Patent · US Active

Aqueous cyan inkjet ink composition containing a mixture of a self-dispersed pigment and a specific cosolvent mixture

US8372898B1 · kind B1 · utility

0Cited by
8References
12Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 29, 2012
Grant dateFeb 12, 2013
Priority date
Expiry dateMar 29, 2032

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC09D11/38
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

The invention relates to an aqueous cyan inkjet ink composition for use in ink jet printers comprising an aqueous carrier, a self dispersed cyan pigment, a polymeric additive, a surfactant, and a specific cosolvent mixture comprising a C2-C8 terminal alkanediol, a cyclic amide compound and its derivative, a polyol/polyalkylene oxide condensate, and a trihydric alcohol. Preferably, the self dispersed cyan pigment is surface modified with bisphosphonate group. The cyan inkjet ink demonstrates excellent stability, superior chroma, good printhead maintenance characteristics and high heater reliability in permanent and semi permanent printheads.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.