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    • 105. 发明授权
    • Process for producing an oil and water adsorbent polymer capable of
entrapping solid particles and liquids and the product thereof
    • 能够捕获固体颗粒和液体的油和水吸附聚合物及其产物的方法
    • US6107429A
    • 2000-08-22
    • US954020
    • 1997-10-20
    • Milan F. Sojka
    • Milan F. Sojka
    • B01J20/26B01J20/30C08F2/00C08F2/06C08F2/18C08F20/04C08F20/10C08F220/28C08F220/40C08F222/10C09K3/32C09K8/12C09K8/88C08F220/20C08F218/02C08F220/10
    • C08F2/06B01J20/26B01J20/30C08F2/18C08F20/04C08F220/28C08F220/40C08F222/1006C09K3/32C09K8/12C09K8/887Y10T428/2998
    • The present invention is directed to a porous polymer microparticle, in the form of broken spheres, open to a porous oleophilic interior surface area, having a high oil and water absorbency and an apparent bulk density of about 0.008 to about 0.1 grams/cc. The preferred method of the present invention comprises the steps of:dissolving at least one, and preferably at least two, polyunsaturated monomers along with an effective amount of an organic polymerization initiator in a water-immiscible organic solvent to provide a monomer mixture;adding the monomer mixture to an aqueous solution, preferably having an effective amount of a suspension stabilizer dissolved therein, to form an organic/aqueous biphasic liquid system;vigorously agitating the biphasic liquid system at a rate sufficient to cause the water-immiscible organic phase to be suspended as microdroplets in the aqueous phase;continuing vigorous agitating during polymerization of the monomers in the suspended microdroplets to produce a microporous polymer microparticle; andseparating the microporous polymer microparticle from the organic solvent to produce a microporous and oil sorbent polymer microparticle having a mean unit diameter of less than about 50 microns and a total sorptive capacity for mineral oil that is at least about 72% by weight, preferably at least about 90% by weight dry polymer basis.
    • 本发明涉及破碎球形式的多孔聚合物微粒,其通向具有高的油和水吸收性以及约0.008至约0.1克/毫升的表观堆积密度的多孔亲油内表面区域。 本发明的优选方法包括以下步骤:将至少一种,优选至少两种多不饱和单体与有效量的有机聚合引发剂一起溶解在与水不混溶的有机溶剂中以提供单体混合物; 将单体混合物加入到水溶液中,优选具有有效量的溶解在其中的悬浮稳定剂,以形成有机/水相双相液体体系; 以足以使水不混溶的有机相作为微滴悬浮在水相中的速度大力搅拌两相液体体系; 在悬浮微滴中的单体聚合期间继续剧烈搅拌以产生微孔聚合物微粒; 并且将微孔聚合物微粒与有机溶剂分离以产生平均单位直径小于约50微米的微孔和油吸附剂聚合物微粒,并且矿物油的总吸附能力为至少约72重量%,优选为 至少约90%(重量)干基聚合物。
    • 110. 发明授权
    • Binder compositions for laser sintering processes
    • 用于激光烧结工艺的粘合剂组合物
    • US6048954A
    • 2000-04-11
    • US879688
    • 1997-06-24
    • Joel W. BarlowNeal K. Vail
    • Joel W. BarlowNeal K. Vail
    • B29C41/00B29C67/00C04B35/634C08F220/12C08F220/10
    • C08F220/12B29C41/003B29C67/0081C04B35/634C04B35/63424C04B35/63444B29K2503/04
    • The development of polymer binder compositions that provide novel binders for high temperature inorganic particulates, especially metal and ceramic particulates is described. These materials are especially useful in a laser beam sintering process known as SLS.TM. that forms accurately shaped high strength green objects. The new binders may be thermally removed in post-shaping operations without significant residual ash. The resulting structures contain only metal, ceramic, or metal ceramic materials. The inventive methods developed for producing the new polymeric binder materials are based in part on using emulsion forms of selected polymers at controlled low molecular weights and high melt flow. An important aspect of the process is the semi-batch addition of selected chain transfer agents to the reacting emulsion. This optimizes coating characteristics of the polymer binder and results in high part strengths of the prototype parts produced in the SLS.TM. process.
    • 描述了提供用于高温无机颗粒,特别是金属和陶瓷颗粒的新型粘合剂的聚合物粘合剂组合物的开发。 这些材料在形成精确成形的高强度绿色物体的称为SLS TM的激光束烧结工艺中特别有用。 新的粘合剂可以在后成型操作中热除去而没有显着的残余灰分。 所得结构仅包含金属,陶瓷或金属陶瓷材料。 开发用于生产新的聚合物粘合剂材料的本发明方法部分地基于在受控的低分子量和高熔体流动下使用所选聚合物的乳液形式。 该方法的一个重要方面是将选择的链转移剂半批量加入到反应乳液中。 这样可以优化聚合物粘合剂的涂层特性,并产生在SLS TM工艺中生产的原型零件的高部件强度。