Back to results
US 2004/0017022 A1Published application
Process for production of cellulose acylate films
OwnerTsukasa Yamadainventor
Life of this patent
Estimating the term…
Abstract
A cellulose acetate film is produced from a solution of a cellulose acylate in a mixed solvent. The solvent comprises a main solvent and an alcohol. The main solvent essentially does not contain chlorine atom. The main solvent has a solubility parameter of 16 to 23. The alcohol has a solubility parameter of 20 to 30.
Claims11
A process for producing a cellulose acylate film, comprising the steps of:
- dissolving cellulose acylate in a mixed solvent comprising a main solvent and an alcohol to prepare a solution, wherein the main solvent essentially does not contain chlorine atom, the main solvent has a solubility parameter of 16 to 23, and the alcohol has a solubility parameter of 20 to 30;
- and forming the film from the prepared solution.
Dependencies are inferred from the claim text.