Chemically modified silica fillers, process for producing, and silicone compositions containing same
    3.
    发明授权
    Chemically modified silica fillers, process for producing, and silicone compositions containing same 有权
    化学改性的二氧化硅填料,制备方法和含有它们的硅氧烷组合物

    公开(公告)号:US06384125B1

    公开(公告)日:2002-05-07

    申请号:US09637953

    申请日:2000-08-11

    IPC分类号: C08K334

    摘要: This invention is a process for making modified silica filler comprising the steps of: (A) contacting an acidic aqueous suspension of precipitated or colloidal silica, optionally in the presence of a surfactant and/or a water-miscible solvent, with a combination of (a) a functionalizing coupling agent, and (b) an organometallic hydrophobing compound in a weight ratio of (a) to (b) of at least 0.001 to 1 to form an acidic aqueous suspension of chemically treated silica filler having a pH of 2.0 or less (B) treating the acidic aqueous suspension of the chemically treated filler with an acid-neutralizing agent to increase the pH of the suspension to a range of from greater than 2.0 to 10, and (C) recovering the chemically treated filler. This invention is also modified silica filler that has a pH of from about 5.0 to 10.0, where the silica filler is made by the method of this invention. This invention is also a curable silicone elastomer composition comprising a polyorganosiloxane, the modified silica filler produced by the method of this invention, and a means of curing the polyorganosiloxane into an elastomer.

    摘要翻译: 本发明是一种制备改性二氧化硅填料的方法,其包括以下步骤:(A)任选在表面活性剂和/或水混溶性溶剂存在下,使沉淀或胶体二氧化硅的酸性水性悬浮液与( a)官能化偶联剂,和(b)重量比为(a)至(b)的有机金属疏水化合物为至少0.001至1,以形成pH为2.0的化学处理二氧化硅填料的酸性水性悬浮液,或 (B)用酸中和剂处理化学处理的填料的酸性水性悬浮液以将悬浮液的pH值提高到大于2.0-10的范围,和(C)回收化学处理的填料。本发明 也是pH为约5.0至10.0的改性二氧化硅填料,其中二氧化硅填料通过本发明的方法制备。 本发明还是一种可固化的硅氧烷弹性体组合物,其包含聚有机硅氧烷,通过本发明的方法制备的改性二氧化硅填料,以及将聚有机硅氧烷固化成弹性体的方法。

    DIATOMACEOUS EARTH PRODUCT
    8.
    发明申请
    DIATOMACEOUS EARTH PRODUCT 有权
    DIATOMACEOUS地球产品

    公开(公告)号:US20140371061A1

    公开(公告)日:2014-12-18

    申请号:US14234852

    申请日:2012-07-25

    申请人: Andrew Riley

    发明人: Andrew Riley

    摘要: A method of making a diatomaceous earth granulate may include spray-drying a suspension including particles of diatomaceous earth, a liquid medium, and a binder, wherein inorganic solids in the suspension include at least 80 wt % diatomaceous earth. The method may further include recovering a diatomaceous earth spray-dried granulate. A granular diatomaceous earth product obtained by the method may include substantially spherical granules, each having a shell including diatomaceous earth surrounding a hollow core. The product may be used as a filter aid or in filtration.

    摘要翻译: 制备硅藻土颗粒的方法可以包括喷雾干燥包括硅藻土,液体介质和粘合剂颗粒的悬浮液,其中悬浮液中的无机固体包含至少80重量%的硅藻土。 该方法还可以包括回收硅藻土喷雾干燥的颗粒。 通过该方法获得的颗粒状硅藻土产品可以包括基本上为球形的颗粒,每个颗粒具有包围中空芯的硅藻土的壳。 该产品可用作助滤剂或过滤。