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64 条记录 (耗时 0.016 秒)

    Particulate polymer and preparation process thereof
    11.
    发明公开
    Particulate polymer and preparation process thereof 失效
    聚合物颗粒及其制备方法。

    公开(公告)号：EP0215321A2

    公开(公告)日：1987-03-25

    申请号：EP86111519.4

    申请日：1986-08-20

    申请人： MITSUBISHI RAYON CO., LTD.

    发明人： Sugimori, Teruhiko ,  Suzuki, Fumio ,  Habara, Hideaki ,  Inada, Hiromasa

    IPC分类号： C08J3/12 ,  C08F6/18 ,  C08C1/065

    CPC分类号： C08C1/065 ,  C08F6/18 ,  C08J3/12 ,  C08J3/16 ,  C08J2321/02

    摘要： Disclosed herein is a particulate polymer prepared by the agglomeration of polymer particles contained in a polymer latex. The particulate polymer is composed of primary particles having particle sizes of at least 20 µm and/or secondary particles formed by the agglomeration of at least some of the primary particles and is in the form of a compact mass sub­stantially free of voids. The particulate polymer is prepared by coagulating the polymer latex in the presence of a coagulant and an organic liquid having low solubility in water. The particulate polymer has a high bulk specific gravity and contains few fine particles. It is thus easy to handle and allows the consumption of energy to be reduced in the drying step.

    WATER-ABSORBING RESIN PARTILCE AGGLOMERATES AND PROCESS FOR PRODUCITON THEREOF
    18.
    发明公开
    WATER-ABSORBING RESIN PARTILCE AGGLOMERATES AND PROCESS FOR PRODUCITON THEREOF 审中-公开
    用于生产吸水性树脂AND PROCESS的附聚物用于生产

    公开(公告)号：EP2006306A4

    公开(公告)日：2009-09-02

    申请号：EP06822789

    申请日：2006-11-01

    申请人： ASAHI KASEI CHEMICALS CORP

    发明人： HIGASHIMOTO NAONORI ,  KODAMA TAMOTSU ,  NISHI MASATAKA

    IPC分类号： C08F2/18 ,  A61L15/22 ,  C08F6/18 ,  C08F6/22 ,  C08F20/06 ,  C08J3/16

    CPC分类号： C08F2/18 ,  A61L15/24 ,  A61L15/42 ,  C08F6/18 ,  C08F220/06 ,  C08F222/385 ,  Y10T428/2982 ,  C08L33/02

    摘要： A process for the production of water-absorbing resin particle agglomerates by which water-absorbing resin particles having satisfactory high water-holding capacity and large diameters can be produced without using special material, which comprises the following steps (1) and (2): the polymerization step (1) of suspending an aqueous monomer solution containing a salt of an unsaturated carboxylic acid in an organic solvent in the presence of a nonionic surfactant and subjecting the resulting suspension to reversed phase suspension polymerization to form water-absorbing resin primary particles and the agglomeration step (2) of agglomerating the primary particles with a water -soluble solvent; and water-absorbing resin particle agglomerates stably exhibiting high water-holding capacity which satisfy the following requirements (a) and (b): (a) the water-absorbing resin constituting the primary particles is a polymer in which carboxyl-containing units account for at least 50% by mole of all the repeating units constituting the molecular chain and at least part of the carboxyl-containing units are neutralized with at least one base selected from among alkali metals, amines, and ammonia and (b) the water-absorbing resin particle agglomerate contains a portion having a degree of neutralization of carboxyl of 40% by mole or below on the outer surface of the agglomerate and a portion having a degree of neutralization of carboxyl of 50% by mole or above inside the agglomerate.