Emulsion coloring materials for ink jet printers and methods of producing the same
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United States of America Patent
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Jul 8, 2014
Grant Date -
Jan 28, 2010
app pub date -
Apr 2, 2009
filing date -
Jul 24, 2008
priority date (Note) -
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Abstract
There is provided an emulsion coloring material which can be used on ordinary paper, has good color developability, and can be used for conventional erasable pens or printing inks of black or blue color, having sufficiently high densities. When use is made of an erasable emulsion coloring material capable of controlling color development and decolorization by the presence or absence of the interaction between a chromatic material and a color developer, the colored emulsion comprising a copolymer resin of at least one unit selected from styrene and styrene derivatives and at least one unit selected from an acrylic acid ester and a methacrylic acid ester having a substituent which comprises a carbon chain having 4 or more carbon atoms, coloring ability can be enhanced.
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