THIODIGLYCOL IN TIJ INKS
Original Publication Date: 1992-Dec-31
Included in the Prior Art Database: 2004-Apr-06
Xerox Disclosure Journal
The use of certain thiodiglycol compounds in thermal ink jet inks (TIJ) to improve latency, drop volume control and faster ink drying is disclosed.. The evaporation of water from an ink jet nozzle in an ink jet head causes a decrease in the observed latency. The addition of thiodiglycol compounds, for example, 2L-2004-877, molecular weight range 600-800, an ethoxylated thiodiglycol available from Morton International, acts to chemically bind water and therefore prevents evaporation from the ink formulation. Further, thiodiglycol compounds of this type also decrease the drop volume of the ink droplets emanating from the ink jet head. Reduced drop volume size is a useful property for improving the resolution of thermal ink jet ink images on plain paper. Thiodiglycol compounds may be used as a replacement or supplement for normal glycol concentrations in thermal ink jet ink formulations. Thiodiglycol alkoxylated derivative compounds are also useful in combination with polyethylene oxide materials, the former reduces drop volume while the latter typically increases drop volume. Thiodiglycol compounds have a useful concentration range of from about 0.5 to about 20 weight percent in the ink formulation. The useful molecular weight range for thiodiglycol alkoxylated derivative materials in TIJ inks is about 500 to 2500.