| abstract |
PROBLEM TO BE SOLVED: To release almost all of a functional substance contained in a microgel at a constant volatilization rate over a long period of time, and to easily spray or spray, and to have a function such as adhesion performance. And water-dispersible sustained-release preparations capable of imparting the same. SOLUTION: Using a functional substance, a (meth) acrylate monomer, a polyfunctional (meth) acrylate monomer, and, if necessary, a hydrophilic monomer, a surfactant, a polymerization initiator and water. Emulsion copolymerization is carried out to produce a water-dispersed sustained-release preparation containing a functional substance in a microgel. |