Water-based ink composition for ball-point pen
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United States of America Patent
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Mar 18, 2008
Grant Date -
Jun 30, 2005
app pub date -
Nov 7, 2002
filing date -
Nov 19, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A water-based ink composition for a ballpoint pen containing at least colored resin particles which have an average particle diameter of 2 to 20 .mu.m and which are non-thermoplastic in a proportion of 5 to 30% by weight based on the total amount of the ink composition and non-colored particles having a glass transition point of 60.degree. C. or higher. The average particle diameter of the non-colored particles is preferably to 0.01 to 10 .mu.m. The ink composition preferably includes at least one selected from ethylene oxide or propylene oxide adducts of glycerin and ethylene oxide or propylene oxide adducts of diglycerin in a proportion of 1 to 30% by weight based on the total amount of the ink composition.
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