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161 条记录 (耗时 0.04 秒)

    Fluid loss control additives for oil well cementing compositions
    43.
    发明授权
    Fluid loss control additives for oil well cementing compositions 失效
    油井固井组合物的流体损失控制添加剂

    公开(公告)号：US5228915A

    公开(公告)日：1993-07-20

    申请号：US981921

    申请日：1992-11-23

    申请人： Stefano C. Crema ,  Clare H. Kucera ,  Gerd Konrad ,  Heinrich Hartmann

    发明人： Stefano C. Crema ,  Clare H. Kucera ,  Gerd Konrad ,  Heinrich Hartmann

    IPC分类号： C04B24/16 ,  C04B24/26 ,  C04B28/02 ,  C09K8/46 ,  C09K8/487

    CPC分类号： C04B24/26 ,  C04B24/16 ,  C04B28/02 ,  C09K8/46 ,  C09K8/487 ,  C04B2103/46

    摘要： A cementing composition useful in cementing oil, gas and water wells, comprising water, hydraulic cement and an effective amount of water soluble fluid loss additive comprised of a blend of a copolymer (i) of acrylamide/vinyl imidazole in a weight percent ratio of from about 95:5 to 5:95, said copolymer (i) having a molecular weight range of from about 100,000 to 3,000,000, and a copolymer (ii) of vinyl pyrrolidone and the sodium salt of vinyl sulfonate in a weight percent ratio of 80:20 to 20:80, said copolymer (ii) having a molecular weight range of from about 100,000 to 3,000,000. The blend is comprised of a weight percent ratio of copolymer (i) to copolymer (ii) in the range of 20:80 to 80:20. The composition can also optionally include a dispersant such as sodium or potassium salts or a sulfonated naphthalene formaldehyde condensate.

    摘要翻译： 用于固井油，气和水井的固井组合物，包括水，水硬性水泥和有效量的水溶性流体损失添加剂，其由丙烯酰胺/乙烯基咪唑共聚物（i）的共混物组成，其重量百分比为 约95:5至5:95，所述共聚物（i）的分子量范围为约100,000至3,000,000，和乙烯基吡咯烷酮和乙烯基磺酸钠盐的共聚物（ii）的重量比为80： 20至20:80，所述共聚物（ii）的分子量范围为约100,000至3,000,000。 共混物由共聚物（i）与共聚物（ii）的重量百分比的比例在20:80至80:20的范围内组成。 组合物还可任选地包括分散剂如钠盐或钾盐或磺化萘甲醛缩合物。

    Graft copolymers of monosaccharides, oligosaccharides, polysaccharides and modified polysaccharides, the preparation thereof, and their use
    44.
    发明授权
    Graft copolymers of monosaccharides, oligosaccharides, polysaccharides and modified polysaccharides, the preparation thereof, and their use 失效
    单糖，低聚糖，多糖和改性多糖的共聚物，其制备及其使用

    公开(公告)号：US5227446A

    公开(公告)日：1993-07-13

    申请号：US649063

    申请日：1991-02-01

    申请人： Walter Denzinger ,  Heinrich Hartmann ,  Alexander Kud ,  Richard Baur ,  John Feldmann ,  Hans-Juergen Raubenheimer

    发明人： Walter Denzinger ,  Heinrich Hartmann ,  Alexander Kud ,  Richard Baur ,  John Feldmann ,  Hans-Juergen Raubenheimer

    IPC分类号： C08F251/00 ,  C11D3/22 ,  C11D3/37

    CPC分类号： C08F251/00 ,  C11D3/228 ,  C11D3/3788

    摘要： Graft copolymers obtainable by free radical-initiated copolymerization of(A) a monomer mixture comprising(a) a monoethylenically unsaturated C.sub.4 - to C.sub.8 -dicarboxylic acid, or an anhydride, alkali metal salt or ammonium salt thereof,(b) a monoethylenically unsaturated C.sub.3 - to C.sub.10 -carboxylic acid, or an alkali metal salt or ammonium salt thereof,(c) if desired another monoethylenically unsaturated monomer which can be copolymerized with monomer (a) and (b), and(d) a monomer containing two or more ethylenically unsaturated, non-conjugated double bonds in the molecule, in the presence of(B) a monosaccharide, oligosaccharide, polysaccharide, oxidatively, hydrolytically or enzymatically degraded polysaccharide, oxidized, hydrolytically or enzymatically degraded polysaccharide, or chemically modified monosaccharide, oligosaccharide or polysaccharide,in the weight ratio (A):(B) of (95 to 20):(5 to 80), a process for the preparation of the graft copolymers, and detergents and cleaners containing the graft copolymers in amounts of from 0.1 to 20% by weight, are described.

    摘要翻译： 通过（A）单体混合物的自由基引发共聚获得的接枝共聚物，其包含（a）单烯键式不饱和C4-C8-二羧酸或其酸酐，碱金属盐或铵盐，（b）单烯属不饱和C3 （c）如果需要，可以与单体（a）和（b）共聚的另一单烯属不饱和单体，和（d）含有两个或更多个单体的单体 在（B）单糖，寡糖，多糖，氧化，水解或酶促降解的多糖，氧化，水解或酶促降解的多糖或化学修饰的单糖，寡糖或多糖的存在下，分子中的烯键式不饱和，非共轭双键 （95〜20）：（5-80）的重量比（A）:( B）：制备接枝共聚物的方法，以及洗涤剂和清洁剂 描述了接枝共聚物的量为0.1-20重量％。

    Preparation of finely divided, gel-like, water-swellable copolymers
    47.
    发明授权
    Preparation of finely divided, gel-like, water-swellable copolymers 失效
    精细分散，凝胶状，水溶性共聚物的制备

    公开(公告)号：US5149750A

    公开(公告)日：1992-09-22

    申请号：US438876

    申请日：1989-11-20

    申请人： Manfred Niessner ,  Stefan Wickel ,  Wilfried Heide ,  Heinrich Hartmann

    发明人： Manfred Niessner ,  Stefan Wickel ,  Wilfried Heide ,  Heinrich Hartmann

    IPC分类号： A61L15/60 ,  C08F2/10 ,  C08F2/20 ,  C08F2/24 ,  C08F220/04 ,  C08F220/06 ,  C08F290/00 ,  C08F290/04 ,  C08F299/02

    CPC分类号： C08F2/10 ,  A61L15/60 ,  Y10S526/909 ,  Y10S526/93

    摘要： Finely divided, gel-like, water-swellable copolymers are prepared by copolymerizing(a) 100 parts by weight of water-soluble, monoethylenically unsaturated monomers,(b) from 0.01 to 5 parts by weight of monomers containing two or more ethylenically unsaturated double bonds and(c) from 0 to 20 parts by weight of water-insoluble, monoethylenically unsaturated monomersin 20-80% strength by weight aqueous solution in the presence of a polymerization initiator and from 0.1 to 10% by weight, based on the monomers used in the copolymerization, of a surfactant, by a process in which the monomers are copolymerized in the presence of initially from 0 to 50% by weight of the amount of surfactant to a conversion of not less than 60%, the remaining amount of surfactant is then added to the reaction mixture and the copolymerization is completed and the resulting gel particles dried.

    摘要翻译： 通过共聚合（a）100重量份的水溶性单烯属不饱和单体，（b）0.01至5重量份含有两个或更多个烯属不饱和双键的单体，制备细分，凝胶状，水溶胀性共聚物 键，和（c）0-20重量份的在聚合引发剂存在下的20-80％重量比的水溶液和基于单体的0.1-10％重量的水不溶性单烯属不饱和单体 用于表面活性剂的共聚中，其中单体在最初为0至50重量％的表面活性剂的量存在下进行共聚，转化率不低于60％，表面活性剂的剩余量 然后加入到反应混合物中，共聚完成，所得凝胶颗粒干燥。