Microcapsule-containing composition, thermal recording material using the same and process of preparing microcapsule-containing composition

摘要

Provided are a microcapsule-containing composition comprising microcapsules, each having a microcapsule wall comprising, as a constituent, at least one selected from polyurethane and polyurea produced by polymerizing a compound having active hydrogen and an isocyanate compound, and a compound of a transition element from Group IV in the long-form Periodic Table; and a thermal recording material wherein this composition is used to suppress changes in thermal recording sensitivity with the passage of time and exhibit excellent color reproduction.