An ion complex which comprises a water-insoluble polyion (P) and a water-soluble polyion (A); and is insoluble in water and soluble in an aqueous organic solvent. Such an ion complex becomes a coating material which can preferably be used for coating of various ionic substances (e.g., substance having biological activity such as an anticoagulant property or an antibacterial property).

Un complejo del ion que abarca un polyion insoluble en agua (p) y un polyion soluble en agua (a); y es insoluble en agua y soluble en un solvente orgánico acuoso. Tal complejo del ion se convierte en un material de capa que se puede utilizar preferiblemente para la capa de varias sustancias iónicas (e.g., sustancia que tiene actividad biológica tal como una característica del anticoagulante o una característica anti-bacteriana).

 
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