Absorbent polymer having reduced dusting tendencies
    4.
    发明授权
    Absorbent polymer having reduced dusting tendencies 失效
    具有降低粉尘倾向的吸收性聚合物

    公开(公告)号:US5994440A

    公开(公告)日:1999-11-30

    申请号:US501104

    申请日:1995-10-31

    摘要: The invention provides water-swellable polymer compositions having reduced dusting tendencies, i.e, reduced amounts of unassoiated dust having a maximum diameter less than or equal to 10 microns and/or the tendency to generate reduced amounts of unassociatcd dust having a maximum diameter less than or equal to 10 microns upon attrition, and a process for preparing such compositions.

    摘要翻译: PCT No.PCT / US93 / 02872。 371日期1995年10月31日 102(e)日期1995年10月31日PCT 1993年3月29日PCT公布。 出版物WO94 / 22940 日本公开1994年10月13日本发明提供了具有降低的粉尘倾向的水溶胀性聚合物组合物,即最小直径小于或等于10微米的未沉降粉尘的量减少和/或产生减少量的不相关粉尘的趋势,其具有 磨损时最大直径小于或等于10微米,以及制备这种组合物的方法。

    High vinylidene chloride content interpolymer coating resins and method
of preparation
    6.
    发明授权
    High vinylidene chloride content interpolymer coating resins and method of preparation 失效
    高偏二氯乙烯含量互聚物涂料树脂及其制备方法

    公开(公告)号:US4451632A

    公开(公告)日:1984-05-29

    申请号:US395442

    申请日:1982-07-06

    IPC分类号: C08F214/08 C08F14/08

    CPC分类号: C08F214/08

    摘要: A process for preparing, in aqueous emulsion, controlled interpolymer compositions. The interpolymer compositions have polymerized therein from about 86 to 92 mole percent, vinylidene chloride, from about 14 to 8 mole percent of a comonomer mixture of methyl methacrylate and a comonomer selected from the group consisting of acrylonitrile, methacrylic acid and methacrylonitrile in a ratio of the comonomer to methyl methacrylate of from about 0.5:1 to 2:1, and from about 0.5 to 1.0 weight percent itaconic acid, based on weight of vinylidene chloride plus comonomer mixture. The interpolymers are prepared in a three step process. The third step, or Step III, wherein monomer feeding is step-wise reduced for a portion of the step and a polymerization initiator is added at generally the same constant rate as the rate of addition in Steps I and II, generally reduces the amount of unreacted mixed monomers remaining after monomer addition is completed. As such, the detrimental results produced when a large amount of polymer composition variation in the direction of high vinylidene chloride fractions are markedly reduced.

    摘要翻译: 在水乳液中制备控制互聚物组合物的方法。 互聚物组合物在其中聚合约86至92摩尔%偏二氯乙烯,约14至8摩尔%的甲基丙烯酸甲酯和选自丙烯腈,甲基丙烯酸和甲基丙烯腈的共聚单体混合物的比例为 基于偏二氯乙烯加共聚单体混合物的重量,共聚单体为甲基丙烯酸甲酯的约0.5:1至2:1,以及约0.5至1.0重量%的衣康酸。 互聚物以三步法制备。 第三步骤或步骤III,其中步骤中单体进料逐步还原,并且聚合引发剂以与步骤I和II中的加入速率基本相同的恒定速率加入,通常减少 单体添加后剩余的未反应的混合单体完成。 因此,当高偏二氯乙烯部分的方向上的大量聚合物组合物变化显着降低时产生的有害结果。