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公开(公告)号:US3816150A
公开(公告)日:1974-06-11
申请号:US21382471
申请日:1971-12-29
申请人: DAICEL LTD
发明人: ISHII K , KOJIMA K , ISHIKAWA K
IPC分类号: C08L1/00 , B01D71/16 , C08B3/16 , C08B3/28 , C08J7/00 , C08L1/12 , C08B27/44 , C08B27/26 , C08B27/30 , C08B27/72
CPC分类号: B01D71/16 , B01D67/0093 , C08B3/16 , C08B3/28 , C08J7/045 , C08J2301/14
摘要: A process for modifying cellulose acetate by treating an object made of a mixed ester of cellulose and (1) acetic acid and (2) a polybasic carboxylic acid, i.e., a dibasic carboxylic acid and/or tribasic carboxylic acid, with a divalent or higher metal salt to impart solvent resistance to the object.
摘要翻译: 通过处理由纤维素和(1)乙酸的混合酯制成的物体和(2)多元羧酸(即二元羧酸和/或三元羧酸)与二价或更高级的化合物来改性乙酸纤维素的方法 金属盐,以赋予物体耐溶剂性。
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公开(公告)号:US3804932A
公开(公告)日:1974-04-16
申请号:US27129872
申请日:1972-07-13
申请人: DAICEL LTD
发明人: ISHII K , KOJIMA K , ISHIKAWA K
CPC分类号: B01D67/0011 , B01D71/16 , B01D2323/16 , C08J9/28 , C08J2201/0502 , C08J2301/12
摘要: SEMIPERMEABLE MEMBRANES FOR USE IN REVERSE OSMOSIS OR ULTRAFILTRATION ARE PREPARED BY CAST MOLDING A CAST MOLDING SOLUTION COMPRISING CELLULOSE ACETATE, A SWELLING AGENT AND A COMPOSITE SOLVENT COMPRISING ACETONE AS A FIRST COMPONENT AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF 1,4-DIOXANE, 1,3-DIOXOLANE, DIMETHYL FORMAMIDE AND 2-METHOXYETHYL ACETATE AS A SECOND COMPONENT. THE SOLUTION IS CAST MOLDED AT AMBIENT TEMPERATURE.
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