| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a fog even at high temperature and high humidity without stain at the time of color developing when a recording material is used, by using vegetable oil exhibiting biodegradability with small generation of odor as solvent for dissolving an electron donative colorant for color developing by contact with an electron acceptive developer. SOLUTION: This microcapsule contains electron donative colorant dissolved in solvent made of vegetable oil. And, a capsule wall of the microcapsule is formed of polyurethaneurea resin obtained by polymerizing polyisocyanate and compound having two or more active hydrogens in a molecule. In this case, the polyisocyanate is aliphatic polyisocyanate having properties of dissolving in 5 wt.% or more of repessed oil in the oil at 60 deg.C. |
