PREPARATION OF LINEAR POLYESTER-POLYEPOXIDE REACTION PRODUCTS VIA REACTIVE CONCENTRATE
    62.
    发明申请
    PREPARATION OF LINEAR POLYESTER-POLYEPOXIDE REACTION PRODUCTS VIA REACTIVE CONCENTRATE 审中-公开
    通过反应浓缩物制备线性聚酯 - 聚氧化物反应产物

    公开(公告)号:WO1988008597A1

    公开(公告)日:1988-11-03

    申请号:PCT/US1988001368

    申请日:1988-04-26

    CPC classification number: C08G59/4276 C08L63/00 C08L2666/18

    Abstract: Branched polyester compositions having high melt viscosities, especially under conditions of low shear, are prepared in a two-step method. The first step is the reaction of a linear polyester, polycarbonate or polyester-polycarbonate containing free carboxylic acid groups with a polyfunctional epoxyalkyl compound such as triglycidyl isocyanurate to form a reactive concentrate. The second step is the reaction of said reactive concentrate with a polyester, such as poly(ethylene terephthalate) or poly(butylene terephthalate), containing a measurable proportion of carboxylic acid end groups. By this two-step method, it is possible to use less epoxy compound for a given melt viscosity level than is the case when the epoxy compound is directly blended with the polyester.

    Abstract translation: 具有高熔融粘度的分支聚酯组合物,特别是在低剪切条件下,以两步法制备。 第一步是含有游离羧酸基团的线性聚酯,聚碳酸酯或聚酯 - 聚碳酸酯与多官能环氧烷基化合物如三缩水甘油基异氰脲酸酯反应形成反应性浓缩物。 第二步是所述反应性浓缩物与含有可测定比例的羧酸端基的聚酯如聚对苯二甲酸乙二酯或聚(对苯二甲酸丁二醇酯)的反应。 通过这种两步法,与环氧化合物与聚酯直接共混的情况相比,可以使用较少的环氧化合物。

    MONOLITHIC MICROWAVE PHASE SHIFTING NETWORK WITH MULTIPLE OUTPUTS BETWEEN WHICH A CONSTANT PHASE DIFFERENCE IS MAINTAINED OVER A LARGE FREQUENCY RANGE
    63.
    发明申请
    MONOLITHIC MICROWAVE PHASE SHIFTING NETWORK WITH MULTIPLE OUTPUTS BETWEEN WHICH A CONSTANT PHASE DIFFERENCE IS MAINTAINED OVER A LARGE FREQUENCY RANGE 审中-公开
    具有多个频率范围内恒定相位差异的多输出微单相微波相移网络

    公开(公告)号:WO1988007288A1

    公开(公告)日:1988-09-22

    申请号:PCT/US1988000839

    申请日:1988-03-16

    CPC classification number: H03H11/22 H03H7/19

    Abstract: A phase shifting network with multiple outputs between which a constant phase difference is maintained over a large frequency range is disclosed. The configuration consists of a four branch all pass network (10) which in turn consists of four similar all pass networks one in each branch (11, 12, 13, 14). An in phase and an out of phase input signal are applied to this network and four signals in phase quadrature, 0°, 90°, 180°, and 270° may be obtained from the network. The network is designed for operation at frequencies of micro and millimeter wavelengths and may be realized from resistive and capacitive elements fabricated upon a common monolithic substrate. A suitable substrate is gallium arsenide, permitting both passive and active elements to be formed and interconnected by lithographic techniques.

    TRANSFORMER WITH AMORPHOUS ALLOY CORE HAVING CHIP CONTAINMENT MEANS
    70.
    发明申请
    TRANSFORMER WITH AMORPHOUS ALLOY CORE HAVING CHIP CONTAINMENT MEANS 审中-公开
    具有芯片容纳装置的非晶合金芯的变压器

    公开(公告)号:WO1987004001A1

    公开(公告)日:1987-07-02

    申请号:PCT/US1986002613

    申请日:1986-12-08

    CPC classification number: H01F27/303 H01F27/263 H01F27/266 H01F27/324

    Abstract: A transformer comprises a tank (12) containing insulating liquid (14), and within the liquid there is an amorphous-alloy laminated core (20) that comprises spaced-apart upper and lower yokes (21, 22) and two spaced-apart legs (23, 24) at opposite ends of the yokes. Coil structure (17, 18) surrounds the legs, locating the yokes outside the coil structure. Box-like enclosures (40, 42) primarily of electrical insulating material respectively enclose the yokes in positions outside the coil structure. The enclosure (40) about the lower yoke is positioned to capture therein chips of amorphous alloy which might become detached from said core and fall toward the bottom of the tank.

    Abstract translation: 变压器包括容纳绝缘液体(14)的罐(12),并且在液体内部有非晶合金层压铁芯(20),其包括间隔开的上轭铁和下轭铁(21,22)和两个间隔开的腿 (23,24)在轭的相对端。 线圈结构(17,18)围绕腿部,将轭架定位在线圈结构外部。 主要由电绝缘材料制成的盒状外壳(40,42)分别将线圈围绕在线圈结构外部的位置。 围绕下轭的外壳(40)定位成在其中捕获可能从所述芯分离并且朝向罐的底部落下的非晶态合金的芯片。

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