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    PROCESS FOR THE MANUFACTURE OF VINYL CHLORIDE POLYMERS
    12.
    发明专利
    PROCESS FOR THE MANUFACTURE OF VINYL CHLORIDE POLYMERS 未知

    公开(公告)号：CA1113942A

    公开(公告)日：1981-12-08

    申请号：CA318497

    申请日：1978-12-22

    Applicant: HOECHST AG

    Inventor： FISCHER EDGAR ,  BRANDRUP JOHANNES ,  WEINLICH JURGEN

    IPC: C08F14/00 ,  C08F2/00 ,  C08F14/06 ,  C08F259/04 ,  C23F15/00 ,  C07D277/82 ,  C08F114/06 ,  C08F214/06

    Abstract: The present invention provides a process for the manufacture of vinyl chloride polymers by polymerization of the monomer or monomer mixture in aqueous dispersion in the presence of radical-forming catalysts and optionally suspension stabilizers, emulsifiers and further polymerization auxiliaries, which comprises carrying out the polymerization in a reactor the inner walls of which and other parts were polymer deposits may form are coated partially or entirely with a coating containing determined compounds of the formula In accordance with this invention, a substantial suppression of polymer deposit formation is achieved especially in the case of the vinyl chloride copolymers.

    PROCESS FOR THE MANUFACTURE OF VINYL CHLORIDE POLYMERS
    14.
    发明专利
    PROCESS FOR THE MANUFACTURE OF VINYL CHLORIDE POLYMERS 未知

    公开(公告)号：CA1102490A

    公开(公告)日：1981-06-02

    申请号：CA295769

    申请日：1978-01-26

    Applicant: HOECHST AG

    Inventor： FISCHER EDGAR ,  BRANDRUP JOHANNES ,  WEINLICH JUERGEN

    IPC: C08F14/00 ,  C07D277/82 ,  C08F2/00 ,  C08F2/16 ,  C08F291/00 ,  C08F14/06 ,  C08F289/00 ,  C08F2/18 ,  B01J3/04

    Abstract: This invention is directed to a process for the preparation of vinyl chloride homopolymers, copolymers thereof with other monomers or graft copolymers containing at least 50% by weight of vinyl chloride units. The monomer or monomer mixture is polymerized in aqueous dispersion in the presence of a radical-forming catalyst in a reactor. The inner walls of the reactor and other portions thereof where polymer deposits may form are coated with a coating containing a compound of the formula I (I) wherein R1 is hydrogen, a hydrocarbon radical of aliphatic character having from 1 to 12 carbon atoms, an acyl having from 2 to 8 carbon atoms, R2 is R1 or R2 and R1 together are alkylidene or aralkylidene, R3 is hydrogen or a hydrocarbon radical of aliphatic character having from 1 to 12 carbon atoms; or at least one of the radicals, R1, R2 or R3 being hydrogen, R4 is R3, furthermore alkoxy having from 1 to 6 carbon atoms, hydroxyl, halogen, amino, (di)alkylamino having from 1 to 12 carbon atoms, carboxyl, sulfoxyl (=SO3H); R5 is R4; or R4 and R5 together are an aromatic ring.

    15.
    发明专利
    未知

    公开(公告)号：DD139860A5

    公开(公告)日：1980-01-23

    申请号：DD20969078

    申请日：1978-12-12

    Applicant: HOECHST AG

    Inventor： FISCHER EDGAR ,  BRANDRUP JOHANNES ,  WEINLICH JUERGEN

    IPC: C08F14/00 ,  C08F2/00 ,  C08F14/06 ,  C08F259/04 ,  C23F15/00 ,  C08F2/18

    Abstract: The present invention provides a process for the manufacture of vinyl chloride polymers by polymerization of the monomer or monomer mixture in aqueous dispersion in the presence of radical-forming catalysts and optionally suspension stabilizers, emulsifiers and further polymerization auxiliaries, which comprises carrying out the polymerization in a reactor the inner walls of which and other parts where polymer deposits may form are coated partially or entirely with a coating containing determined compounds of the formula In accordance with this invention, a substantial suppression of polymer deposit formation is achieved especially in the case of vinyl chloride copolymers.

    16.
    发明专利
    未知

    公开(公告)号：DD134108A5

    公开(公告)日：1979-02-07

    申请号：DD20341678

    申请日：1978-01-25

    Applicant: HOECHST AG

    Inventor： FISCHER EDGAR ,  BRANDRUP JOHANNES ,  WEINLICH JUERGEN

    IPC: C08F14/00 ,  C07D277/82 ,  C08F2/00 ,  C08F2/16 ,  C08F291/00 ,  C08F14/16

    Abstract: This invention is directed to a process for the preparation of vinyl chloride homopolymers, copolymers thereof with other monomers or graft copolymers containing at least 50% by weight of vinyl chloride units. The monomer or monomer mixture is polymerized in aqueous dispersion in the presence of a radical-forming catalyst in a reactor. The inner walls of the reactor and other portions thereof where polymer deposits may form are coated with a coating containing a compound of the formula I (I) wherein R1 is hydrogen, a hydrocarbon radical of aliphatic character having from 1 to 12 carbon atoms, an acyl having from 2 to 8 carbon atoms, R2 is R1 or R2 and R1 together are alkylidene or aralkylidene, R3 is hydrogen or a hydrocarbon radical of aliphatic character having from 1 to 12 carbon atoms; or at least one of the radicals, R1, R2 or R3 being hydrogen, R4 is R3, furthermore alkoxy having from 1 to 6 carbon atoms, hydroxyl, halogen, amino, (di)alkylamino having from 1 to 12 carbon atoms, carboxyl, sulfoxyl (=SO3H); R5 is R4; or R4 and R5 together are an aromatic ring.

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