公开(公告)号：EP0793621B1

公开(公告)日：2002-01-23

申请号：EP95942428.4

申请日：1995-11-16

Applicant: MINERALS TECHNOLOGIES INC.

Inventor： DRUMMOND, Donald, Kendall

IPC: C01F11/18 ,  C09C1/02

CPC classification number: C09C1/021 ,  C01F11/185 ,  C01P2006/80

Abstract: A method for lowering the iron content of calcium carbonate is disclosed. The method involves addition of an iron chelating agent to an aqueous calcium carbonate slurry, reducing the pH of the aqueous calcium carbonate slurry by employing carbon dioxide containing gas, while maintaining the aqueous calcium carbonate slurry at an elevated temperature. The slurry is stirred, filtered, washed and dried. The calcium carbonate product resulting from the process of the present invention has a reduced iron content. Calcium carbonate produced according to the method of this invention is particularly suitable for use as food or pharmaceutical additives and may also be useful as a filler in papermaking processes or as additives in plastic products.

公开(公告)号：EP0800596B1

公开(公告)日：2000-05-24

申请号：EP95942429.2

申请日：1995-11-16

Applicant: MINERALS TECHNOLOGIES INC.

Inventor： DRUMMOND, Donald, Kendall

IPC: D21C9/10 ,  D21H21/32

CPC classification number: D21H21/32 ,  D21C9/1026

Abstract: The present invention discloses the use of bleaching agents to increase the brightness of filled paper. In the process of the present invention, filled paper is treated with bleaching agents during the papermaking process. The process may be used on all grades of paper that contain filler. However, the present invention is particularly useful on low brightness grade papers that are produced from mechanical pulps and contain a calcium carbonate.

公开(公告)号：EP0895522A1

公开(公告)日：1999-02-10

申请号：EP97918817.0

申请日：1997-04-22

Applicant: MINERALS TECHNOLOGIES INC.

Inventor： RADOSTA, Joseph, A.

IPC: C01B33 ,  C08J3 ,  C08J5 ,  C08K3 ,  C08L23 ,  C09C1 ,  C09K3

CPC classification number: C08J5/18 ,  C08J3/226 ,  C08J2323/02 ,  C08J2423/00 ,  C08K3/34

Abstract: This invention concerns a mixture of a first component selected from talcs and a second component selected from feldspars, nephelines and nepheline syenites, wherein the ratio of the first component to the second component provides an enhanced abrasiveness property. The invention further relates to an antiblock agent made from such mixture. This mixture provides favorable optical properties when used in a polyolefin film. This invention also relates to a polyolefin resin composition having the mixture therein, as well as to films made with such.

公开(公告)号：EP0817761A1

公开(公告)日：1998-01-14

申请号：EP96909889.0

申请日：1996-03-29

Applicant: MINERALS TECHNOLOGIES INC.

Inventor： DODY, Julie, Annette ,  RUMPELTIN, Charles, R., Jr.

IPC: C04B35

CPC classification number: C04B38/10 ,  C04B35/6303 ,  C04B35/6306 ,  C04B35/632 ,  C04B35/66 ,  C04B35/80 ,  C04B2235/3205 ,  C04B2235/3206 ,  C04B2235/3445 ,  C04B35/04 ,  C04B38/08

Abstract: Tundishes and ladles used in processing molten metals and alloys frequently contain both as permanent and disposable linings. The disposable lining acts as a thermal and chemical barrier to protect the permanent lining. However, the presence of alkali in the disposable lining results in a tendency to bond to the permanent lining making removal of the disposable lining difficult. The present invention provides a disposable lining material comprising: a basic refractory aggregate comprising magnesia, magnesite, olivine, doloma, dolomite, calcia, or mixtures thereof; and at least one density reducing material comprising hollow ceramic microspheres in an amount sufficient to reduce the density of the composition.

Abstract translation: 用于处理熔融金属和合金的中间包和钢包通常包含永久性和一次性衬里。 一次性衬里充当热和化学屏障以保护永久衬里。 然而，一次性衬里中碱的存在导致结合到永久衬里的趋势，使得去除一次性衬里变得困难。 本发明提供了一种一次性衬里材料，其包括：包含氧化镁，菱镁矿，橄榄石，煅烧白云岩，氧化钙或其混合物的碱性耐火骨料; 以及至少一种包含足以降低组合物密度的量的中空陶瓷微球体的密度降低材料。

公开(公告)号：EP0797704A1

公开(公告)日：1997-10-01

申请号：EP95918439.0

申请日：1995-05-16

Applicant: MINERALS TECHNOLOGIES INC.

Inventor： GILL, Robert, A.

IPC: C08K9 ,  C08L1 ,  C09C1 ,  C09C3 ,  D21H11 ,  D21H17 ,  D21H21

CPC classification number: D21H21/16 ,  C01P2006/12 ,  C09C1/021 ,  C09C3/006 ,  C09C3/063 ,  C09C3/08 ,  C09C3/10 ,  D21H17/69

Abstract: An inorganic filler composition and a method for the use thereof wherein the inorganic filler has been pre-treated with an anionic treating agent and a cationic polymer to produce a dual treated inorganic filler. The surface-treated inorganic filler materials of the present invention are particularly suitable for use in papermaking processes where sizing and other properties, such as strength and optical performance are important.

公开(公告)号：EP0731826A1

公开(公告)日：1996-09-18

申请号：EP95901101.0

申请日：1994-11-01

Applicant: MINERALS TECHNOLOGIES INC.

Inventor： FAIRCHILD, George, H.

IPC: C08K3 ,  C08L1 ,  C09C1 ,  C09C3 ,  D21H11 ,  D21H17

CPC classification number: D21H17/26 ,  C01P2004/30 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/60 ,  C09C1/021 ,  C09C3/10 ,  D21H17/675 ,  D21H17/69

Abstract: The disclosed invention relates to a composition comprising finely divided particles of an inorganic material treated with a cellulose derivative modified by or containing at least one ionic substituent. The disclosed invention further relates to a method of providing paper of improved brightness. The disclosed invention also relates to a method of providing finely divided particles of inorganic material, treating the particles with a cellulose derivative modified by or containing at least one ionic substituent, and adding the treated particles to cellulose fiber during an alkaline process for making paper. Also, an alkaline paper comprising the finely divided particles of inorganic material treated with the cellulose derivative is disclosed.

公开(公告)号：EP0722422A1

公开(公告)日：1996-07-24

申请号：EP94926477.0

申请日：1994-08-04

Applicant: MINERALS TECHNOLOGIES INC.

Inventor： COX, Sherman, D. ,  WISE, Kenneth, J.

IPC: C01F7 ,  B01J20 ,  C08K3 ,  C09C1 ,  C09D5 ,  C09D7 ,  D21H19

CPC classification number: B01J20/08 ,  B01J20/041 ,  B01J20/28004 ,  B01J20/28011 ,  B01J20/28019 ,  B01J20/28059 ,  B01J20/28069 ,  B01J20/30 ,  B82Y30/00 ,  C01F7/005 ,  C01P2002/22 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/45 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/14 ,  C09C1/40

Abstract: An aggregated synthetic hydrotalcite having a substantially spheroidal shape and an average diameter of up to about 60 νm is disclosed. The aggregates are composed of individual platy particles having plate diameters of from about 0.05 to about 10νm. The material has a low tapped density, a high pore volume and a high specific surface area. A process for producing the product is also disclosed. Product particle size is determined by controlling process parameters including reaction temperature and pH, stirring speed of the reaction mixture, and reactant addition rates and concentrations, including aqueous solutions of soluble magnesium and aluminum salts, which are mixed in a molar ratio from about 2.5:1 to 4:1, and a basic solution containing excess carbonate and base to maintain the reaction mixture at a pH of from about 8.5 to about 9.5.

公开(公告)号：EP0633864A1

公开(公告)日：1995-01-18

申请号：EP93908355.0

申请日：1993-03-12

Applicant: MINERALS TECHNOLOGIES, INC.

Inventor： KROC, Vicki, J. ,  FAIRCHILD, George, H.

IPC: C01F11 ,  D21H17 ,  D21H21

CPC classification number: C01F11/181 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/30 ,  C01P2004/40 ,  C01P2004/45 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/12 ,  D21H17/675 ,  D21H21/52

Abstract: Novel precipitated calcium carbonate particles in clustered form, which when used as fillers impart improved strength, opacity and other advantages to paper, are prepared by a process involving adding lime and carbon dioxide to a reaction mixture containing seed material having a scalenohedral morphology, the lime and carbon dioxide being added simultaneously. The flow rates of the lime and carbon dioxide are adjusted to control the solution conductivity of the reaction minute to between about 2.0 and about 4.0 mS to form the clusters of calcite particles, the clusters having an average equivalent spherical diameter of between about 1.5 and 3.5 microns and a specific surface area of between about 2.0 and 9.0 m2/g. At least about 25% of the particles of said clusters have a prismatic form.

Abstract translation: 集束形式的新型沉淀碳酸钙颗粒在用作填料时赋予纸张改进的强度，不透明度和其他优点，通过如下方法制备：将石灰和二氧化碳加入含有具有偏三角面体形态的种子材料的反应混合物中，石灰 并同时添加二氧化碳。 调节石灰和二氧化碳的流速以控制反应混合物的溶液电导率在约2.0和约4.0mS之间以形成方解石颗粒簇，所述簇的平均等效球直径在约1.5和3.5之间 微米，并且比表面积在约2.0和9.0m 2 / g之间。 至少约25％的所述簇的颗粒具有棱柱形式。

公开(公告)号：EP0472350A1

公开(公告)日：1992-02-26

申请号：EP91307480.3

申请日：1991-08-13

Applicant: MINERALS TECHNOLOGIES INC.

Inventor： Taniguchi, Teruhiko ,  Ishikawa, Kentaro

IPC: C04B35/66 ,  C04B35/06

CPC classification number: C04B35/6303 ,  C04B35/06 ,  C04B35/632 ,  C04B35/66 ,  C04B2111/00155 ,  C04B2111/00887 ,  C04B2235/3205 ,  C04B2235/3206 ,  C04B2235/9676

Abstract: A refractory material containing a synthetic dolomite aggregate having a calcium carbonate coating on the surface thereof and further containing magnesia, a binder, a plasticizer, an organic fiber homogenizer, a bond stabilizer, and a dispersant; and a method of forming a protective refractory surface on the lining of a tundish, steel ladle and the like by spraying, gunning or troweling the surface coated aggregate-containing refractory material thereon are disclosed. This material offers the multiple advantages of improving resistance to slaking, reducing alumina inclusions in the steel, and reducing clogging of the tundish nozzle.

Abstract translation: 含有合成白云石聚集体的耐火材料，其表面具有碳酸钙涂层，并且还含有氧化镁，粘合剂，增塑剂，有机纤维均化器，粘合稳定剂和分散剂; 并公开了在中间包，钢水包等的衬里上形成保护性耐火表面的方法，该方法是通过在其上喷涂，喷涂或玷污表面涂覆有骨料的耐火材料来形成。 该材料具有改善耐磨性，减少钢中的氧化铝夹杂物并减少中间包喷嘴堵塞的多重优点。

公开(公告)号：EP0425139A1

公开(公告)日：1991-05-02

申请号：EP90311160.7

申请日：1990-10-11

Applicant: MINERALS TECHNOLOGIES INC.

Inventor： Cheng, Jung-Jen A. ,  Hale, Amy P. ,  Martinez, Winfred Anthony

IPC: C04B35/66 ,  C04B38/06 ,  C04B41/50

CPC classification number: C04B28/344 ,  C04B35/66 ,  C04B38/0675 ,  C04B2103/30 ,  C04B2103/40 ,  C04B2111/00155 ,  C04B2111/00482 ,  C04B2111/0087 ,  C04B12/04 ,  C04B14/10 ,  C04B14/30 ,  C04B22/062 ,  C04B22/147 ,  C04B24/16 ,  C04B24/32 ,  C04B38/10 ,  C04B40/0268 ,  C04B24/04 ,  C04B24/383 ,  C04B35/00 ,  C04B38/0051 ,  C04B38/065 ,  C04B38/067

Abstract: Lightweight, low density magnesia-based tundish refractory compositions containing from 0.01 to 2.00 weight percent styrofoam beads and up to 5.0 weight percent paper fiber are disclosed. The compositions have excellent rapid heating, thermal insulative, vertical adhesion and deskullability properties. The compositions are useful as a lining applied over the permanent lining of a tundish, such as is used in continuous molten metal casting processes.

Abstract translation: 公开了含有0.01至2.00重量％发泡胶珠和至多5.0重量％纸纤维的轻质低密度氧化镁中间包耐火材料组合物。 该组合物具有优异的快速加热，热绝缘性，垂直粘合性和桌面性。 组合物可用作施加在中间包的永久衬里上的衬里，例如用于连续熔融金属铸造工艺中的衬里。