摘要 |
PURPOSE:To give an optionally designable particle size to a microcapsule by encompassing a base body 1 comprising a highly water absorptive polymer impregnated with an aq. liquid with a polymer wall film 2 formed by polymerizing the base body with a water-insoluble compd. CONSTITUTION:A polymer base body 1 comprising a highly water-absorptive resin such as 'Aquakeep 4S (R)', etc., is impregnated with water or an aq. liquid prepd. by dissolving, decomposing, suspending, or emulsifying a water-soluble compd. such as water-soluble polyamine, etc., or several effective components in an aq. medium. Then, polymer wall film 2 which encompasses the base body 1 comprising a polymer impregnated with the aq. liquid is formed by dispersing the base body 1 in a water-insoluble solvent such as toluene contg. a water- insoluble compd. such as water-insoluble isocyanate polymerizable with the base body 1, and polymerizing the both compds. Obtd. reinforced microcapsules are used after the reaction, and after separating by filtration, etc. Thus, reinforced microcapsules are obtd. without causing destruction easily, and the particle size can be designed optionally. |