| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an oily ink composition for writing instruments, which has performance of being written down immediately even after it is left standing for a long time in a state where a pen tip is exposed to atmosphere and which provides good writing free from oozing in the face not permeated with ink. <P>SOLUTION: The oily ink composition for writing instruments contains a colorant, an organic solvent such as a 1-4C alcohol or propylene glycol monomethyl ether, a resin, and a silicone-based compound. The silicone-based compound is one or more kinds selected from decamethyl-cyclodecane pentasiloxane, 1,1,1,3,5,5,5-heptamethyl-3-(trimethylsiloxy)pentane trisiloxane, and a dimethylpolysiloxane having viscosity of 5-20 mPa s. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
