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    Process for increasing the solids content of latex
    1.
    发明公开
    Process for increasing the solids content of latex 失效
    一种用于增加胶乳的固体含量的方法

    公开(公告)号：EP0814094A1

    公开(公告)日：1997-12-29

    申请号：EP97109354

    申请日：1997-06-10

    申请人： GOODYEAR TIRE & RUBBER

    发明人： DUNN EDWIN REED ,  BURROWAY GARY LEE

    IPC分类号： C08K5/098 ,  C08C1/00 ,  C08C1/065 ,  C08C1/075 ,  C08F6/20 ,  C08F20/42 ,  C08L9/04 ,  C08L33/18

    CPC分类号： C08C1/075 ,  C08C1/065

    摘要： By utilizing the process of this invention, nitrile rubber latices having solids contents of greater than 60 percent can be prepared from standard nitrile rubber latices having solids contents of less than 30 percent. The present invention more specifically discloses a process for increasing the solids content of a low solids nitrile rubber latex which comprises the steps of (1) concentrating the low solids nitrile rubber latex by removal of water therefrom to produce an intermediate solids nitrile rubber latex having a solids content which is within the range of about 35 percent to about 45 percent, wherein the low solids nitrile rubber latex has a solids content which is less than about 30 percent; (2) subjecting the intermediate solids nitrile rubber latex to a pressure which is within the range of about 3.45 x 10
    6 Pa to about 6.9 x 10
    7 Pa at a temperature which is within the range of about 120°F to about 170°F to produce a pressure agglomerated nitrile rubber latex; and (3) further concentrating the pressure agglomerated nitrile rubber latex by removal of water therefrom to produce a high solids nitrile rubber latex having a solids content of greater than about 60 percent.

    Particulate polymer and preparation process thereof
    2.
    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.

    Verfahren zur Herstellung von Polymerdispersionsschäumen
    4.
    发明公开
    Verfahren zur Herstellung von Polymerdispersionsschäumen 审中-公开
    Verfahren zur Herstellung vonPolymerdispersionsschäumen

    公开(公告)号：EP0926160A1

    公开(公告)日：1999-06-30

    申请号：EP98124347.0

    申请日：1998-12-21

    申请人： BASF AKTIENGESELLSCHAFT

    发明人： Balk, Roelof ,  Graalmann, Onno ,  Kolman, Frank

    IPC分类号： C08C1/065 ,  C08J9/30

    CPC分类号： C08C1/065

    摘要： Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Polymerdispersionsschäumen L, wobei man:

    a) eine Mischung M, die mindestens ein konjugiertes Dienmonomer A und mindestens ein ethylenisch ungesättigtes Comonomer B umfasst, durch radikalische wässrige Emulsionspolymerisation in Gegenwart wenigstens eines Emulgators zu einer feinteiligen Polymerdispersion P polymerisiert,
    b) die feinteilige Polymerdispersion P zu einer grobteiligen Polymerdispersion G druckagglomeriert,
    c) die Polymerdispersion G gegebenenfalls aufkonzentriert und gegebenenfalls mit einer Verstärkerdispersion H mischt,
    d) die Dispersion aus c) zu einem Polymerdispersionsschaum L schäumt,
    das dadurch gekennzeichnet ist, dass die mittlere Teilchengröße und die Teilchengrößenverteilung von G durch Variation eines Parameters, ausgewählt unter:

    I) dem Feststoffgehalt von P,
    II) der Agglomerationstemperatur in Schritt b),
    III) dem Agglomerationsdruck in Schritt b),
    IV) dem Gehalt an Comonomer B in der Mischung M,
    V) der Konzentration des Emulgators in P,
    VI) dem Durchsatz bei der Agglomeration,
    eingestellt wird, nach diesem Verfahren erhältliche Polymerdispersionsschäume und deren Verwendung.

    摘要翻译： 在通过二烯和烯烃的乳液共聚制备分散泡沫体时，通过改变细分散体的固体含量，附聚条件，烯烃共聚单体含量，乳化剂浓度和/或附聚来调节最终粗分散体的平均粒径和分布 吞吐量。 制备聚合物分散体泡沫体（L）的方法包括：（a）在乳化剂存在下，共轭二烯单体（A）和烯属共聚单体（B）的混合物（M）的自由基乳液聚合（ 形成精细分散的聚合物分散体（P），（b）（P）到粗分散体（G）的压力聚集，（c）任选的（G）浓度和任选与增强分散体的混合，和（d ）膨胀以产生泡沫（L）。 （G）的平均粒度和粒度分布通过变化来调节; （1）（b）中的（P）的固体含量，（2）凝聚温度，（3）（b）中的附聚压力，（4）混合物（M）中共聚单体（B）的含量， （5）乳化剂在（P）中的浓度和/或（6）聚集中的生产量。 还包括：（1）通过该方法获得的聚合物分散体（G）（任选地与树脂分散体H浓缩或混合）; （2）通过该方法获得的聚合物分散体泡沫（L）。

    Process for agglomerating a polymer latex
    10.
    发明公开
    Process for agglomerating a polymer latex 失效
    聚合物聚合物聚合物

    公开(公告)号：EP0271684A2

    公开(公告)日：1988-06-22

    申请号：EP87115951.3

    申请日：1987-10-30

    申请人： Ube Cycon, Ltd.

    发明人： Goto, Hideo, c/o Ube Cycon Ltd.

    IPC分类号： C08C1/065 ,  C08F6/18

    CPC分类号： C08C1/065 ,  B01J19/2415 ,  B01J19/26 ,  B01J2219/00177 ,  B01J2219/00184 ,  C08F6/18

    摘要： A process for agglomerating a polymer latex according to, which process a polymer latex having a large particle size and a uniform particle size distribution can be produced without forming any coagulum, with a large effect of enlarging the particle size and in a short time is provided, which process is directed to a process for agglomerating polymer latex particles by adding an acid to a polymer latex of a small particle size (A) obtained by emulsion polymerization using an emulsifying agent which is reduced in the surface activity in an acetic state, and characterized by carrying out at least one of the following operations (i) to (iv):

    (i) an operation of continuously feeding the latex (A) and an acid into a flow type tubular apparatus;
    (ii) an operation of adding to the latex (A), an emulsifying agent of a good surface activity in an acidic state in advance, followed by continuously feeding the resulting latex and an acid into a flow type tubular apparatus;
    (iii) an operation of adding to the latex (A), a polymer-­agglomerating agent having both a polar group and a non-polar group in one molecule in 0.0001 to 0.5 part based on 100 parts of solids of the polymer latex in advance, followed by adding an acid so as to lower the pH of the resulting latex down to 6 or less; and
    (iv) an operation of adding to the latex (A), an emulsifying agent of a good surface activity in an acidic state in advance; then adding an acid in excess to the resulting latex to prepare a latex having a lower concentration than that of the latex (A); thereafter mixing the resulting latex with the latex (A); and keeping the mixed latex at a pH of 6 or less.

    摘要翻译： 可以制造聚合物胶乳的方法，该方法可以制备具有大粒径和均匀粒度分布的聚合物胶乳，而不形成任何凝结物，具有扩大粒径的大的效果，并且在短时间内提供 该方法涉及一种通过向通过乳液聚合获得的小粒径（A）的聚合物胶乳中加入酸而使聚合物胶乳颗粒凝聚的方法，该乳化聚合物乳胶在乙酸状态下的表面活性降低， 其特征在于进行以下操作（i）至（iv）中的至少一个：（i）将胶乳（A）和酸连续进料到流动式管状装置中的操作; （ii）预先在酸性状态下向胶乳（A）中添加具有良好表面活性的乳化剂，然后将所得胶乳和酸连续供给到流动型管状装置中的操作; （iii）相对于100份固体聚合物胶乳预先在一分子内添加0.0001〜0.5份的具有极性基团和非极性基团的聚合物凝聚剂的乳液（A）的操作， ，然后加入酸以使所得胶乳的pH降低至6以下; 和（iv）预先在酸性状态下添加具有良好表面活性的乳化剂的胶乳（A）的操作; 然后向所得胶乳中加入过量的酸以制备具有比胶乳（A）低的浓度的胶乳; 然后将所得胶乳与胶乳（A）混合; 并将混合胶乳保持在6以下的pH。 H