Diurea grease composition
    454.
    发明授权
    Diurea grease composition 失效
    二脲油脂组合物

    公开(公告)号:US5145591A

    公开(公告)日:1992-09-08

    申请号:US547880

    申请日:1990-07-03

    Abstract: A diurea grease composition contains a base oil and 2 to 25 wt.%, based on the total weight of the composition, of a diurea compound, the diurea grease compound being produced by reacting a mixed system of two or more different diisocyanates represented by the formula (I) OCN--R--NCO wherein R stands for a straight-chained or branched alkylene group, a straight-chained or branched alkenylene group, a cycloalkylene group or an aromatic group, with an amine compound selected from the group consisting of a primary amine represented by the formula (II) R.sub.1 --NH.sub.2 wherein R.sub.1 stands for a hydrocarbon residue having 6 to 20 carbon atoms, a secondary amine represented by the formula (III) ##STR1## wherein R.sub.2 and R.sub.3 each stand for hydrocarbon residues having 6 to 20 carbon atoms, and mixtures thereof.

    Abstract translation: 二脲润滑脂组合物含有基础油和基于组合物总重量的2至25重量%的二脲化合物,所述二脲油脂化合物是通过使由两种或更多种不同的二异氰酸酯表示的混合体系 式(I)OCN-R-NCO其中R代表直链或支链亚烷基,直链或支链亚烯基,亚环烷基或芳族基团,其中胺化合物选自 由式(II)表示的伯胺R1-NH2其中R1代表具有6至20个碳原子的烃残基,由式(III)表示的仲胺其中R2和R3各代表具有6个 至20个碳原子,及其混合物。

    Electric field dependent fluids
    457.
    发明授权
    Electric field dependent fluids 失效
    电场依赖流体

    公开(公告)号:US4879056A

    公开(公告)日:1989-11-07

    申请号:US111938

    申请日:1987-10-21

    Abstract: An improved method of inducing a change in the dynamic torque transmission of an electrorheological fluid in response to an electric field at low current comprising the steps of: (a) selecting a nonconductive liquid phase (e.g. high dielectric hydrocarbon oil); (b) dispersing in the nonconductive liquid phase a particulate phase substantially free of adsorbed water (e.g. zeolite); and (c) subjecting the resulting electrorheological fluid to an electric potential in excess of about one kilovolt at a current density of less than about one-third microamp per square inch. Such a method achieves a rate of increase of dynamic transmission of torque per unit voltage, dM/dV, in excess of about 0.034 ft-lbs.times.10.sup.-3 /kV and a ratio of dynamic transmission of torque at an electric field strength of at least 2.4 kV to the dynamic transmission of torque at zero field strength, M/Mo, of at least about 2.

    Abstract translation: 响应于低电流下的电场而引起电流变流体的动态转矩传递变化的改进方法包括以下步骤:(a)选择非导电液相(例如高介电烃油); (b)在非导电液相中分散基本上不含吸附水(例如沸石)的颗粒状相; 和(c)以小于约三分之一微安/平方英寸的电流密度对所得的电流变流体进行超过约一千伏的电势。 这种方法实现了每单位电压(dM / dV)的动力传递的增加速率超过​​约0.034ft-lbs×10-3 / kV,并且电场强度下的扭矩的动态传递比至少为2.4 kV至零电场强度M / Mo处的扭矩的动态传递至少约为2。

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