Microemulsion printing ink
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United States of America Patent
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May 23, 1995
Grant Date -
N/A
app pub date -
Mar 29, 1994
filing date -
Mar 29, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
A printing ink useful for 'waterless' printing processes comprising a water-in-oil microemulsion wherein the water phase is present in an amount of about 5 to 20 wt. %, based on the weight of the ink. The water phase contains about 0.5 to 3 wt. %, based on the weight of the ink, of a surfactant which will not lower the surface tension (as measured at ambient temperature) of the ink, but will preferably increase the surface tension of the ink by at least about 5%. The ink optionally contains about 0.05 to 0.5 wt. %, based on the weight of the ink, of a water-soluble polymer capable of producing a viscosity in the water phase of about 5 to 10 poise as measured at ambient temperature.
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