Ink composition for aqueous ink ball point pen and aqueous ink ball point pen
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United States of America Patent
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Oct 22, 2013
Grant Date -
Oct 4, 2012
app pub date -
Dec 2, 2010
filing date -
Dec 8, 2009
priority date (Note) -
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Abstract
An ink composition for an aqueous ink ball point pen with which a sufficiently high line intensity is obtained even when a thermochromic microcapsule pigment having a small average particle diameter is used and which is excellent in storage stability and a writing performance is provided with such a constitution that it contains at least a microcapsule pigment which has an average particle diameter of 0.1 to 1.0 μm and in which a wall film is formed by an amino resin and a chemical substance which is a polymer comprising ketone as a main chain and has an acidic functional group in the chemical structure and which has an acid value of 3 to 40 (mgKOH/g).
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