Method of preparing diene latex having a large particle size by addition of a pretreated seed latex to an agglomerating agent
    32.
    发明授权
    Method of preparing diene latex having a large particle size by addition of a pretreated seed latex to an agglomerating agent 有权
    通过将预处理的种子胶乳添加到附聚剂来制备具有大粒径的二烯胶乳的方法

    公开(公告)号:US06777483B2

    公开(公告)日:2004-08-17

    申请号:US10213223

    申请日:2002-08-06

    CPC classification number: C08J3/03

    Abstract: A method of preparing a diene rubber latex having large size particles, good stability and reduced coagulum during polymerization wherein the method comprises: (a) pretreating a seed diene rubber latex with an anionic emulsifier and a non-ionic emulsifier, (b) adjusting the pH of an unsaturated carboxylic acid-containing copolymer latex to about 5 to 11 and adjusting the solids content of the copolymer latex to about 1 to 10% by weight solids content to produce an agglomerating latex solution, and (c) adding the pretreated seed diene rubber latex of step (a) to the agglomerating latex solution of step (b). Step (c) must be carried out by adding the pretreated seed diene rubber latex to the agglomerating latex. If the agglomerating latex is added to the rubber latex, an undesirable level of coagulum is produced.

    Abstract translation: 一种制备具有大粒径的二烯橡胶胶乳的方法,在聚合过程中具有良好的稳定性和降低的凝结物,其中该方法包括:(a)用阴离子乳化剂和非离子乳化剂预处理种子二烯橡胶胶乳,(b) 将不饱和羧酸的共聚物胶乳的pH调节至约5至11,并将共聚物胶乳的固体含量调节至约1至10重量%的固体含量以产生凝聚胶乳溶液,和(c)将预处理的种子二烯 步骤(a)的橡胶胶乳到步骤(b)的凝聚胶乳溶液。步骤(c)必须通过将预处理的种子二烯橡胶胶乳添加到附聚胶乳中来进行。 如果将聚结胶乳加入到橡胶胶乳中,则产生不期望的水平的凝结物。

    Method for preparing polybutadiene latex
    33.
    发明授权
    Method for preparing polybutadiene latex 有权
    制备聚丁二烯胶乳的方法

    公开(公告)号:US06365669B1

    公开(公告)日:2002-04-02

    申请号:US09177840

    申请日:1998-10-22

    CPC classification number: C08F265/04 C08C1/07 C08F136/06 C08F2/26

    Abstract: A method for preparing a polybutadiene latex comprises providing an emulsion polymerization medium by reacting a mixture of water, butadiene monomers, a surfactant, a chain transfer agent, an initiator and an electrolyte, preferably at a temperature of about 60˜80° C., preferably for about 8˜16 hours, and agglomerating the resulting emulsion polymerization medium, preferably at a temperature of about 5˜20° C. higher than the polymerization temperature, preferably for about 4˜12 hours by adding a surfactant and an agglomerating agent to the emulsion polymerization medium in consecutive order. The agglomerating agent is prepared a method comprising a first step of forming agglomerating seeds by batch polymerization of an alkyl acrylate of C1˜C12, an anionic surfactant and an anionic initiator, a second step of growing the agglomerating agent in semi-batch polymerization by adding an alkyl acrylate of C1˜C12 and anionic comonomer to the resulting polymer of the first step, and a third step of copolymerizing the ionic comonomer at the surface of the agglomerating agent to be prepared in a sufficient amount, by adding an alkyl acrylate of C1˜C12, an ionic comonomer and an anionic initiator to the resulting polymer of the second step.

    Abstract translation: 制备聚丁二烯胶乳的方法包括通过使水,丁二烯单体,表面活性剂,链转移剂,引发剂和电解质的混合物,优选在约60〜80℃的温度下反应来提供乳液聚合介质, 优选约8〜16小时,并将所得乳液聚合介质,优选在比聚合温度高约5〜20℃的温度下聚集,优选加入表面活性剂和附聚剂至约4〜12小时 乳液聚合介质连续顺序。 附聚剂的制备方法包括:通过间歇聚合C1〜C12烷基酯,阴离子表面活性剂和阴离子引发剂来形成团聚种子的第一步骤,第二步,通过加入在半间歇式聚合中生长附聚物 将C1〜C12的丙烯酸烷基酯和阴离子共聚单体与第一步所得的聚合物进行反应,第三步是通过加入C1的丙烯酸烷基酯共聚作用于附聚物表面的离子性共聚单体, 〜C12,离子共聚单体和阴离子引发剂,得到第二步的聚合物。

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