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    METHOD FOR COATING AND SURFACE TREATMENT OF SOLID PARTICLE IN FLUIDIZED BED
    3.
    发明专利
    METHOD FOR COATING AND SURFACE TREATMENT OF SOLID PARTICLE IN FLUIDIZED BED 失效

    公开(公告)号：JPH07194967A

    公开(公告)日：1995-08-01

    申请号：JP28692294

    申请日：1994-11-21

    Applicant: BASF AG

    Inventor： KURAUSU HARUTO ,  HARUTOMUUTO HIPUSUTO ,  BUORUFUGANGU MATSUTOMAN

    IPC: B01J19/08 ,  B01J2/00 ,  C23C16/44 ,  C23C16/442 ,  C23C16/452 ,  C23C16/50 ,  C23C16/511

    Abstract: PURPOSE: To enable homogeneous coating or surface treatment of a solid particle sensitive to temperature by generating plasma under a specific pressure outside a fluidized bed and passing a plasma-activated gas into the fluidized bed operated under a specific pressure. CONSTITUTION: The plasma is generated outside the fluidized bed under 0.01-500 mbar and is passed into the fluidized bed operated under 0.1-500 mbar. That is, an activated gas reaches a fluidized bed reactor 4 through a pipe 3. Another gas, for example, a non-activated carrier gas or a coating agent, can be fed into the fluidized bed reactor 4 by a pipe 5. An addition of untreated solid particles is done by a pipe 6. The fluidized bed exists on top of a diffuser 7. A decomposed product generated by the plasma is deposited on the solid particles and the coated particles are taken out from the fluidized bed 4 through a pipe 9.

    SUSTAINED RELEASE PREPARATION OF WATER-SOLUBLE SOLID MEDICAL EFFECTIVE SUBSTANCE AND ITS MANUFACTURE
    9.
    发明专利
    SUSTAINED RELEASE PREPARATION OF WATER-SOLUBLE SOLID MEDICAL EFFECTIVE SUBSTANCE AND ITS MANUFACTURE 失效

    公开(公告)号：JPH06211649A

    公开(公告)日：1994-08-02

    申请号：JP28912693

    申请日：1993-11-18

    Applicant: BASF AG

    Inventor： KURAUSU HARUTO ,  HARUTOMUUTO HIPUSUTO ,  YURUGEN DEMUBOFUSUKII ,  RAINHARUTO SHIYUPENGURAA ,  ERUNSUTO FURAIKU

    IPC: A61K9/32 ,  A61K9/22 ,  A61K9/28 ,  A61K9/50 ,  A61K9/52 ,  A61K47/34

    Abstract: PURPOSE: To prepare the subject agent which shows reproducible and uniform release behavior irrespective of layer thickness and is pollution-free and capable of having a high content of active substance. CONSTITUTION: This agent comprises nuclei (carrier) each containing or consisting of a pharmaceutically-active substance, and at least one coating layer which is firmly deposited on the surface of each of the nuclei so as to hinder the active substance from being diffused and also has a 0.01 to 10 μm thickness and the formation of which comprises coating the active substance carrier with a chemical network structure by using a plasma-aided chemical deposition technique. This coating layer contains at least elemental silicon and elemental carbon, preferably in amounts sufficient to provide a 1 to 40 atom % Si content and a 60 to 99 atom % C content, respectively. This preparation of the agent comprises forming the coating layer on the active substance carrier under certain moving conditions by concurrently performing deposition of the coating layer constituents and formation of the chemical network structure in an enclosed space through plasma-aided decomposition of a gaseous mixture contg. at least one organosilicic compound (preferably, hexamethyldisiloxane).

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