| 摘要 |
Hydrophilic polyurethane/acrylate compositions which form a hydrogel upon immersion in water and is permeable to gases, ions and nonionic materials of various molecular weights comprise 100 pbw of a hydrophilic polyurethane and 10 to 50 pbw of an acrylate which is a monoacrylic or monomethacrylic ester of an alcohol of less than 13 carbon atoms. The compositions may be moulded to form shaped products, and are useful as coatings, moulding compounds absorbents, controlled release agents, ion-exchange resins, in the manufacture of dialysis membranes, cannulae, contact lenses, packaging components, desalination membranes, burn dressings, contraceptive devices, sutures, surgical implants, blood oxygenators, i.u.d., vascular prosthesis, oral delivery systems, battery separate plates, eye bandages, corneal prosthesis, anti-fog coatings, surgical drapes, oxygen exchange membranes, gas-permeable membranes, and in protective and drag-resistant coatings. Medicaments may be distributed in the compositions. |
