WASHABLE INK COMPOSITIONS AND WRITING INSTRUMENTS COMPRISING SAME
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United States of America Patent
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Issued Date -
Mar 11, 2010
app pub date -
Sep 11, 2008
filing date -
Sep 11, 2008
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Abstract
The disclosure is generally related to a washable ink composition and a writing instrument containing the same. The disclosure provides a washable ink composition that includes a pigment capsule having a polymer matrix formed of a resin selected from the group consisting of aminoplast resins, epoxy resins, and combinations thereof, and at least one colorant contained in the polymer matrix; and at least one washing aid having at least 4 ethylene oxide units per molecule of washing aid and/or at least one washing aid having an HLB value of at least 12.
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