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    PROCESS FOR MAKING COPOLYMERS OF MALEIC ANHYDRIDE AND A C1 -C4 ALKYL VINYL ETHER HAVING A HIGH SPECIFIC VISCOSITY
    1.
    发明专利
    PROCESS FOR MAKING COPOLYMERS OF MALEIC ANHYDRIDE AND A C1 -C4 ALKYL VINYL ETHER HAVING A HIGH SPECIFIC VISCOSITY 未知

    公开(公告)号：CA2083951A1

    公开(公告)日：1992-02-10

    申请号：CA2083951

    申请日：1991-07-11

    Applicant: ISP INVESTMENTS INC

    Inventor： TAZI MOHAMMED ,  ARDAN JOHN J ,  COHEN JEFFREY M ,  ZAMORA JOHN N

    IPC: C08F16/16 ,  C08F20/02 ,  C08F216/18 ,  C08F222/06 ,  C08L29/10

    Abstract: 2083951 9202564 PCTABS00010 What is described herein is a process for making a copolymer of high specific viscosity by polymerisation of maleic anhydride and a C1-C4 alkyl vinyl ether monomer. The invention involves polymerizing said monomers to form a slurry of said copolymer in excess alkyl vinyl ether as solvent and toluene or an aliphatic organic compound as cosolvent, and is characterized by the steps of: (a) precharging a reactor with C1-C4 alkyl vinyl ether as solvent at a reaction temperature, (b) feeding a mixture of maleic anhydride and a C1-C4 alkyl vinyl ether in substantially stoichiometric amounts, preferably with a slight excess of the alkyl vinyl ether, and at a selected rate, into said precharged reactor, and (c) simultaneously feeding a predetermined mixture of toluene or an aliphatic organic compound and a polymerization initiator continuously over substantially the entire period of polymerization.

    Production of an ethanol solution of ethyl or butyl half-ester of a copolymer
    2.
    发明专利
    Production of an ethanol solution of ethyl or butyl half-ester of a copolymer 未知

    公开(公告)号：AU670264B2

    公开(公告)日：1996-07-11

    申请号：AU3720893

    申请日：1993-02-18

    Applicant: ISP INVESTMENTS INC

    Inventor： ZAMORA JOHN N ,  CARLIN ALAN J ,  TAZI MOHAMMED

    IPC: C08F4/32 ,  C08F2/00 ,  C08F4/28 ,  C08F8/14 ,  C08F16/12 ,  C08F20/02 ,  C08F216/14 ,  C08F222/06 ,  C08F216/12

    Abstract: There is described a process for the production of an ethanol solution of an ethyl or butyl half-ester copolymer of maleic anhydride and a methyl vinyl ether which comprises: (a) copolymerizing the monomers in acetone as solvent by simultaneously feeding molten maleic anhydride, a molar excess of methyl vinyl ether, and a solution of a free radical initiator in acetone, into a reactor precharged with acetone, at about 68 DEG -85 DEG C., preferably 70 DEG -80 DEG C.; (b) esterifying the acetone solution of said copolymer with ethanol or butanol; and then (c) solvent exchanging ethanol for acetone by continuously injecting vapors of ethanol at about 85 DEG -95 DEG C. into said copolymer solution while simultaneously distilling out acetone therefrom at atmospheric pressure.

    Production of an ethanol solution of ethyl or butyl half-ester of a copolymer
    4.
    发明专利
    Production of an ethanol solution of ethyl or butyl half-ester of a copolymer 未知

    公开(公告)号：AU3720893A

    公开(公告)日：1993-10-21

    申请号：AU3720893

    申请日：1993-02-18

    Applicant: ISP INVESTMENTS INC

    Inventor： ZAMORA JOHN N ,  CARLIN ALAN J ,  TAZI MOHAMMED

    IPC: C08F4/32 ,  C08F2/00 ,  C08F4/28 ,  C08F8/14 ,  C08F16/12 ,  C08F20/02 ,  C08F216/14 ,  C08F222/06 ,  C08L31/00

    Abstract: There is described a process for the production of an ethanol solution of an ethyl or butyl half-ester copolymer of maleic anhydride and a methyl vinyl ether which comprises: (a) copolymerizing the monomers in acetone as solvent by simultaneously feeding molten maleic anhydride, a molar excess of methyl vinyl ether, and a solution of a free radical initiator in acetone, into a reactor precharged with acetone, at about 68 DEG -85 DEG C., preferably 70 DEG -80 DEG C.; (b) esterifying the acetone solution of said copolymer with ethanol or butanol; and then (c) solvent exchanging ethanol for acetone by continuously injecting vapors of ethanol at about 85 DEG -95 DEG C. into said copolymer solution while simultaneously distilling out acetone therefrom at atmospheric pressure.

    BENZENE-FREE MALEIC ANHYDRIDE/VINYL ETHER POLYMERS.
    5.
    发明公开
    BENZENE-FREE MALEIC ANHYDRIDE/VINYL ETHER POLYMERS. 失效
    免费苯顺酐/乙烯基醚POLE CASHMERE。

    公开(公告)号：EP0593565A4

    公开(公告)日：1995-03-29

    申请号：EP92914152

    申请日：1992-06-17

    Applicant: ISP INVESTMENTS INC

    Inventor： COHEN JEFFREY M ,  COYLE LAURIE A ,  TAZI MOHAMMED ,  ZAMORA JOHN N

    IPC: C08F2/00 ,  C08F6/00 ,  C08F16/16 ,  C08F20/02 ,  C08F216/18 ,  C08F222/06 ,  C08F34/02

    CPC classification number: C08F222/06 ,  C08F216/18

    Abstract: A process for the manufacture of benzene-free maleic anhydride/lower alkyl vinyl ether polymer having a specific viscosity ranging from about 1.0 to about 5.5 by premixing maleic anhydride and the alkyl vinyl ether in a mole ratio of between about 1:1.1 and about 1:2 in a cosolvent mixture of lower alkyl substituted benzene, a C6-8 alkane, a saturated lower alkyl ether with a lower alkyl vinyl ether as cosolvent and reacting the monomeric complexed mixture at elevated temperature and pressure in continuous contact with a peroxide initiator wherein the specific viscosity is controlled by adjusting the amount of lower alkyl vinyl ether in the cosolvent mixture. The polymeric product is recovered from the resulting slurry by vacuum drying.

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