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AssigneeNano Active Film S.R.L.
InventorsAlexandra Romina Albunia, Riccardo Bianchi, Luciano Di Maio, Maurizio Galimberti, Gaetano Guerra, Roberto Pantani, Stanislao Senatore
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There is described a new disordered nanoporous crystalline form of syndiotactic polystyrene, characterized by a specific X-ray diffractrogram, the process for its preparation and various articles comprising this form of s-PS. This disordered nanoporous crystalline form exhibits empty crystalline cavities of nanometric sizes, and in this case performs the function of absorbing molecules with low molecular mass and is useful in particular as functionally active packaging for plant products.
Syndiotactic polystyrene (s-PS) in disordered nanoporous crystalline form, characterized by an X-ray diffraction spectrum as measured by an automatic powder diffractometer, wherein at 2θ (CuKα)<15° there are present only two peaks with maxima in the intervals 8.7°<20 (CuKα)<9.8° and 13.0°<20 (CuKα)<13.8° and with a half height width of at least 2°.
Amorphous syndiotactic polystyrene in powder form with grain size ≦500 μm, having an X-ray diffraction spectrum which does not contain clear peaks but only two broad halos with maximum diffraction located at diffraction angles 2θ CuKα of nearly 10° and 19.5° (FIG. 1B).
Process for producing a functionally active article wherein the process comprises the deposition on at least a portion of said article of a coating layer comprising particles of syndiotactic polystyrene in amorphous form having an average size of less than 300 μm, said deposition taking place:
Dependencies are inferred from the claim text.