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    Latex processes
    71.
    发明授权
    Latex processes 失效
    乳胶工艺

    公开(公告)号：US5928830A

    公开(公告)日：1999-07-27

    申请号：US31345

    申请日：1998-02-26

    申请人： Chieh-Min Cheng ,  Grazyna E. Kmiecik-Lawrynowicz

    发明人： Chieh-Min Cheng ,  Grazyna E. Kmiecik-Lawrynowicz

    IPC分类号： G03G9/093 ,  G03G9/087

    CPC分类号： G03G9/09392 ,  G03G9/09321 ,  G03G9/09364

    摘要： 1. A process for the preparation of a latex comprising a core polymer and a shell thereover and wherein said core polymer is generated by (A)(i) emulsification and heating of the polymerization reagents of monomer, chain transfer agent, water, surfactant, and initiator;(ii) generating a seed latex by the aqueous emulsion polymerization of a mixture comprised of part of the (i) monomer emulsion, from about 0.5 to about 50 percent by weight, and a free radical initiator, and which polymerization is accomplished by heating, and, wherein the reaction of the free radical initiator and monomer produces a seed latex containing a polymer;(iii) heating and adding to the formed seed particles of (ii) the remaining monomer emulsion of (I), from about 50 to about 99.5 percent by weight of monomer emulsion of (i) and free radical initiator;(iv) whereby there is provided said core polymer; and(B) forming a shell thereover said core generated polymer and which shell is generated by emulsion polymerization of a second monomer in the presence of the core polymer, which emulsion polymerization is accomplished by(i) emulsification and heating of the polymerization reagents of monomer, chain transfer agent, surfactant, and an initiator;(ii) adding a free radical initiator and heating;(iii) whereby there is provided said shell polymer.

    摘要翻译： 1.一种制备包含芯聚合物和其上的壳的胶乳的方法，其中所述芯聚合物通过（A）（i）乳化和加热单体，链转移剂，水，表面活性剂， 和引发剂; （ii）通过由（i）单体乳液的一部分（约0.5至约50重量％）和自由基引发剂组成的混合物的水乳液聚合产生种子胶乳，并且该聚合通过加热， 并且其中所述自由基引发剂和单体的反应产生含有聚合物的种子胶乳; （iii）加热并加入（ii）（I）的剩余单体乳液的形成的种子颗粒，约50至约99.5重量％的（i）的单体乳液和自由基引发剂; （iv）由此提供所述芯聚合物; 和（B）在所述芯产生的聚合物之上形成壳，并且在芯聚合物存在下通过第二单体的乳液聚合产生壳，该乳液聚合通过（i）乳化和加热单体的聚合试剂 链转移剂，表面活性剂和引发剂; （ii）加入自由基引发剂并加热; （iii）由此提供所述壳聚合物。

    Latex processes
    72.
    发明授权
    Latex processes 失效
    乳胶工艺

    公开(公告)号：US5567566A

    公开(公告)日：1996-10-22

    申请号：US605423

    申请日：1996-02-22

    申请人： Hadi K. Mahabadi ,  Grazyna E. Kmiecik-Lawrynowicz ,  T. Hwee Ng

    发明人： Hadi K. Mahabadi ,  Grazyna E. Kmiecik-Lawrynowicz ,  T. Hwee Ng

    IPC分类号： C08F2/24 ,  G03G9/08 ,  G03G9/087

    CPC分类号： G03G9/0806 ,  C08F2/24

    摘要： A process for the preparation of polymer latex particles comprising:(a) conducting a pre-reaction emulsification which comprises emulsification of the polymerization reagents of monomer, polar comonomer, water, surfactant, chain transfer agent, and initiator, and wherein said emulsification is accomplished at a low temperature of from about 3.degree. to about 35.degree. C.; and(b) accomplishing an emulsion polymerization, which comprises heating the emulsified mixture of (a) in a reactor at from about 25.degree. to about about 125.degree. C. and retaining the contents of the reactor for an effective time period at said temperature of from about 25.degree. to about about 12.degree. C., followed by cooling.

    摘要翻译： 一种制备聚合物胶乳颗粒的方法，包括：（a）进行预反应乳化，其包括乳化单体，极性共聚单体，水，表面活性剂，链转移剂和引发剂的聚合试剂，并且其中所述乳化完成 在约3℃至约35℃的低温下。 和（b）完成乳液聚合，其包括在约25℃至约125℃的反应器中加热（a）的乳化混合物，并将反应器的内容物在所述温度 约25℃至约12℃，然后冷却。