Method for increasing the stability of non-ionic surfactant-cont

Details Method for increasing the stability of non-ionic surfactant-cont Method for increasing the stability of non-ionic surfactant-cont

1995-03-03

1996-03-26

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 20C, 106 22B, 106 23B, C09D 1102

Patent

active

055017258

ABSTRACT:
A method for increasing the cloud point and stability of an ink. An ink is provided which includes a solvent, a coloring agent, and an ethoxylated non-ionic surfactant to increase print quality. To increase the cloud point of the ink (which is affected by the surfactant), the ink is placed in contact with a polymeric foam (e.g. polyurethane foam) which reacts with the surfactant to produce an ink product having a higher cloud point. The treated ink product is then removed from the foam. Treatment may be accomplished by passing the ink through the foam before placing the ink in an ink cartridge. Removal of the treated ink product from the foam may be achieved by compressing the foam. Alternatively, the ink may be placed within an ink cartridge containing the polymeric foam in which the ink will be treated in situ inside the cartridge.

REFERENCES:
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Hewlett-Packard Journal, vol. 39 (No. 4), Aug. 1988.
Product Information Sheet on TERGITOL.RTM. 15-5-5 by Union Carbide (undated).
Product Information Sheets on Polyurethane Foam by Foamex, L.P. (undated).
Product Information Sheet on GENAPOL.RTM. 26-L Surfactants by Hoechst Celanese Corp. (Oct. 1993).
Product Information Sheet on IGEPAL.RTM. CO Surfactants by Rhone-Poulenc (undated).
Product Information Sheet on NEODOL.RTM. Surfactants by Shell Chemical Company (undated).

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