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    High solids aqueous silica slurry
    13.
    发明授权
    High solids aqueous silica slurry 失效
    高固体含水二氧化硅浆液

    公开(公告)号：US5030286A

    公开(公告)日：1991-07-09

    申请号：US396402

    申请日：1989-08-14

    申请人： Roger A. Crawford ,  Thomas G. Krivak ,  Patrick G. Malloy ,  Da-Hung Yang

    发明人： Roger A. Crawford ,  Thomas G. Krivak ,  Patrick G. Malloy ,  Da-Hung Yang

    IPC分类号： C01B33/14 ,  C01B33/141 ,  C01B33/187 ,  C08K3/36 ,  C08L33/04 ,  C08L33/06 ,  D21H19/40

    CPC分类号： C01B33/1417 ,  D21H19/40 ,  Y10S423/15

    摘要： Described are high solids aqueous slurries of amorphous precipitated hydrated silica, which slurries are of relatively low viscosity. The slurry typically contains from about 40 to about 60 weight percent of hydrated precipitated high structure silica. The viscosity of the high solids slurry is less than about 1000 centipoises. Processes for producing the aqueous high solids silica slurry are disclosed. In one embodiment, a wet cake of amorphous precipitated hydrated silica is liquified and the liquified wet cake charged to a high intensity mill wherein the silica is wet milled until the median agglomerate particle size of the silica is between about 0.3 and about 3 microns. In a further embodiment, finely-divided dry amorphous precipitated silica is slurried in a dispersion mill to the desired solids level and this slurry charged to a high-intensity mill and wet milled therein until the aforesaid agglomerate particle size range is attained. The resulting high solids slurry can be shipped in bulk with only mild agitation to prevent setting. A dispersant may also be added to the slurry prior to milling to retard settling of the silica.

    摘要翻译： 描述了无定形沉淀的水合二氧化硅的高固体含水浆料，其中浆料的粘度相对较低。 浆料通常含有约40至约60重量％的水合沉淀高结构二氧化硅。 高固体浆料的粘度小于约1000厘泊。 公开了用于生产含水高固体二氧化硅浆料的方法。 在一个实施方案中，将无定形沉淀的水合二氧化硅的湿滤饼液化并将液化的湿滤饼装入高强度研磨机中，其中二氧化硅被湿磨，直到二氧化硅的中值附聚物粒度在约0.3至约3微米之间。 在另一个实施方案中，将细碎的干无定形沉淀二氧化硅在分散研磨机中浆化至所需的固体含量，并将该浆料装入高强度研磨机中并在其中湿磨，直到达到上述附聚物粒度范围。 所得到的高固体浆料可以散装运输，只需轻微的搅拌即可防止固化。 在研磨之前还可以将分散剂加入到浆料中以阻止二氧化硅沉降。

    Tire tread composition comprising highly reinforcing reinforced amorphous precipitated silica
    16.
    发明授权
    Tire tread composition comprising highly reinforcing reinforced amorphous precipitated silica 失效
    轮胎胎面组合物包含高度增强的非晶态沉淀二氧化硅

    公开(公告)号：US5605950A

    公开(公告)日：1997-02-25

    申请号：US531680

    申请日：1995-09-21

    申请人： Larry R. Evans ,  Walter H. Waddell ,  Thomas G. Krivak

    发明人： Larry R. Evans ,  Walter H. Waddell ,  Thomas G. Krivak

    IPC分类号： B60C1/00 ,  C08K3/00

    CPC分类号： B60C1/0016

    摘要： Cured tread rubber compositions of tires contain cured organic rubber, from 0 to 20 phr of reinforcing carbon black, and from 40 to 120 phr of reinforcing reinforced amorphous precipitated silica wherein the silica has a surface area of from 160 to 340 m.sup.2 /g and a pore diameter at the maximum of the volume pore size distribution function of from 5 to 19 nm. The presence of such reinforcing silica provides improved tire performance characteristics, especially improved paved highway performance, to tires having treads of the cured tread rubber compositions.

    摘要翻译： 轮胎的固化胎面橡胶组合物包含固化的有机橡胶，0至20phr的增强炭黑，以及40至120phr的增强的无定形沉淀二氧化硅，其中二氧化硅的表面积为160至340m2 / g， 孔径在最大的体积孔径分布函数为5至19nm。 这种增强二氧化硅的存在为具有固化的胎面橡胶组合物的胎面的轮胎提供改进的轮胎性能特性，特别是改进的铺路公路性能。

    Preparation of amorphous, precipitated silica and siliceous filler-reinforced microporous polymeric separator
    17.
    发明授权
    Preparation of amorphous, precipitated silica and siliceous filler-reinforced microporous polymeric separator 失效
    无定形沉淀二氧化硅和硅质填料增强微孔聚合物分离器的制备

    公开(公告)号：US4681750A

    公开(公告)日：1987-07-21

    申请号：US853506

    申请日：1986-04-18

    申请人： Harlan B. Johnson ,  Thomas G. Krivak ,  David A. Longhini

    发明人： Harlan B. Johnson ,  Thomas G. Krivak ,  David A. Longhini

    IPC分类号： C01B33/193 ,  H01M2/16 ,  H01M2/14 ,  C01B33/12

    CPC分类号： C01B33/193 ,  H01M2/1653 ,  C01P2002/02 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/82

    摘要： Precipitated amorphous silica useful for manufacturing microporous battery separators is prepared by establishing an aqueous solution of alkali metal silicate having an alkali metal oxide concentration of (a) from 2.1-2.6 grams per liter and a temperature of from about 179.degree. F. to 186.degree. F., or (b) from 5.6 to 7.2 grams per liter and a temperature of from 190.degree. to 198.degree. F.; adding from (a) 14.5 to 19 times or (b) 2 to 5 times respectively the amount of alkali metal silicate initially present in the initial aqueous solution simultaneously with acidifying agent, e.g., sulfuric acid, to the initial aqueous solution while maintaining the initial alkali metal oxide concentration therein substantially constant; reducing the pH of the resulting slurry to from 8 to 9; ageing the slurry at precipitation temperatures for from 15 to 90 minutes; reducing the pH of the aged slurry to from 3.8 to 4.7 and then recovering, e.g., separating, the silica from its entraining slurry, washing the recovered silica, and drying the washed precipitated silica. Optionally, the recovered and dried silica is milled after drying to produce a product having a median agglomerate particle size of from 6 to 15 micrometers.

    摘要翻译： 用于制造微孔电池隔板的沉淀的无定形二氧化硅是通过建立碱金属硅酸盐水溶液制备的，其碱金属氧化物浓度为（a）为2.1-2.6克/升，温度为约179-至186℃。 F.或（b）5.6〜7.2克/升，温度为190〜198℃。 从初始水溶液中初始存在的碱金属硅酸盐的量（例如硫酸）分别为（a）14.5〜19次或（b）2〜5次，同时保持初始水溶液的初始水溶液 碱金属氧化物浓度基本上恒定; 将所得浆料的pH降至8至9; 在沉淀温度下将浆料老化15至90分钟; 将老化浆料的pH降低至3.8至4.7，然后从其夹带浆料中回收，例如分离二氧化硅，洗涤回收的二氧化硅，并干燥洗涤过的沉淀二氧化硅。 任选地，将干燥后的二氧化硅经干燥后研磨，得到中值附聚物粒径为6〜15微米的产物。

    Precipitated silica pigment for silicone rubber
    18.
    发明授权
    Precipitated silica pigment for silicone rubber 失效
    硅橡胶沉淀二氧化硅颜料

    公开(公告)号：US4463108A

    公开(公告)日：1984-07-31

    申请号：US407183

    申请日：1982-08-11

    申请人： Melvin P. Wagner ,  Joseph P. Tultz ,  Thomas G. Krivak

    发明人： Melvin P. Wagner ,  Joseph P. Tultz ,  Thomas G. Krivak

    IPC分类号： C08K9/02 ,  C09C1/30 ,  C09C1/28

    CPC分类号： B82Y30/00 ,  C08K9/02 ,  C09C1/3054 ,  C01P2002/02 ,  C01P2004/64 ,  C01P2004/80 ,  C01P2006/12 ,  C01P2006/80

    摘要： Amorphous precipitated high structure silica pigment useful in the reinforcement of silicone rubber is described. The silica pigment is treated with an aqueous solution of a metal, e.g., calcium and barium, which forms a relatively water insoluble, white or colorless sulfate salt in amounts sufficient to provide at least an equal molar amount of the metal compared to the amount of alkali metal in the silica. Silicone rubber reinforced with such silica pigment exhibits a water swell of less than 4 volume percent.

    摘要翻译： 描述了可用于增强硅橡胶的无定形沉淀高结构二氧化硅颜料。 二氧化硅颜料用金属水溶液（例如钙和钡）处理，其形成相对不溶于水的白色或无色硫酸盐，其量足以提供至少等摩尔量的金属，与 二氧化硅中的碱金属。 用这种二氧化硅颜料增强的硅橡胶的水膨胀小于4体积％。

    Tire tread composition comprising highly reinforcing reinforced amorphous precipitated silica
    19.
    发明授权
    Tire tread composition comprising highly reinforcing reinforced amorphous precipitated silica 失效
    轮胎胎面组合物包含高度增强的非晶态沉淀二氧化硅

    公开(公告)号：US5610221A

    公开(公告)日：1997-03-11

    申请号：US533808

    申请日：1995-09-26

    申请人： Walter H. Waddell ,  Larry R. Evans ,  Thomas G. Krivak

    发明人： Walter H. Waddell ,  Larry R. Evans ,  Thomas G. Krivak

    IPC分类号： C08K3/36 ,  C08K3/00

    CPC分类号： C08K3/36

    摘要： Cured tread rubber compositions of tires contain cured organic rubber, from 40 to 150 phr of reinforcing carbon black, and reinforcing reinforced amorphous precipitated silica wherein the silica has a surface area of from 160 to 340 m.sup.2 /g and a pore diameter at the maximum of the volume pore size distribution function of from 5 to 19 nm. The presence of such reinforcing silica provides improved tire performance characteristics, especially improved paved highway performance, to tires having treads of the cured tread rubber compositions.

    摘要翻译： 轮胎的固化胎面橡胶组合物包含固化的有机橡胶，40至150phr的增强炭黑，以及增强的无定形沉淀二氧化硅，其中二氧化硅的表面积为160至340m 2 / g，孔径最大为 体积孔径分布函数为5〜19nm。 这种增强二氧化硅的存在为具有固化的胎面橡胶组合物的胎面的轮胎提供改进的轮胎性能特性，特别是改进的铺路公路性能。