INKJET INK AND IMAGE FORMING METHOD
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United States of America Patent
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May 13, 2021
app pub date -
Nov 11, 2020
filing date -
Nov 13, 2019
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The composite particles contained in an inkjet ink are particles of a composite of a polyester resin having a sulfur atom-containing polar group and a dye. The polyester resin is non-crystalline. The polyester resin has a first repeating unit derived from a polyvalent carboxylic acid having the sulfur atom-containing polar group, a second repeating unit derived from a polyvalent carboxylic acid having no sulfur atom-containing polar group, and a third repeating unit derived from a polyhydric alcohol. The content percentage of the first repeating unit relative to a total amount of the first repeating unit and the second repeating unit is 1 to 10 mol %. The content percentage of the polyester resin relative to the composite particles is 50% by mass or more and less than 100% by mass.
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