Removing heat of reaction in copolymerization of ethylene in aqueous dispersion
    2.
    发明授权
    Removing heat of reaction in copolymerization of ethylene in aqueous dispersion 失效
    去除水分散体中乙烯共聚反应的热量

    公开(公告)号:US3891603A

    公开(公告)日:1975-06-24

    申请号:US42909073

    申请日:1973-12-28

    Applicant: BASF AG

    Abstract: Copolymers of ethylene with 10 to 98 percent by weight of conventional comonomers are made by copolymerization in aqueous dispersion, at least a part of the heat of polymerization being removed by evaporation of the ethylene. The vapors are cooled by a cooling medium by heat exchange, in a cooling zone situated above the polymerization vessel and communicating with the latter, the hot vapors being fed to the upper end of the cooling zone, the cooled vapors returning to the polymerization vessel, so that the vapors are cooled by the cooling medium while they are flowing downward.

    Abstract translation: 通过在水分散体中共聚制备乙烯与10至98重量%的常规共聚单体的共聚物,通过乙烯蒸发除去至少一部分聚合热。 蒸汽通过热交换由冷却介质冷却,在位于聚合容器上方的冷却区中并与其连通,热蒸汽被供给到冷却区的上端,冷却的蒸气返回聚合容器, 使得蒸汽在冷却介质向下流动时被冷却。

    Microcapsules having walls made of copolymer of methylmethacrylate and acetylacetates of mono(meth) acrylates of aliphatic diols
    3.
    发明授权
    Microcapsules having walls made of copolymer of methylmethacrylate and acetylacetates of mono(meth) acrylates of aliphatic diols 失效
    微胶囊具有由甲基丙烯酸甲酯和脂肪族二醇的单(甲基)丙烯酸酯的乙酰乙酸酯的共聚物制成的壁

    公开(公告)号:US3872023A

    公开(公告)日:1975-03-18

    申请号:US24492972

    申请日:1972-04-17

    Applicant: BASF AG

    CPC classification number: B01J13/125 Y10T428/2987

    Abstract: The invention relates to microcapsules having a wall material composed of optionally crosslinked copolymers comprising olefinically unsaturated monomers containing hydrophilic groups such as an acetylacetate of a mono(meth) acrylate of an aliphatic diol, and olefinically unsaturated monomers containing hydrophobic groups, such as methyl methacrylate, and a process for the manufacture of microcapsules.

    Abstract translation: 本发明涉及具有由任选交联的共聚物组成的壁材料的微胶囊,所述共聚物包含含有亲水基团的烯属不饱和单体,例如脂族二醇的单(甲基)丙烯酸酯的乙酰乙酸酯和含有疏水基团的烯属不饱和单体如甲基丙烯酸甲酯, 以及制造微胶囊的方法。

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