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PROCESS FOR THE PREPARATION OF PRESSURE RESISTANT MICROCAPSULES CONTAINING AN OUTER POLYAMIDE WALL AND AN INNER STRUCTURE OF POLYURETHANE-POLYUREA
PROCESS FOR THE PREPARATION OF PRESSURE RESISTANT MICROCAPSULES CONTAINING AN OUTER POLYAMIDE WALL AND AN INNER STRUCTURE OF POLYURETHANE-POLYUREA
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机译:包含外聚酰胺酰胺壁和聚氨酯-聚脲内部结构的耐压微胶囊的制备方法
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摘要
What are disclosed are pressure-resistant microcapsules comprising a polyamide shell having therein a structural mass of a polyurethane-polyurea polymer and an encapsulated water-immiscible liquid phase, and methods for making the same by dispersing a water-immiscible liquid phase in an aqueous phase and subsequently or simultaneously admixing therewith an aqueous solution of a diamine or polyamine, said dispersed phase comprising a polyamide forming acid compound, diisocyanate or polyisocyanate or a prepolymer thereof, and an inert organic aprotic hydrophilizing agent.
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