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    • 8. 发明申请
    • MALEIC ANHYDRIDE/ALKYL VINYL ETHER POLYMERIZATION PROCESS
    • 马来酸酐/烷基乙烯基聚合方法
    • WO1992002564A1
    • 1992-02-20
    • PCT/US1991004875
    • 1991-07-11
    • ISP INVESTMENTS INC.
    • ISP INVESTMENTS INC.TAZI, MohammedARDAN, John, J.COHEN, Jeffrey, M.ZAMORA, John, N.
    • C08F16/16
    • C08F216/18C08F222/06
    • 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.
    • 本文描述的是通过马来酸酐和C1-C4烷基乙烯基醚单体的聚合制备高比粘度的共聚物的方法。 本发明涉及使所述单体聚合以形成作为溶剂的过量烷基乙烯基醚中的所述共聚物的浆液和作为共溶剂的甲苯或脂族有机化合物,其特征在于以下步骤:(a)用C1-C4烷基乙烯基 乙醚作为溶剂,(b)将基本上化学计量的马来酸酐和C1-C4烷基乙烯基醚的混合物,优选稍微过量的烷基乙烯基醚,并以选定的速率进料到所述预充电 反应器,和(c)在基本上整个聚合期间内同时进料预定的甲苯或脂族有机化合物和聚合引发剂的混合物。