| 摘要 |
PURPOSE:To enhance the strength and compactness of a wall film, by emulsifying and dispersing a hydrophobic core substance into an acidic aqueous solution of specific anionic high-molecular electrolyte to form a capsule wherein a wall film of an amino resin is formed around the core substance. CONSTITUTION:A hydrophobic core substance is emulsified and dispersed into an acidic aqueous solution of a water-soluble polymer comprising an anionic ternary copolymer consisting of 9-92mol% of acrylic acids, 3-87mol% of acrylamide and 4-26mol% of acrylonitrile. Next, a film comprising an amino resin is formed around the hydrophobic core substance to obtain a microcapsule. The use amount of the aformentioned ternary copolymer is usually 1-80pts.wt. to 100pts. wt. of the hydrophobic substance. As the aforementioned hydrophobic core substance, animal oils such as fish oil or lard, vegetable oils such as soybean oil or linseed oil and mineral oils such as petroleum or kerosine are designated. |
