Browse Prior Art Database

Ink Jet Ink

IP.com Disclosure Number: IPCOM000119418D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 1 page(s) / 34K

Publishing Venue

IBM

Related People

Lindquist, RM: AUTHOR [+2]

Abstract

A non-aqueous jet ink which is non-toxic and compatible with drop-on-demand (DOD) hardware, so as to result in minimum hardware maintenance, is formulated using propylene carbonate (CH6CO3 -or- OCOCH2CH(CH3)O).

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Ink Jet Ink

      A non-aqueous jet ink which is non-toxic and compatible with
drop-on-demand (DOD) hardware, so as to result in minimum hardware
maintenance, is formulated using propylene carbonate
           (CH6CO3 -or- OCOCH2CH(CH3)O).

      Propylene carbonate is a good solvent for the various dyes and
polymers which have found use in this class of jet inks, and its low
viscosity allows its combination with rheologents, such as glycols,
polyols and polymers, to yield the higher viscosity needed of DOD
inks.

      Propylene carbonate will dissolve dyes that are water- soluble
or dyes that are water-insoluble.  Thus, selection of the proper dye
yields a DOD ink which is waterfast, if desired.

      Propylene carbonate is also compatible with state-of-the-art
rheologents which are necessary to increase ink/hardware
compatibility, and thus minimize hardware maintenance.

      Use of propylene carbonate allows toxic agents, such as
ethylene glycol, to be eliminated when formulating DOD inks.
      A preferred ink formulation includes:
           Constituent              Function
      A)   propylene carbonate      dye solubilizer
      B)   dye                      coloring agent
      C)   propylene glycol         viscosity control agent where
constituents A and C are used in a ratio of about 1 to 3, and
in total comprise from 95 to 99 wt.% of the ink; and...