Ink composition for offset printing
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United States of America Patent
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Issued Date -
Apr 29, 2004
app pub date -
Mar 6, 2003
filing date -
Sep 8, 2000
priority date (Note) -
Abandoned
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Abstract
An offset printing ink composition is provided which has further improved drying characteristics to satisfy performances required for offset printing, such as anti-blocking properties including primary blocking resistance and secondary blocking resistance, while aiming at compatibility with the environment. The ink composition comprises mainly a coloring agent, a binder resin and a solvent containing a vegetable oil component and is characterized by further containing as a drying characteristic improver at least one member selected from the group consisting of (A) a polymer which is obtained by polymerizing at least one of olefin monomers and diene monomers, and has a solubility parameter of less than 19 (MPa).sup.1/2 and is compatible with the solvent; and (B) a liquid paraffin, wherein the total amount of the improver is 0.1 to 10% by weight in the ink composition.
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