Physical reutilization of siliconized sheets
AssigneeEvonik Operations GmbH
InventorsWilfried Knott, Horst Dudzik, Dietmar Schaefer
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Abstract
The method for the physical reutilization of sheet-like siliconized structures comprises treating the sheet-like siliconized structure in a liquid digestion system comprising acetic anhydride and/or an acetoxysiloxane, and at least one Brøonsted acid, optionally solvent, preferably with addition of acetic acid, and removing the desiliconized sheet-like structure from the liquid phase.
Claims21
A method for the physical reutilization of a sheet-like siliconized structure comprising the following steps:
- a) treating the sheet-like siliconized structure in a liquid digestion system comprising acetic anhydride and/or an acetoxysiloxane, and at least one Brønsted acid, and optionally solvent, and
- b) removing the desiliconized sheet-like structure from the liquid phase.
(canceled)
A method for the physical reutilization of a siliconized paper or a siliconized polymeric film, the method comprising the following steps:
- a) treating the siliconized paper or a siliconized polymeric film in a liquid digestion system comprising acetic anhydride and/or an acetoxysiloxane, and at least one Brønsted acid, and optionally solvent, and
- b) removing the desiliconized siliconized paper or a siliconized polymeric film from the liquid phase.
Dependencies are inferred from the claim text.