发明名称 |
PROCESS FOR PREPARATION OF CELLULOSE ESTER FILMS |
摘要 |
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. |
申请公布号 |
KR940004535(B1) |
申请公布日期 |
1994.05.25 |
申请号 |
KR19870005951 |
申请日期 |
1987.06.12 |
申请人 |
MITSUI PETROCHEMICAL IND. LTD. |
发明人 |
NAKAGAWA, HIROAKI;KONDO, MASAHIRO;OHISHI, NORIAKE |
分类号 |
B05D1/40;B29C41/12;B29K1/00;B29L7/00;C08J5/18;G03F1/00;G03F1/62 |
主分类号 |
B05D1/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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