| 摘要 |
PURPOSE:To prevent the volatilization of a core substance in a drying process, by forming the wall film material of a microcapsule from a polyvalent isocyanate polymer and a polycondensate of a water soluble cationic urea resin. CONSTITUTION:In preparing a microcapsule capable of having a hydrophobic volatile substance such as benzene, toluene, xylene, hexane or heptane therewithin as a core substance, polyvalent isocyanate such as tolylene diisocyanate, diphenylmethane-diisolcyanate or hexamethylene diisocyanate is contained in the volatle substance in an amount of 0.1-50pts.wt., pref., 0.5-20pts.wt. Polyvalent isocyanate is contained in the core substance in a ratio of 1-10pts.wt., pref., 5-50pts.wt. per 100pts.wt. of the amino resin prepolymer used in microencapsulation. |
