EP 2220178 A2 20100825 - AMPHOTERIC DISPERSANTS AND THEIR USE IN INKJET INKS
Title (en)
AMPHOTERIC DISPERSANTS AND THEIR USE IN INKJET INKS
Title (de)
AMPHOTERE DISPERGIERMITTEL UND IHRE VERWENDUNG ALS ZUSATZ ZU FARBSTRAHLTINTEN
Title (fr)
DISPERSANTS AMPHOTÈRES ET LEUR UTILISATION DANS DES ENCRES POUR JET D'ENCRE
Publication
Application
Priority
- US 2008086494 W 20081212
- US 740907 P 20071212
Abstract (en)
[origin: WO2009076567A2] The present disclosure provides a black ink-jet ink, having a pH greater than 7, comprising a first aqueous vehicle, a carbon black pigment, and an amphoteric polymeric dispersant, wherein the amphoteric polymeric dispersant is a block copolymer comprising an A block and a B block, wherein the A block is a segment consisting essentially of an amine monomer; and the B block is a segment comprising an acidic monomer and at least one hydrophobic monomer; wherein the dispersant is neutralized, and with the proviso that the acid number is greater that the amine number, and the B block does not contain an amine monomer. The disclosure further pertains to an ink set comprising this black ink and at least a second ink which contains a reactive species with appropriate cationic agent, salt, or pH capable of destabilizing the carbon black dispersion. Still further, the disclosure pertains to a method of printing wherein the black ink and second ink are printed in an adjacent relationship, thereby minimizing penetration, feathering and/or bleed of the black pigment and improving print quality.
IPC 8 full level
C09D 11/00 (2006.01); C09K 23/52 (2022.01)
CPC (source: EP)
C09D 11/324 (2013.01); C09D 11/328 (2013.01); C09D 11/40 (2013.01)
Citation (search report)
See references of WO 2009076567A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2009076567 A2 20090618; WO 2009076567 A3 20090806; EP 2220178 A2 20100825; JP 2011508797 A 20110317; JP 5677849 B2 20150225
DOCDB simple family (application)
US 2008086494 W 20081212; EP 08859425 A 20081212; JP 2010538172 A 20081212