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    PRECIPITATION POLYMERIZATION OF COPOLYMERS OF A VINYL LACTAM AND A POLYMERIZABLE CARBOXYLIC ACID USING SUB-SURFACE FEEDING
    1.
    发明申请
    PRECIPITATION POLYMERIZATION OF COPOLYMERS OF A VINYL LACTAM AND A POLYMERIZABLE CARBOXYLIC ACID USING SUB-SURFACE FEEDING 审中-公开
    乙烯基乳酸酯共聚物和使用亚表面进料的聚合羧酸的降解聚合

    公开(公告)号：WO1991018929A1

    公开(公告)日：1991-12-12

    申请号：PCT/US1991002763

    申请日：1991-04-24

    Applicant: ISP INVESTMENTS INC.

    Inventor： ISP INVESTMENTS INC. ,  SHIH, Jenn, S. ,  SMITH, Terry, E. ,  ZAMORA, John ,  ECONOMIDIS, Minas

    IPC: C08F02/14

    CPC classification number: C08F226/10

    Abstract: What is described herein is an improved precipitation polymerization process and copolymer products produced thereby. The process herein is carried out by charging a reactor with a solvent in which the copolymer product is substantially insoluble over the entire compositional range of the copolymer, preferably heptane or cyclohexane, and a polymerization initiator, heating to 50° to 150 °C, agitating, and then simultaneously feeding selected amounts of a vinyl lactam and a polymerizable carboxylic acid into said reactor below the surface of the solvent while continuing to agitate the mixture to precipitate the copolymer from solution as a fine, white powder, and recovering the copolymer of defined composition.

    CONTINUOUS, SOLVENT-FREE PROCESS FOR MAKING COPOLYMERS OF MALEIC ANHYDRIDE AND C 1-4? ALKYL VINYL ETHER
    2.
    发明公开
    CONTINUOUS, SOLVENT-FREE PROCESS FOR MAKING COPOLYMERS OF MALEIC ANHYDRIDE AND C 1-4? ALKYL VINYL ETHER 有权
    用于生产马来酸酐和C1-4的共聚物连续无溶剂法制？ 烷基乙烯基醚

    公开(公告)号：EP1299425A1

    公开(公告)日：2003-04-09

    申请号：EP01930999.6

    申请日：2001-05-02

    Applicant: ISP INVESTMENTS INC.

    Inventor： BISS, Russell ,  COHEN, Jeffrey ,  ZAMORA, John ,  PLOCHOCKA, Krystyna ,  LYNN, Jeffrey, A.

    IPC: C08F2/02 ,  C08F34/02

    CPC classification number: C08F222/06 ,  C08F2/02 ,  C08F216/18 ,  Y02P20/582

    Abstract: A continuous, solvent-free process for obtaining solvent-free, fine white powders of high molecular weight alternating copolymers of maleic anhydride and a C1-C4 alkyl vinyl ether, without odor or taste, having the molecular structure (A-B)n, where A is maleic anhydride, B is an alkyl vinyl ether and n is an integer indicative of the molecular weight of the copolymer, which comprises feeding alkyl vinyl ether as reactant and solvent in excess over the desired 1:1 mole ratio of A:B in the copolymer, molten maleic anhydride and a free radical initiator, continuously at predetermined feeding rates into a reactor heated at a reaction temperature of about 50° to 100 °C, holding the reactants in the reactor for a predetermined average residence time, withdrawing reaction product, residual alkyl vinyl ether and initiator at the same rate as the feed rate of reactants into the reactor, stripping residual alkyl vinyl ether from the reaction product, drying the copolymer obtained of any remaining traces of alkyl vinyl ether, and recycling recovered alkyl vinyl ether back into reactor as reactant and solvent.

    PRECIPITATION POLYMERIZATION OF COPOLYMERS OF A VINYL LACTAM AND A POLYMERIZABLE CARBOXYLIC ACID USING SUB-SURFACE FEEDING
    6.
    发明公开
    PRECIPITATION POLYMERIZATION OF COPOLYMERS OF A VINYL LACTAM AND A POLYMERIZABLE CARBOXYLIC ACID USING SUB-SURFACE FEEDING 失效
    的共聚物OFF沉淀和N-乙烯基内酰胺的可共聚羧酸USING FEED的表面下。

    公开(公告)号：EP0532536A1

    公开(公告)日：1993-03-24

    申请号：EP91909674.0

    申请日：1991-04-24

    Applicant: ISP INVESTMENTS INC.

    Inventor： SHIH, Jenn, S. ,  SMITH, Terry, E. ,  ZAMORA, John ,  ECONOMIDIS, Minas

    IPC: C08F2 ,  C08F26 ,  C08F220 ,  C08F226

    CPC classification number: C08F226/10

    Abstract: Procédé de polymérisation par précipitation et produits copolymères ainsi produits. On met en oeuvre le procédé en chargeant un réacteur d'un solvant dans lequel le produit copolymère est insoluble sur la totalité de l'éventail de composés du copolymère, de préférence de l'heptane ou du cyclohexane, et d'un initiateur de polymérisation, par chauffage entre 50° et 150 °C, par agitation et ensuite par acheminement simultané de quantités sélectionnées d'un lactame vinylique et d'un acide carboxylique polymérisable dans ledit réacteur au-dessous de la surface du solvant, tout en continuant à agiter le mélange afin de précipiter le copolymère tiré d'une solution, sous forme d'une fine poudre blanche, et à récupérer le copolymère de la composition définie.

    CONTINUOUS, SOLVENT-FREE PROCESS FOR MAKING COPOLYMERS OF MALEIC ANHYDRIDE AND C 1-4? ALKYL VINYL ETHER
    7.
    发明授权
    CONTINUOUS, SOLVENT-FREE PROCESS FOR MAKING COPOLYMERS OF MALEIC ANHYDRIDE AND C 1-4? ALKYL VINYL ETHER 有权
    用于生产马来酸酐和C1-4的共聚物连续无溶剂法制？ 烷基乙烯基醚

    公开(公告)号：EP1299425B1

    公开(公告)日：2005-10-12

    申请号：EP01930999.6

    申请日：2001-05-02

    Applicant: ISP INVESTMENTS INC.

    Inventor： BISS, Russell ,  COHEN, Jeffrey, Dr. ,  ZAMORA, John ,  PLOCHOCKA, Krystyna ,  LYNN, Jeffrey, A.

    IPC: C08F222/04 ,  C08F216/18

    CPC classification number: C08F222/06 ,  C08F2/02 ,  C08F216/18 ,  Y02P20/582

    Abstract: A continuous, solvent-free process for obtaining solvent-free, fine white powders of high molecular weight alternating copolymers of maleic anhydride and a C1-C4 alkyl vinyl ether, without odor or taste, having the molecular structure (A-B)n, where A is maleic anhydride, B is an alkyl vinyl ether and n is an integer indicative of the molecular weight of the copolymer, which comprises feeding alkyl vinyl ether as reactant and solvent in excess over the desired 1:1 mole ratio of A:B in the copolymer, molten maleic anhydride and a free radical initiator, continuously at predetermined feeding rates into a reactor heated at a reaction temperature of about 50 DEG to 100 DEG C, holding the reactants in the reactor for a predetermined average residence time, withdrawing reaction product, residual alkyl vinyl ether and initiator at the same rate as the feed rate of reactants into the reactor, stripping residual alkyl vinyl ether from the reaction product, drying the copolymer obtained of any remaining traces of alkyl vinyl ether, and recycling recovered alkyl vinyl ether back into reactor as reactant and solvent.

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