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    Preparation of insoluble polymer powders which are only slightly swellable
    1.
    发明授权
    Preparation of insoluble polymer powders which are only slightly swellable 失效
    只能轻微溶胀的不溶性聚合物粉末的制备

    公开(公告)号：US4658002A

    公开(公告)日：1987-04-14

    申请号：US777329

    申请日：1985-09-18

    申请人： Chung-Ji Tschang ,  Karlheinz Messmer ,  Walter Denzinger

    发明人： Chung-Ji Tschang ,  Karlheinz Messmer ,  Walter Denzinger

    IPC分类号： C08F218/00 ,  C08F2/12 ,  C08F2/36 ,  C08F2/44 ,  C08F20/00 ,  C08F20/52 ,  C08F26/00 ,  C08F26/10 ,  C08F218/02 ,  C08F218/04 ,  C08F220/00 ,  C08F220/04 ,  C08F220/06 ,  C08F220/10 ,  C08F220/56 ,  C08F226/02 ,  C08F226/10 ,  C08F2/34

    CPC分类号： C08F26/10

    摘要： Insoluble polymer powders which are only slightly swellable are prepared by polymerization of N-vinylpyrrolidone or a mixture of (a) an N-vinylcarboxamide, acrylamide, methacrylamide, acrylic acid, methacrylic acid, acrylates, methacrylates and/or a vinyl ester and (b) from 0.1 to 10% by weight, based on the total amount of monomers, of, as a crosslinking agent, a compound possessing two or more ethylenically unsaturated double bonds, in a powder bed in the presence of a heat-transfer medium and in the absence of oxygen and polymerization initiators, at from 90.degree. to 220.degree. C., the powder state being maintained, the reaction mass being circulated and the heat-transfer medium evaporated from the polymerization zone.The resulting polymers are used as adsorbents, as formulation assistants for crop protection agents or as ion exchangers.

    摘要翻译： 通过聚合N-乙烯基吡咯烷酮或（a）N-乙烯基甲酰胺，丙烯酰胺，甲基丙烯酰胺，丙烯酸，甲基丙烯酸，丙烯酸酯，甲基丙烯酸酯和/或乙烯基酯和（b）的混合物来制备仅稍微溶胀的不溶性聚合物粉末 ），基于作为交联剂的单体总量的0.1〜10重量％的具有两个以上烯键式不饱和双键的化合物，在传热介质存在下在粉末床中， 不存在氧和聚合引发剂，在90℃至220℃下保持粉末状态，使反应物质循环并且传热介质从聚合区蒸发。 所得聚合物用作作为作物保护剂的配方助剂或作为离子交换剂的吸附剂。

    Preparation of insoluble polymer powders which are only slightly swellable
    2.
    发明授权
    Preparation of insoluble polymer powders which are only slightly swellable 失效
    只能轻微溶胀的不溶性聚合物粉末的制备

    公开(公告)号：US4647637A

    公开(公告)日：1987-03-03

    申请号：US777327

    申请日：1985-09-18

    申请人： Chung-Ji Tschang ,  Karlheinz Messmer ,  Walter Denzinger

    发明人： Chung-Ji Tschang ,  Karlheinz Messmer ,  Walter Denzinger

    IPC分类号： C08F218/00 ,  C08F2/12 ,  C08F2/36 ,  C08F2/44 ,  C08F20/00 ,  C08F20/52 ,  C08F26/00 ,  C08F26/10 ,  C08F218/02 ,  C08F220/00 ,  C08F220/10 ,  C08F220/56 ,  C08F226/06 ,  C08F226/10 ,  C08F2/34

    CPC分类号： C08F226/10

    摘要： Insoluble polymer powders which are only slightly swellable and are based on N-vinylpyrrolidone are prepared by polymerization of N-vinylpyrrolidone or a mixture of this with copolymerizable monomers and from 0.1 to 10% by weight, based on the total amount of monomers, of a crosslinking agent in a powder bed in the presence of a heat-transfer medium, which is inert to the reactants, and in the absence of oxygen and polymerization initiators, at from 90.degree. to 220.degree. C., while maintaining the powder state, circulating the reaction mass and evaporating the heat-transfer medium from the polymerization zone. The resulting insoluble polymers which are only slightly swellable are used as adsorbents or formulation assistants for fertilizers and crop protection agents.

    摘要翻译： 通过N-乙烯基吡咯烷酮或其混合物与可共聚单体的聚合反应制备仅基于N-乙烯基吡咯烷酮轻微溶胀并且基于N-乙烯基吡咯烷酮的不溶性聚合物粉末，基于单体总量为0.1-10重量％ 交联剂在粉末床中，在对反应物呈惰性的热传递介质存在下，在不存在氧和聚合引发剂的情况下，在90℃至220℃下，同时保持粉末状态，循环 反应物质并从聚合区蒸发传热介质。 所得的不溶性聚合物只是稍微溶胀，被用作肥料和作物保护剂的吸附剂或制剂助剂。