Chain extending polyurethanes with a large excess of water
    1.
    发明授权
    Chain extending polyurethanes with a large excess of water 失效
    链延长聚氨酯与大量过量的水

    公开(公告)号:US4049632A

    公开(公告)日:1977-09-20

    申请号:US705117

    申请日:1976-07-14

    摘要: A polyurethane-urea composition is described that is highly resistant to textile fiber-dressings. The composition is a product from the reaction of an ester urethane prepolymer formed from the reaction of a diisocyanate and a hydroxy-terminated polyester of equivalent weight 400-1,000 in which the ratio of isocyanate functionality:hydroxy functionality is from 2.0:1 to 4.0:1; and an excess of water.

    摘要翻译: 描述了高度耐纺织纤维敷料的聚氨酯 - 尿素组合物。 该组合物是由二异氰酸酯和当量重量为400-1,000的羟基封端的聚酯反应形成的酯氨基甲酸酯预聚物的反应产物,其中异氰酸酯官能度:羟基官能度的比例为2.0:1至4.0:1, 1; 和过量的水。

    Monitoring system for vehicles
    2.
    发明授权
    Monitoring system for vehicles 失效
    车辆监控系统

    公开(公告)号:US4009375A

    公开(公告)日:1977-02-22

    申请号:US574827

    申请日:1975-05-05

    CPC分类号: G08G1/127 G07C5/0841 G07C9/00

    摘要: A vehicle monitoring system is disclosed in which a central control station is provided for the vehicles, for example buses, in the system. Each vehicle is provided with a transit universal microprocessor unit, including a modulator-demodulator, and one or more peripheral devices and a radio communication link is provided between the vehicles and the central control station. Typical peripheral devices are odometers, passenger counters, drive switches and display devices, loudspeakers, etc.

    摘要翻译: 公开了一种车辆监视系统,其中为系统中的车辆(例如总线)提供中央控制站。 每个车辆设置有转运通用微处理器单元,包括调制器解调器和一个或多个外围设备,并且在车辆和中央控制站之间提供无线电通信链路。 典型的外围设备是里程表,乘客计数器,驱动开关和显示设备,扬声器等。