Inorganic hydrogel flatting agents
    2.
    发明授权
    Inorganic hydrogel flatting agents 无效
    无机凝胶消光剂。

    公开(公告)号:EP0384226B1

    公开(公告)日:1994-07-27

    申请号:EP90102469.5

    申请日:1990-02-08

    IPC分类号: C09D7/12 C01B33/154

    摘要: An improved flatting agent comprising an inorganic hydrogel having a pore volume of at least 1.0 ml/g, an average particle size in the range 1 to 10 microns, and a particle size distribution such that when the flatting agent is dispersed in a coating, the fineness of grind is at least 4.75 on the Hegman scale. The inorganic hydrogel flatting agents of this invention are prepared by milling an inorganic hydrogel under controlled temperature conditions wherein a volatiles content of at least 40 weight percent is maintained, to produce inorganic hydrogel particles characterized by a pore volume of at least 1.0 ml/g, an average particle size in the range of 1 to 10 microns, and a particle size distribution such that when the flatting agent is dispersed in a coating, the fineness of grind is at least 4.75 on the Hegman scale. Also provided in accordance with this invention are improved coating compositions comprising a full gloss coating containing the above described flatting agents dispersed in the full gloss coating in from 3 to 15 weight percent loading on a solids basis.

    VERWENDUNG VON POLYACRYLSÄUREN ALS MAHLHILFSMITTEL FÜR CALCIUMCARBONAT
    4.
    发明公开
    VERWENDUNG VON POLYACRYLSÄUREN ALS MAHLHILFSMITTEL FÜR CALCIUMCARBONAT 审中-公开
    VERWENDUNG VONPOLYACRYLSÄURENALS MAHLHILFSMITTELFÜRCALCIUMCARBONAT

    公开(公告)号:EP1608594A1

    公开(公告)日:2005-12-28

    申请号:EP04717583.1

    申请日:2004-03-05

    IPC分类号: C01F11/18 B02C23/06 C08F20/06

    摘要: The invention relates to the use of polyacrylic acids which contain organic terminal groups containing sulphur, comprising at least two carbon atoms, having an average molecular weight Mw of 5 000 - 30 000 g/mol and which are at least partially neutralised by a base which is selected from the group of alkali hydroxides and ammonia as auxiliary agents for wet grinding of calcium carbonate. The invention also relates to fine particle aqueous suspensions of calcium carbonate which are produced by wet grinding of calcium carbonate in the presence of said polyacrylic acids.

    摘要翻译: 使用具有平均摩尔浓度的聚丙烯酸(I) 重量。 (M w)为5000-30000,并且含有硫和至少2个碳原子的端基,其被碱金属氢氧化物或氨至少部分中和,作为碳酸钙湿法研磨的辅助材料。 还包括独立权利要求,用于在(I)存在下通过湿式研磨获得的含有0.1-2重量%(I)的CaCO 3的细分悬浮液。

    Inorganic hydrogel flatting agents
    5.
    发明公开
    Inorganic hydrogel flatting agents 无效
    Anorganische Hydrogel-Mattierungsmittel。

    公开(公告)号:EP0384226A1

    公开(公告)日:1990-08-29

    申请号:EP90102469.5

    申请日:1990-02-08

    IPC分类号: C09D7/12 C01B33/154

    摘要: An improved flatting agent comprising an inorganic hydrogel having a pore volume of at least 1.0 ml/g, an average particle size in the range 1 to 10 microns, and a particle size distribution such that when the flatting agent is dispersed in a coating, the fineness of grind is at least 4.75 on the Hegman scale. The inorganic hydrogel flatting agents of this invention are prepared by milling an inorganic hydrogel under controlled temperature conditions wherein a volatiles content of at least 40 weight percent is maintained, to produce inorganic hydrogel particles characterized by a pore volume of at least 1.0 ml/g, an average particle size in the range of 1 to 10 microns, and a particle size distribution such that when the flatting agent is dispersed in a coating, the fineness of grind is at least 4.75 on the Hegman scale. Also provided in accordance with this invention are improved coating compositions comprising a full gloss coating containing the above described flatting agents dispersed in the full gloss coating in from 3 to 15 weight percent loading on a solids basis.

    摘要翻译: 一种改进的消光剂,其包含孔体积至少为1.0ml / g,平均粒径在1-10微米范围内的无机水凝胶,以及当平滑剂分散在涂层中时的粒度分布, 研磨的细度在Hegman量表上至少为4.75。 本发明的无机水凝胶糊化剂通过在其中保持至少40重量%的挥发物含量的控制温度条件下研磨无机水凝胶来制备,以产生特征在于至少1.0ml / g的孔体积的无机水凝胶颗粒, 平均粒径在1〜10微米的范围内,以及粒度分布使得当平滑剂分散在涂层中时,研磨细度在Hegman量级上至少为4.75。 根据本发明还提供了改进的涂料组合物,其包含以固体为基础以3至15重量%的载量分散在全光泽涂层中的上述平光剂的全光泽涂层。

    HIGH SOLIDS AQUEOUS SILICA SLURRY
    6.
    发明授权
    HIGH SOLIDS AQUEOUS SILICA SLURRY 失效
    高固含量水性二氧化硅悬浮液。

    公开(公告)号:EP0435936B1

    公开(公告)日:1995-10-18

    申请号:EP89911132.2

    申请日:1989-09-21

    IPC分类号: C01B33/141

    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 aqeuous 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 settling. A dispersant may also be added to the slurry prior to milling to retard settling of the silica.

    Molded catalyst and method of catalyst gas reaction
    7.
    发明公开
    Molded catalyst and method of catalyst gas reaction 失效
    成型体催化剂和催化气体反应。

    公开(公告)号:EP0230641A1

    公开(公告)日:1987-08-05

    申请号:EP86117890.3

    申请日:1986-12-22

    IPC分类号: B01J35/04

    摘要: A molded catalyst for fitting into a reactor vessel having an inlet and an outlet for a reactant gas, the catalyst having openings therethrough parallel to the direction of a reactant gas which is introduced into the reactor vessel from the inlet, the catalyst comprising: a wear-resistant front surface facing the inlet of the reactor vessel and a continuation of the front surface extending therefrom, the both being the front portion of the catalyst, and the remaining part of the catalyst made so wear-susceptible as to have either:

    (a) a wearability of 2-10 % in a shaking abrasion test wherein grinding particles having an average particle size of 1000 µm and a Mohs scale of 9 are placed in the openings of the catalyst in an amount of 50 % by volume based on the total volume of the openings, and the catalyst is shaked for three hours with an amplitude of 77 mm and a frequency of 320 per minute; or
    (b) a wearability of 7.5-35 % in an air abrasion test wherein an air which contains silica particles having an average particle size of 40 µm in amounts of 70 g/m³ is passed through in a reactor vessel including a rectangular parallele­pipedic catalyst of 45 mm wide, 45 mm thick and 100 mm long so fitted thereinto that the catalyst extends longitudinally in the direction of the flow of the air for 30 min. at a superficial velocity of 40 m/sec. at the front face of the catalyst.

    Verfahren und Vorrichtung zur Herstellung von keramischen Pulvern auf Basis von ein- und/oder mehrkomponentigen Metalloxiden sowie deren Gemischen
    8.
    发明公开
    Verfahren und Vorrichtung zur Herstellung von keramischen Pulvern auf Basis von ein- und/oder mehrkomponentigen Metalloxiden sowie deren Gemischen 失效
    的方法和装置,用于基于单 - 和/或多组分金属氧化物和它们的混合物的陶瓷粉末。

    公开(公告)号:EP0186042A2

    公开(公告)日:1986-07-02

    申请号:EP85115745.3

    申请日:1985-12-11

    IPC分类号: C01G1/02 C01G49/00

    CPC分类号: C04B35/626 Y10S423/15

    摘要: Konventionelle Vorsinter- und Reaktionssinterverfahren zur Herstellung keramischer Pulver liefern Produkte mit breit verteilter Teilchengröße sowie mitunter unkontrollierten Anhäufungen von Verunreinigungen, welche beim Fertigsintem zur Ausbildung von Duplexstrukturen. führen.
    Zwecks Fernhaltung oben genannter Materialeigenschaften an keramischen Pulvem, wird erfindungsgemäß ein Verfahren und ein Vorrichtung vorgestellt, welche die Heretellung von chemisch homogenen Pulvern mit eng gestreuter Teilchengrößenverteilung im Teilchengrößenbereich von 0,05 µm bis 10 µm ermöglicht.
    Zur Durchführung des Verfahres wird ein indirekt beheizter 6, in meherere Temperaturzonen (A, B, C) unterteilter, Fallrohrofen, weicher in Figur 3 dargestellt ist, eingesetzt.
    Die Rohstoffe, welche über eine hohe spezifische Oberfläche verfügen, werden in Form klassierter Granulate in den Fallrohrofen eingesetzt (1, 2, 3).
    Die eingesetzten Granulate werden rasch auf Temperatur gebracht und innerhalb von wenigen Sekunden, quasi im freien Fall, unter inerten, oxydierenden oder reduzierenden Bedingungen in keramische Pulver mit gewünschten Materialeigenschaften übergeführt. Nachgeschaltete Kühlsysteme (9, 10, 11) kühlen das Pulver (12) bis auf Raumtemperatur ab. Die Gaszuführung erfolgt über Rohrleitungen (8). Die gebildeten Reaktionsgase werden entweder über den Ofenkopf (4) oder über den Ofenboden (10) abgezogen.

    摘要翻译: 为了防止宽的颗粒尺寸分布和杂质的不受控制的浓度,其在最终烧结导致双工结构,过程和装置中描述了使具有在粒径的粒度分布窄的化学均匀性的陶瓷粉末的形成 要生产从00:05微米至10微米范围内。 ... 的方法是通过使用在间接加热溜子炉6所有这一切都被划分成温度带的多个(A,B,C),并示于图3 ... 原料进行,该 具有高的比表面积被插入到分类颗粒(1,2,3)的形式溜子炉。 ... 将颗粒插入快速加热至温度和在几秒钟内转换,自由下落的,因为它是在惰性,氧化或者还原条件成具有所期望的材料性能的陶瓷粉末。 下游冷却系统(9,10,11)冷却所述粉末(12)至室温。 该气体通过管道被引入(8)。 反应气体被排出通过炉头(4),或通过在炉底(10)而形成要么。 ... ...

    HIGH SOLIDS AQUEOUS SILICA SLURRY
    10.
    发明公开
    HIGH SOLIDS AQUEOUS SILICA SLURRY 失效
    高固含量水性二氧化硅悬浮液。

    公开(公告)号:EP0435936A1

    公开(公告)日:1991-07-10

    申请号:EP89911132.0

    申请日:1989-09-21

    IPC分类号: C01B33 C08K3 C08L33 D21H19

    摘要: L'invention concerne des boues aqueuses de silice hydratée précipitée amorphe à teneur élevée en solides, lesdites boues présentant une viscosité relativement faible. La boue contient typiquement environ 40 à environ 60 % en poids de silice précipitée hydratée de structure élevée. La viscosité de la boue à teneur élevée en solides est inférieure à environ 100 centipoises. L'invention concerne aussi des procédés de production de la boue de silice aqueuse à teneur élevée en solides. Dans un mode de réalisation, on liquéfie un gâteau humide de silice amorphe précipitée hydratée et on charge le gâteau humide liquéfié dans un broyeur d'intensité élevée dans lequel la silice est broyée à l'état humide jusqu'à ce que sa granulométrie d'agglomérat moyenne soit comprise entre environ 0,3 et environ 3 microns. Dans un autre mode de réalisation, on transforme en boue de la silice précipitée amorphe sèche finement divisée dans un broyeur de suspension jusqu'à obtention du niveau de solides désiré, puis on charge cette boue dans un broyeur de haute intensité dans lequel on la broie à l'état humide jusqu'à ce que l'on atteigne la plage granulométrique d'agglomérat précitée. On peut transporter en vrac la boue à teneur élevée en solides ainsi obtenue avec seulement une agitation faible afin d'empêcher le tassement. On peut aussi ajouter un dispersant à la boue avant le broyage afin de retarder le tassement de la silice.