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12 条记录 (耗时 0.027 秒)

    Process for the preparation of aqueous dispersions of organic material and possible further conversion to a polymer dispersion when the organic material is a polymerizable monomer
    8.
    发明授权
    Process for the preparation of aqueous dispersions of organic material and possible further conversion to a polymer dispersion when the organic material is a polymerizable monomer 失效
    用于制备有机材料的水性分散体的方法，并且当有机材料是可聚合单体时可能进一步转化为聚合物分散体

    公开(公告)号：US4530956A

    公开(公告)日：1985-07-23

    申请号：US509464

    申请日：1983-06-07

    申请人： John Ugelstad ,  Arvid Berge

    发明人： John Ugelstad ,  Arvid Berge

    IPC分类号： C08F2/00 ,  C08F2/16 ,  C08F2/18 ,  C08F2/22 ,  C08F257/02 ,  C08F291/00 ,  C08J3/03

    CPC分类号： C08F257/02 ,  C08F2/22 ,  C08F291/00

    摘要： Process for preparing aqueous dispersions of a somewhat water-soluble low-molecular organic material, in which swellable particles prepared in a first step are swelled with the organic material in the second step. When the organic material is a polymerizable monomer the dispersion prepared is converted to a polymer dispersion. In the first step swellable oligomer or oligomer-polymer particles are prepared by(a) dispersing an aqueous mixture containing an oil-soluble initiator or a solution of an oil soluble initiator in an organic solvent, and then swelling the dispersed initiator-containing droplets with monomer and effecting polymerization, or(b) swelling polymer particles in aqueous dispersion with vinyl monomer and an oil-soluble initiator and effecting polymerization, the ratio between initiator and monomer used being so high that in the polymerization an oligomer having a degree of polymerization of 5-200 is formed. In the second step, optionally after dilution with water and addition of emulsifier, the organic material is added which has a solubility in water of >10, preferably >100 times higher than that of the oligomer and which diffuses through the aqueous phase and swells the oligomer or oligomer-polymer particles in a ratio by volume of >20:1. When the organic material is a polymerizable monomer, initiator is also added in the second step, and polymerization is effected.

    摘要翻译： PCT No.PCT / NO82 / 00052 Sec。 371日期：1983年6月7日 102（e）日期1983年6月7日PCT提交1982年10月19日PCT公布。 公开号WO83 / 01453 日期：1983年4月28日。用于制备稍微水溶性低分子有机材料的水性分散体的方法，其中第一步中制备的可溶胀颗粒在第二步中用有机材料溶胀。 当有机材料是可聚合单体时，将制备的分散体转化为聚合物分散体。 在第一步骤中，通过以下步骤制备可溶胀低聚物或低聚物聚合物颗粒：（a）将含有油溶性引发剂或油溶性引发剂的溶液的含水混合物分散在有机溶剂中，然后用分散的含引发剂的液滴 单体和有效聚合反应，或（b）用乙烯基单体和油溶性引发剂溶解含水分散体中的聚合物颗粒并进行聚合，使用的引发剂和单体之间的比例如此之高，使得在聚合反应中，具有聚合度 形成5-200。 在第二步中，任选地在用水稀释并加入乳化剂之后，添加有机材料，其在水中的溶解度>低于低聚物的> 10倍，优选> 100倍，并且扩散通过水相并溶胀 低聚物或低聚物聚合物颗粒，其体积比> 20:1。 当有机材料是可聚合单体时，在第二步中也加入引发剂，进行聚合。

    Two-stage seed swelling procedure for producing monodisperse PVC particles
    9.
    发明授权
    Two-stage seed swelling procedure for producing monodisperse PVC particles 失效
    用于生产单分散PVC颗粒的两阶段种子溶胀程序

    公开(公告)号：US06228925B1

    公开(公告)日：2001-05-08

    申请号：US09171672

    申请日：1999-02-09

    申请人： Steinar Pedersen ,  Arvid Berge ,  Harald Jacobsen ,  Kari-Anne Leth-Olsen ,  Bård Sæthre ,  John Ugelstad

    发明人： Steinar Pedersen ,  Arvid Berge ,  Harald Jacobsen ,  Kari-Anne Leth-Olsen ,  Bård Sæthre ,  John Ugelstad

    IPC分类号： C08F1406

    CPC分类号： C08F14/06 ,  C08F285/00 ,  Y10S526/909 ,  C08F2/20 ,  C08F214/06

    摘要： A procedure for the production of PVC particles with a narrow size distribution in the range 10-50 &mgr;m, preferably 10-30 &mgr;m, in which, in a first stage, a vinyl monomer or a mixture of monomers is polymerised to form a polymer/oligomer seed particle in the range 1-10 &mgr;m. In a second stage, another vinyl monomer or mixture of monomers is swelled into the polymer/oligomer seed particles and polymerisation takes place in such a way that they grow into polymer particles of the desired size. It is preferable to use aromatic vinyl monomers or acrylates as the monomer in the seed particles. The seed particles in the first stage can be produced in a two-stage swelling process or by dispersion polymerisation.

    摘要翻译： 制备具有10-50μm，优选10-30μm的窄尺寸分布的PVC颗粒的方法，其中在第一阶段中乙烯基单体或单体混合物聚合形成聚合物/ 寡聚种子颗粒在1-10毫米范围内。 在第二阶段中，另一种乙烯基单体或单体混合物溶胀到聚合物/低聚物种子颗粒中，聚合以这样的方式进行，使得它们生长成所需尺寸的聚合物颗粒。 优选在种子颗粒中使用芳族乙烯基单体或丙烯酸酯作为单体。 第一阶段中的种子颗粒可以在两阶段溶胀过程中或通过分散聚合制备。

    Process for preparing magnetic polymer particles
    10.
    发明授权
    Process for preparing magnetic polymer particles 失效
    制备磁性聚合物颗粒的方法

    公开(公告)号：US4774265A

    公开(公告)日：1988-09-27

    申请号：US890221

    申请日：1986-07-29

    申请人： John Ugelstad ,  Turid Ellingsen ,  Arvid Berge ,  Oskar B. Helgee

    发明人： John Ugelstad ,  Turid Ellingsen ,  Arvid Berge ,  Oskar B. Helgee

    IPC分类号： H01G2/00 ,  B03C1/01 ,  G01N33/543 ,  H01F1/10 ,  H01F1/11 ,  H01F1/42 ,  H01G4/38 ,  H01G9/08 ,  H01L31/02 ,  H01L31/04 ,  H01L31/042 ,  H01M2/20 ,  H01M2/22 ,  H01M2/26 ,  H01M2/30 ,  H01M6/42 ,  H02N11/00 ,  C08J9/22 ,  C08K3/10

    CPC分类号： H01F1/42 ,  B03C1/01 ,  G01N33/5434 ,  H01F1/111 ,  G01N2446/10 ,  Y10S428/90 ,  Y10T428/2998

    摘要： Magnetic polymer particles prepared by treating compact or porous polymer particles with a solution of iron salts and, if desired, salts of other metals which are capable of forming magnetic ferrites, in which the solution swells or penetrates into the particles. Iron hydroxide and possible other metal hydroxides are precipitated, for instance by raising the pH value, and the particles are optionally heated. In the iron salts used the ratio between di- and trivalent iron is suitably such that magnetic iron oxide is formed directly. It is also possible to use oxidizing or reducing groups or additives to obtain such a ratio. When other metal salts are used in addition to iron salts, the operation is carried out in the same manner. For instance, when Mn.sup.++, Co.sup.++ or Ni.sup.++ salts are used in addition to Fe.sup.++ salts, the divalent iron is oxidized to trivalent so that magnetic ferrite is obtained. The polymer particles which are treated with metal salts preferably contain metal-binding groups. Such groups are incorporated for instance by using monomers which contain said groups for the preparation of the polymer particles, or the groups are incorporated in the polymer particles prepared.The magnetic polymer particles are spherical and have a uniform concentration of magnetic material. They may be used for medical, diagnostic or other purposes.

    摘要翻译： 通过用铁盐溶液处理紧密或多孔的聚合物颗粒制备的磁性聚合物颗粒，以及如果需要，能够形成磁性铁氧体的其它金属的盐，其中溶液溶胀或渗入颗粒中。 例如通过提高pH值来沉淀氢氧化铁和可能的其它金属氢氧化物，任选地加热颗粒。 在使用的铁盐中，二价和三价铁之间的比例适当地使得直接形成磁性氧化铁。 也可以使用氧化或还原基团或添加剂来获得这种比例。 除了铁盐之外，当使用其它金属盐时，以相同的方式进行操作。 例如，除了Fe ++盐之外，当使用Mn ++，Co ++或Ni ++盐时，二价铁被氧化成三价，从而得到磁性铁氧体。 用金属盐处理的聚合物颗粒优选含有金属结合基团。 这样的基团例如通过使用含有所述基团的单体来制备聚合物颗粒，或将这些基团引入所制备的聚合物颗粒中。 磁性聚合物颗粒是球形的并且具有均匀的磁性材料浓度。 它们可用于医疗，诊断或其他目的。