公开(公告)号：US20050187385A1

公开(公告)日：2005-08-25

申请号：US11117567

申请日：2005-04-29

申请人： Yukiko Nakano ,  Hiroki Taniguchi ,  Katako Matsumoto

发明人： Yukiko Nakano ,  Hiroki Taniguchi ,  Katako Matsumoto

IPC分类号： C08B3/06 ,  C08J5/18 ,  D01F2/28 ,  C08B3/22

CPC分类号： C08J5/18 ,  C08B3/06 ,  C08J2301/12 ,  D01F2/28

摘要： Using the dope containing the following cellulose acetate (1), (2), or (3), a film is prepared by the casting process: (1) a cellulose acetate having carboxyl groups binding to at least one member selected from the group consisting of a cellulose acetate and a hemicellulose acetate, wherein at least a part of said carboxyl groups are in an acidic form; (2) a cellulose acetate containing at least one member selected from the group consisting of an acid having an acid dissociation exponent pKa of 1.93 to 4.50 in water, an alkali metal salt of said acid and an alkaline earth metal of said acid; or (3) a cellulose acetate containing an alkali metal or an alkaline earth metal wherein the total content of an alkaline metal and an alkaline earth metal in 1 gram of the cellulose acetate is from an effective amount to 5.5×10−6 equivalent (in terms of ion equivalent). The above cellulose acetate is also useful for spinning process. The cellulose acetate includes a cellulose diacetate and a cellulose triacetate. The cellulose acetate of the present invention has high film-releasability from a support and excellent optical characteristics.

摘要翻译： 使用含有以下醋酸纤维素（1），（2）或（3）的涂料，通过流延法制备膜：（1）具有羧基的乙酸纤维素结合至少一种选自 的乙酸纤维素和乙酸半纤维素，其中所述羧基的至少一部分为酸性形式; （2）含有至少一种选自水中酸解离指数pKa为1.93至4.50的酸的所述乙酸纤维素，所述酸的碱金属盐和所述酸的碱土金属; 或（3）含有碱金属或碱土金属的乙酸纤维素，其中1克乙酸纤维素中的碱金属和碱土金属的总含量为有效量为5.5×10 -6〜 / SUP>等效（以离子当量计）。 上述醋酸纤维素也可用于纺丝过程。 乙酸纤维素包括二乙酸纤维素和三醋酸纤维素。 本发明的乙酸纤维素与支持体的剥离性高，光学特性优异。