Encapsulated matter and production process thereof

A process for producing encapsulated matter comprising a core material having a charge on a surface thereof and a plurality of coating layers each mainly comprising a polymer with which the core material is coated, the layers comprising at least a first coating layer and a second coating layer, which process comprises:

• (1) adding an ionic polymerizable surfactant A and/or an ionic monomer, each having a charge opposite to the surface charge of the core material, to an aqueous dispersion of the core material having the charge on the surface thereof, followed by mixing;
• then,
• (2) adding an ionic polymerizable surfactant B having a charge of the same kind as or opposite to the surface charge of the core material, followed by mixing and emulsification, and adding a polymerization initiator thereto to conduct polymerization in water, thereby forming the first coating layer:
• subsequently,
• (3) adding an ionic polymerizable surfactant C and/or an ionic monomer, each having a charge opposite to the surface charge of the first coating layer to an aqueous dispersion of coated matter having the first coating layer, followed by mixing;
• and thereafter,
• (4) adding an ionic polymerizable surfactant D having a charge of the same kind as or opposite to the surface charge of the first coating layer, followed by mixing and emulsification, and adding a polymerization initiator thereto to conduct polymerization in water, thereby forming the second coating layer.

A process for producing encapsulated matter comprising a core material having a charge on a surface thereof and a plurality of coating layers each mainly comprising a polymer with which the core material is coated, the layers comprising at least a first coating layer and a second coating layer, which process comprises:

• (1) adding an ionic polymerizable surfactant A and/or an ionic monomer, each having a charge opposite to the surface charge of the core material to an aqueous dispersion of the core material having the charge on the surface thereof, followed by mixing;
• then,
• (2) adding an ionic polymerizable surfactant B having a charge of the same kind as or opposite to the surface charge of the core material and an ionic monomer having a charge of the same kind as that of the ionic polymerizable surfactant B, followed by mixing and emulsification, and adding a polymerization initiator thereto to conduct polymerization in water, thereby forming the first coating layer;
• subsequently,
• (3) adding an ionic polymerizable surfactant C and/or an ionic monomer, each having a charge opposite to the surface charge of the first coating layer to an aqueous dispersion of coated matter having the first coating layer, followed by mixing;
• and thereafter,
• (4) adding an ionic polymerizable surfactant D having a charge of the same kind as or opposite to the surface charge of the first coating layer and an ionic monomer having a charge of the same kind as that of the ionic polymerizable surfactant D, followed by mixing and emulsification, and adding a polymerization initiator thereto to conduct polymerization in water, thereby forming the second coating layer.