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    METHOD OF PREPARING ABRASIVE ARTICLES
    221.
    发明申请
    METHOD OF PREPARING ABRASIVE ARTICLES 审中-公开
    制备磨料制品的方法

    公开(公告)号：WO1990001397A1

    公开(公告)日：1990-02-22

    申请号：PCT/US1989003310

    申请日：1989-08-01

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： THE DOW CHEMICAL COMPANY ,  TIEFENBACH, Lawrence, W., Jr.

    IPC: B24D03/00

    CPC classification number: B24D3/14

    Abstract: A method of preparing abrasive articles exhibiting improved homogeneity and breakdown properties is disclosed. The method comprises admixing abrasive grits and a bond phase comprising silica particles, alumina, a flux and water, to form a slurry, wherein the silica particles are on the average smaller than the average grit particles; drying the slurry to form a precursor powder; and compacting the precursor powder to form an abrasive greenware article. This abrasive greenware article can then be densified, for example, by sintering, to form a densified abrasive article. The resulting abrasive article has a porcelain bond composition. Because of the uniform bond composition attained with this invention, extremely fine abrasive grits can be employed.

    COMPOSITION AND METHOD FOR PRODUCING BORON CARBIDE/TITANIUM DIBORIDE COMPOSITE CERAMIC POWDERS USING A BORON CARBIDE SUBSTRATE
    225.
    发明申请
    COMPOSITION AND METHOD FOR PRODUCING BORON CARBIDE/TITANIUM DIBORIDE COMPOSITE CERAMIC POWDERS USING A BORON CARBIDE SUBSTRATE 审中-公开
    使用碳硼化物基板生产碳硼碳/二氧化钛复合陶瓷粉末的组合物和方法

    公开(公告)号：WO1989011459A1

    公开(公告)日：1989-11-30

    申请号：PCT/US1989002064

    申请日：1989-05-12

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： THE DOW CHEMICAL COMPANY ,  KHAZAI, Bijan ,  MOORE, William, G.

    IPC: C04B35/52

    CPC classification number: C04B35/58071 ,  C04B35/563 ,  C04B35/645 ,  C04B35/65

    Abstract: A boron carbide/titanium diboride composite ceramic powder is disclosed produced by mixing boron carbide and a titanium source, such that the average reactant particle size is less than 20 micrometers and substantially all discrete reactant areas are less than 50 micrometers, followed by heating the mixture wherein the boron carbide particles form substrates to which the titanium diboride particles are attached. The resulting powder has boron carbide and titanium diboride particles less than 20 micrometers in diameter. This powder can then be densified to form a part wherein the titanium diboride grains have an average size of less than 20 micrometers and the boron carbide grains having an average size of less than 50 micrometers. Because of the uniformity of initial dispersion, the densified part shows a microstructure that is also very uniform in distribution of boron carbide and titanium diboride.

    METHOD FOR MAKING COMPOSITE ARTICLES THAT INCLUDE COMPLEX INTERNAL GEOMETRY
    227.
    发明申请
    METHOD FOR MAKING COMPOSITE ARTICLES THAT INCLUDE COMPLEX INTERNAL GEOMETRY 审中-公开
    制作复合材料的方法，包括复杂的内部几何

    公开(公告)号：WO1989010334A1

    公开(公告)日：1989-11-02

    申请号：PCT/US1989001712

    申请日：1989-04-20

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： THE DOW CHEMICAL COMPANY ,  PYZIK, Aleksander, J. ,  OTT, Jack, J. ,  JANKOWSKI, Scott, J.

    IPC: C04B33/32

    CPC classification number: C04B37/042 ,  B22F5/00 ,  B22F5/10 ,  B22F2005/103 ,  C04B35/653 ,  C04B2235/6565 ,  C04B2237/32 ,  C04B2237/36 ,  C04B2237/368 ,  C22C1/1036 ,  Y10S264/36

    Abstract: A process is described for making a composite article without shrinkage, particularly of ceramic and metal wherein the article includes complex internal surfaces or cavities. The process requires forming an insert body that includes an external surface that corresponds to an internal cavity of the article. The insert body consists of a material having a melting temperature less than that of the article. The process further requires forming a porous compact about the insert body wherein the compact is formed into the substantially the net shape of the article. The compact is made of a material that is wetted by liquid insert material and has a sintering temperature greater than the wetting temperature of the insert material. The process further requires heating the article to a temperature such that the insert substantially melts and infiltrates the porous compact forming the finished composite article. The process produces products including complex internal surfaces without the necessity of costly and sometimes technically difficult internal machining operations.

    INHIBITED ALKYLENE GLYCOL COOLANT AND COOLING PROCESS
    228.
    发明申请
    INHIBITED ALKYLENE GLYCOL COOLANT AND COOLING PROCESS 审中-公开
    禁止的烷基甘油冷却剂和冷却过程

    公开(公告)号：WO1989009806A1

    公开(公告)日：1989-10-19

    申请号：PCT/US1989001544

    申请日：1989-04-13

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： THE DOW CHEMICAL COMPANY ,  RENY, Gregory, P. ,  HAYMAN, Oliver, B.

    IPC: C09K05/00

    CPC classification number: C09K5/20

    Abstract: A coolant composition containing (1) an alkylene glycol such as propylene glycol, (2) a corrosion inhibitor combination of an azole such as tolyltriazole, a molybdate salt and phosphoric acid and (3) less than 10 weight percent of water exhibits high temperature stability and corrosion inhibition for metals used in internal combustion engine cooling systems, particularly such metals as aluminum and magnesium and a process of cooling such an engine.

    Abstract translation: 含有（1）亚烷基二醇如丙二醇的冷却剂组合物，（2）唑类如甲苯基三唑，钼酸盐和磷酸的缓蚀剂组合和（3）小于10重量％的水表现出高温稳定性 以及用于内燃机冷却系统中的金属的腐蚀抑制，特别是诸如铝和镁的金属以及冷却这种发动机的工艺。

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