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10 条记录 (耗时 0.011 秒)

    Derivatized ethyl cellulose
    1.
    发明授权
    Derivatized ethyl cellulose 失效
    衍生的乙基纤维素

    公开(公告)号：US3896107A

    公开(公告)日：1975-07-22

    申请号：US44956874

    申请日：1974-03-08

    申请人： HERCULES INC

    发明人： KLUG EUGENE D

    IPC分类号： C08L1/00 ,  A61K9/28 ,  C08B11/193 ,  C08B15/06 ,  C09D101/26 ,  C07C97/00

    CPC分类号： C08B11/193 ,  A61K9/2866 ,  C08B15/06

    摘要： Modified cellulose derivatives are disclosed which contain tertiary amine group substituents in the amount of 0.05 to 0.4 mole per anhydroglucose unit of the cellulose. The modified ethyl cellulose materials are insoluble in water but soluble in dilute aqueous acid solutions. They are useful, e.g., as coating materials for medicaments since their acid solubility makes them soluble in stomach acids. They are also useful in applications where conventional ethyl cellulose is employed such as lacquer, varnish and adhesive applications.

    Carboxyalkyl modified ethyl cellulose
    7.
    发明授权
    Carboxyalkyl modified ethyl cellulose 失效
    羧甲基改性乙基纤维素

    公开(公告)号：US3896108A

    公开(公告)日：1975-07-22

    申请号：US46895774

    申请日：1974-05-10

    申请人： HERCULES INC

    发明人： KLUG EUGENE D

    IPC分类号： C08L1/00 ,  A61K9/28 ,  C08B11/04 ,  C08B11/193 ,  C09D101/26 ,  C09J101/00 ,  C08B11/00

    CPC分类号： C08B11/193 ,  A61K9/2866

    摘要： Cellulose derivatives are described comprising a normally waterinsoluble ethyl cellulose having 0.05 to 0.4 carboxyalkyl groups per anhydroglucose unit of the cellulose. These derivatives are insoluble in water and in acid medium but are soluble in basic aqueous media. They also have been found to be thermogelling. The use of these derivatives as coating materials and as shaped objects via forming techniques making use of the thermogelling property is disclosed.