| 摘要 |
PURPOSE:To obtain the titled fine capsule which is stable in a wide range by mixing a liquid, obtained by a dispersing a hydrophobic substance into an acidic aq. soln. of a water-soluble resin as discontinuous fine particles, and an amino resin precursor, and allowing the mixture to react in an acidic medium under heating. CONSTITUTION:One or more kind of a water-soluble vinyl monomer is added into an aq. soln. of a plural copolymer of an oil-soluble monomer-maleic anhydride-maleic ester, and polymerized to obtain a new water-soluble resin. A hydrophobic substance is dispersed or emulsified in an acidic aq. soln. of said resin to prepare a liquid contg. discontinuous fine particles. Meanwhile, an amino resin precursor is prepared. Said liquid and the precursor are mixed, and allowed to react in an acidic medium under heating to form a wall membrane. A fine capsule contg. the hydrophobis substance as a core substance is thus obtained. The methylol body of an amino compd. and/or its low mol.wt. polymer, etc. are used as the amino resin precursor. |
