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    Encapsulation process
    2.
    发明授权
    Encapsulation process 失效

    公开(公告)号：US3575882A

    公开(公告)日：1971-04-20

    申请号：US3575882D

    申请日：1968-09-25

    申请人： PENNWALT CORP

    发明人： VANDEGAER JAN E ,  MEIER FRANK G

    IPC分类号： A61K9/50 ,  B01J13/16 ,  B01J13/02 ,  B44D1/02

    CPC分类号： A61K9/5031 ,  B01J13/16 ,  Y10T428/2989

    摘要： IN A PROCESS FOR ENCAPSULATION BY INTERFACIAL CONDENSATION OF A PAIR OF COMPLEMENTARY, DIRECT-ACTING, ORGANIC, POLYCONDENSATE-FORMING INTERMEDIATES IN SEPARATE FIRST AND SECOND LIQUIDS WHICH ARE SUBSTANTIALLY IMMISCIBLE, THEREBY ENCAPSULATING DROPLETS OF THE FIRST LIQUID WITHIN A SKIN OF THE PRODUCED POLYCONDENSATE, THE CHARACTER OF THE TWO LIQUIDS BEING SUCH THAT THE POLYCONDENSATE SKIN GROWS AWAY FROM THE FIRST LIQUID AND INTO THE SECOND LIQUID AT ANY INTERFACE THEREBETWEEN, THE IMPROVEMENT FOR PREVENTING COALESCENCE AND AGGLOMERATION OF THE CAPSULES BOTH DURING AND AFTER THE TERMINATION OF POLYCONDENSATE SKIN GROWTH, CHARACTERIZED BY THE PRESENCE OF A SOLID FINELY DIVIDED DISPERING AGENT IN THE SECOND LIQUID WHILE THE POLYCONDENSATE SKIN IS GROWING, THE AGBENT BEING SUBSTANTIALLY INSOLUBLE IN THE FIRST AND SECOND LIQUIDS, AND BEING OF SUFFICIENT PARTICLE SIZE TO BE RETAINED ON THE POLYCONDENSATE SKIN SURFACE.

    Encapsulation by interfacial polycondensation
    3.
    发明授权
    Encapsulation by interfacial polycondensation 失效
    通过界面聚合进行包封

    公开(公告)号：US3577515A

    公开(公告)日：1971-05-04

    申请号：US3577515D

    申请日：1968-03-04

    申请人： PENNWALT CORP

    发明人： VANDEGAER JAN E

    IPC分类号： A01N25/28 ,  B01J13/16 ,  B01J13/18 ,  B05D7/00 ,  B44C1/17 ,  C08G18/08 ,  C08G69/00 ,  A01N17/00 ,  B01J13/02 ,  B44D1/02

    CPC分类号： C08G69/00 ,  A01N25/28 ,  B01J13/16 ,  B01J13/18 ,  B44C1/1704 ,  C08G18/0861

    摘要： PROCEDURE FOR ENCAPSULATION OF MATERIALS INITIALLY EMBODIED, CONTAINED OR CARRIED IN LIQUID IS EFFECTED BY INTERFACIAL POLYCONDENSATION BETWEEN COACTING INTERMEDIATES RESPECTIVELY IN IMMISCIBLE LIQUIDS, DROPLETS OF ONE LIQUID WHICH IS TO BE ENCAPSULATED AND WHICH CONTAINS ONE INTERMEDIATE BEING FIRST ESTABLISHED IN A BODY OF THE OTHER LIQUID. THEREAFTER THE SECOND INTERMEDIATE IS INCORPORATED IN THE OTHER LIQUID TO PRODUCE MINUTE CAPSULES OF THE FIRST LIQUID HAVING A SKIN OF POLYCONDENSATE, E.G. POLYAMIDE, POLYSULFONAMIDE, POLYESTER, POLYCARBONATE, POLYURETHANE, OR POLYUREA. NOTABLY EFFECTIVE OPERATION INVOLVES CONTINUOUSLY SUPPLYING BOTH THE FIRST LIQUID CONTAINING THE FIRST INTERMEDIATE, AND THE SECOND LIQUID, INTO A REGION WHERE CONTINOUS AGITATION EFFECTS DISPERSION OF THE FIRST LIQUID AS DROPLETS, THE DISPERSION BEING CONTINUOUSLY BROUGHT TOGETHER WITH THE SECOND INTERMEDIATE, THEREBY CONTINUOUSLY ESTABLISHING THE DROPLET DISPERSION IN LIQUID CONTAINING THE SECOND INTERMEDIATE, AND IN CONSEQUENCE CONTINUOUSLY PRODUCING ENCAPSULATED DROPLETS BY INTERFACIAL POLYCONDENSATION BETWEEN THE INTERMEDIATES.