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    PROCESS FOR MAKING A SOLUTION OF COPOLYMERS OF MALEIC ANHYDRIDE AND ALKYL VINYL ETHER IN ISOPROPYL ACETATE OF HIGH SPECIFIC VISCOSITY AND AT A HIGH SOLIDS LEVEL
    1.
    发明申请
    PROCESS FOR MAKING A SOLUTION OF COPOLYMERS OF MALEIC ANHYDRIDE AND ALKYL VINYL ETHER IN ISOPROPYL ACETATE OF HIGH SPECIFIC VISCOSITY AND AT A HIGH SOLIDS LEVEL 审中-公开
    在高固含量和高固体含量异丙苯酸异丙酯中制备马来酸酐和烷基乙烯基醚共聚物溶液的方法

    公开(公告)号：WO2005010054A3

    公开(公告)日：2005-04-14

    申请号：PCT/US0341722

    申请日：2003-10-20

    Applicant: ISP INVESTMENTS INC

    Inventor： KWAK YOON TAE ,  KOPOLOW STEPHEN L ,  CARLIN ALAN J

    IPC: C08F222/06 ,  C08F116/12 ,  C08F122/04

    CPC classification number: C08F222/06

    Abstract: A process for making a solution of a copolymer of maleic anhydride (MA) and methyl vinyl ether (MVE) monomers the specific viscosity (SV) of the product being about 2.5-6 preferably 3-5, indicating a weight average molecular weight of substantially above one million, preferably above 1.5 million and a solids content of about 20-45% preferably 30-40, in isopropyl acetate (IPAc), solvent includes the steps of (a) precharging part of MVE in IPAc into a reactor heated to about 50-90°C, and then (b) feeding (i) a solution of MA in IPAc, (ii) the rest of MVE, at a mole ratio of MA:MVE of 1:>=1.5 to 1:

    Abstract translation: 制备马来酸酐（MA）和甲基乙烯基醚（MVE）单体共聚物溶液的方法产物的比粘度（SV）为约2.5-6，优选3-5，表明重均分子量基本上为 （IPAc）中，溶剂包括以下步骤：（a）将IPAc中的部分MVE预加入加热至约100℃的反应器中 然后（b）以MA：MVE摩尔比为1：≥1.5至1：<3的方式进料（i）MA在IPAc中的溶液，（ii）MVE的其余部分， （iii）溶于IPAc中的自由基引发剂，其量为总单体量的0.02-0.3％，优选0.05-0.2％，随时间推移进入反应器。 这种MA / MVE共聚物的粉末是通过从溶液中除去溶剂而制成的。

    Cross-linked terpolymers of high salt tolerance
    5.
    发明专利
    Cross-linked terpolymers of high salt tolerance 未知

    公开(公告)号：AU1571097A

    公开(公告)日：1997-08-22

    申请号：AU1571097

    申请日：1997-01-13

    Applicant: ISP INVESTMENTS INC

    Inventor： KWAK YOON TAE ,  NARAYANAN KOLAZI S ,  KOPOLOW STEPHEN L

    IPC: C08F216/12 ,  C08F222/06

    Abstract: This invention relates to a 1-8% crosslinked terpolymer of a C1-C4 alkyl vinyl ether, maleic anhydride and a hydrophobic C6 to C18 alkyl vinyl ether in a critical molar ratio of from 1-3:1:0.01-0.20, which polymer has a pH of from about 4 to about 11, a Brookfield viscosity of from about 10,000 to about 150,000 cps and is characterized as having desirable salt tolerance enhanced viscosity, stability, low residual monomers and enhanced use characteristics. The invention also relates to liquid or aqueous gel compositions of the crosslinked terpolymer containing a salt and a method for the preparation of said crosslinked terpolymer gel.

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