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    • 2. 发明授权
    • Accelerator system for crosslinking polymers which harden on exposure to
the moisture in air
    • 用于交联聚合物的促进剂体系,其在暴露于空气中的水分时变硬
    • US6124235A
    • 2000-09-26
    • US888323
    • 1997-07-03
    • Michel LetoffeJean-Marc Pujol
    • Michel LetoffeJean-Marc Pujol
    • C08L83/04C08J3/24C08K3/32C08K3/38C08K5/00C08K5/54C08K13/02C08L101/00C08L101/02C08L101/10B01J23/00B01J21/02B01J21/08B01J23/32
    • C08K5/54C08K3/32C08K3/38C08K5/0025
    • An accelerator system for the cold crosslinking of polymers which harden on exposure to moisture by hydrolysis/condensation, comprising: (C) x parts by weight of a catalyst for crosslinking the said polymers by polycondensation, x ranging from 0.01 to 10; (E) Y parts by weight of a solid inorganic compound containing an amount y of water in the form of water of hydration and/or water adsorbed by capillary condensation, this amount y ranging from 0.5 to 40 parts by weight, and which can represent up to 70% of the weight of the said solid inorganic compound; (F) z parts by weight of fillers, z ranging from 0 to 50; (D) 100-(x+Y+z) parts by weight of a diluent or of a solvent of the said catalyst (C), the diluent or solvent having a dynamic viscosity at 25.degree. C. of the order of 50 to 200,000 mPa.s; the respective amounts of the four constituents (C), (E), (F) and (D) being such that the system obtained exists in the form of a manipulable paste. The accelerator system is used for accelerating silicone compositions which harden on exposure to the moisture in air.
    • 用于通过水解/缩合使得在暴露于水分时硬化的聚合物的冷交联的加速剂体系包括:(C)x重量份用于通过缩聚交联所述聚合物的催化剂,x为0.01至10; (E)Y重量份含有以水分和/或毛细管冷凝吸附的水的形式的水的y的固体无机化合物,该量y为0.5〜40重量份,并且可以代表 高达70%的所述固体无机化合物的重量; (F)z重量份的填料,z为0至50; (D)100-(x + Y + z)重量份稀释剂或所述催化剂(C)的溶剂,稀释剂或溶剂在25℃下的动态粘度为50至200,000 mPa.s; 四种成分(C),(E),(F)和(D)的相应量使得所获得的体系以可操作的糊剂的形式存在。 加速器系统用于加速在暴露于空气中的水分时变硬的硅酮组合物。
    • 8. 发明授权
    • Treatment/removal of byproduct aqueous effluents comprising
hydroxynitro-aromatic compounds
    • 包含羟基硝基芳族化合物的副产物含水废水的处理/除去
    • US5820764A
    • 1998-10-13
    • US959731
    • 1997-10-28
    • Faouzi JoulakLouis Le BrisPhilippe Marion
    • Faouzi JoulakLouis Le BrisPhilippe Marion
    • C02F1/66C02F9/00C07C201/16C02F1/52
    • C02F1/66C07C201/16C02F2103/36Y10S210/909
    • Objectionable byproduct aqueous effluents containing contaminating amounts of hydroxynitroaromatic compounds, in particular those aqueous effluents produced during the synthesis of nitroaromatic compounds, e.g., dinitrotoluenes, via reaction of an aromatic compound with nitric acid in the presence of sulfuric acid, are efficiently, facilely and economically treated/removed by (a) intimately contacting a mixture of at least one nitroaromatic compound and at least one hydroxynitroaromatic compound with an aqueous wash medium containing a neutralizing agent, (b) separating the resulting admixture into an organic phase and an aqueous phase, (c) recycling a fraction of the separated aqueous phase to the aqueous wash medium to thus constitute a portion thereof, and (d) periodically draining a fraction of the wash medium, whether to destruction thereof or to waste.
    • 含有污染量的羟基硝基芳族化合物的有害副产物含水废水,特别是在硫酸存在下通过芳族化合物与硝酸的反应合成硝基芳族化合物(例如二硝基甲苯)期间产生的含水废水,是有效,便利和经济的 通过(a)使至少一种硝基芳族化合物和至少一种羟基硝基芳族化合物的混合物与含有中和剂的水性洗涤介质紧密接触来处理/除去,(b)将所得混合物分离成有机相和水相( c)将分离的水相的一部分循环到水性洗涤介质中,从而构成其一部分,和(d)定期排出洗涤介质的一部分,不管其是否破坏或浪费。