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    4.
    发明专利
    未知

    公开(公告)号：NO780291L

    公开(公告)日：1978-07-28

    申请号：NO780291

    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 ,  C08F

    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.

    5.
    发明专利
    未知

    公开(公告)号：NO782480L

    公开(公告)日：1979-06-26

    申请号：NO782480

    申请日：1978-07-18

    Applicant: HOECHST AG

    Inventor： FISCHER EDGAR ,  BRANDRUP JOHANNES ,  WEINLICH JUERGEN

    IPC: C08F14/00 ,  C08F2/00 ,  C08F14/06 ,  C08F259/04 ,  C23F15/00 ,  C08F

    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.

    PROCESS FOR THE PREPARATION OF FLUOROCARBON POLYMERS CONTAINING CARBOXYL GROUPS, AND CERTAIN STARTING MATERIALS REQUIRED FOR THIS, AND THE FLUOROSULFATO COMPOUNDS FORMED AS INTERMEDIATE PRODUCTS IN THE PROCESS
    10.
    发明专利
    PROCESS FOR THE PREPARATION OF FLUOROCARBON POLYMERS CONTAINING CARBOXYL GROUPS, AND CERTAIN STARTING MATERIALS REQUIRED FOR THIS, AND THE FLUOROSULFATO COMPOUNDS FORMED AS INTERMEDIATE PRODUCTS IN THE PROCESS 未知

    公开(公告)号：CA1231198A

    公开(公告)日：1988-01-05

    申请号：CA422387

    申请日：1983-02-25

    Applicant: HOECHST AG

    Inventor： BLICKLE PETER ,  BRANDRUP JOHANNES ,  MILLAUER HANS ,  SCHWERTFEGER WERNER ,  SIEGEMUND GUENTER

    IPC: C08F8/12

    Abstract: of the disclosure: Substantially non-crosslinked fluorocarbon polymers containing carboxyl groups are prepared starting from non-crosslinked and in some cases new, fluorocarbon polymers in which the linear macromolecules carry side chains containing the end group -CHFX (X is F or CF3). The starting polymers are first reacted with peroxodisulfuryl difluoride FSO2O-OSO2F to give the corresponding fluorosulfato derivatives containing the side chain end groups (X is F or CF3). In the event that X is F, these derivatives are then converted into the corresponding carboalkoxy derivatives by means of an alcohol, the fluorosulfato group being split off, and these carboalkoxy derivatives are then converted by saponification into the products containing the free carboxyl groups; the fluorosulfato derivatives can also be hydrolyzed with water, if appropriate in the presence of an inert solvent and/or bases, to give, without further treatment, the products containing the free carboxyl groups. The fluorosulfato derivatives in which X is CF3 in the side chain end groups are first decomposed in the presence of catalytic amounts of alkali metal fluorides and/or aprotic nitrogen bases to give the products containing the side chain end groups and the latter are then hydrolyzed to give the products containing the free carboxyl group. Virtually non-crosslinked fluorocarbon polymers containing carboxyl groups are of industrial importance in the form of cation exchanger membranes in electrolytic cells, particularly in chlor-alkali electrolysis.

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