| 摘要 |
<p>: Pressure-resistant microcapsules with a polyamide shell and a polyurethane-polyurea structured inner mass, a process for their manufacture, and their use Pressure-resistant microcapsules with a shell comprising polyamide and polyurethane-polyurea structured inner mass which contains a water-immiscible liquid phase and, if desired, active compounds, preferably pesticidal active compounds. Furthermore, a process for the manufacture thereof in an aqueous dispersion by dispersing a liquid water-immiscible phase which contains, in an organic solvent, the difunctional or polyfunctional acid derivative required for polyamide formation, a diisocyanate or polyisocyanate or mixture thereof with organic compounds containing hydroxyl groups, or adiisocyanate prepolymer or polyisocyanate prepolymer, and an inert organic aprotic hydrophilizing agent which can dissolve water, as well as the active compounds optionally to be encapsulated, in an aqueous solution of a protective colloid, which contains, if appropriate, surface-active agents, and simultaneously or subsequently admixing aqueous solutions of a diamine or polyamine and acidbinding agents, and reacting the components in the dispersion and, if desired, isolating the microcapsules, preferably by spray-drying, and the use of the microcapsules, preferably in plant protection.</p> |
