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    • 70. 发明授权
    • Process for preparation of cellulose ester films
    • 纤维素酯薄膜的制备方法
    • US4812279A
    • 1989-03-14
    • US60799
    • 1987-06-12
    • Hiroaki NakagawaMasahiro KondoNoriake Ohishi
    • Hiroaki NakagawaMasahiro KondoNoriake Ohishi
    • B05D1/40B29C41/12B29K1/00B29L7/00C08J5/18G03F1/00G03F1/62B29C41/04
    • G03F1/62C08J5/18C08J2301/08Y10T428/2495Y10T428/24967
    • Disclosed is a process for the preparation of cellulose ester films, which comprises dissolving a cellulose ester in an organic solvent, coating the solution on a substrate under rotation and peeling the film formed on the substrate from the substrate, wherein a second organic solvent having a compatibility with the organic solvent and being a poor solvent to the cellulose ester is added to the organic solvent solution of the cellulose ester to precipitate a cellulose ester having a high molecular weight in the cellulose ester, the cellulose ester having a high molecular weight is separated from the solution, and the remaining cellulose ester solution is formed into a cellulose ester film by the rotational film-forming method.The cellulose ester film prepared according to this process is excellent in the thickness uniformity and free of color nonuniformity or streaks and has good optical properties.
    • 公开了一种制备纤维素酯膜的方法,其包括将纤维素酯溶解在有机溶剂中,在旋转下将溶液涂布在基材上,并从基材上剥离形成在基材上的膜,其中第二有机溶剂具有 将与有机溶剂的相容性和作为纤维素酯的不良溶剂加入到纤维素酯的有机溶剂溶液中以在纤维素酯中沉淀出具有高分子量的纤维素酯,分离高分子量的纤维素酯 通过旋转成膜法​​将残留的纤维素酯溶液形成纤维素酯膜。 根据该方法制备的纤维素酯膜的厚度均匀性优异,不存在颜色不均匀或条纹,并且具有良好的光学性质。