01); C09B 67/54 (2006.01)
CPC (source: EP US)
C09B 37/00 (2013.01 - EP US); C09B 67/0076 (2013.01 - EP US); C09B 67/0083 (2013.01 - EP US); C09B 67/0096 (2013.01 - EP US)
Citation (search report)
See references of WO 2005113682A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005113682 A1 20051201; CN 1957044 A 20070502; DE 102004025444 A1 20051215; EP 1756231 A1 20070228; MX PA06013154 A 20070214; US 2007213514 A1 20070913
DOCDB simple family (application)
EP 2005005393 W 20050518; CN 200580016186 A 20050518; DE 102004025444 A 20040519; EP 05746248 A 20050518; MX PA06013154 A 20050518; US 56899605 A 20050518