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    • 1. 发明申请
    • THERMOPLASTIC RESIN AND PREPARATION THEREOF
    • 热塑性树脂及其制备方法
    • WO2003044069A1
    • 2003-05-30
    • PCT/KR2002/001884
    • 2002-10-09
    • LG CHEM, LTD.CHAI, Joo-ByungLEE, Chan-HongYANG, Byung-TaeKIM, Kun-Su
    • CHAI, Joo-ByungLEE, Chan-HongYANG, Byung-TaeKIM, Kun-Su
    • C08F279/04
    • C08L25/12C08F279/04C08L55/02C08F2/22C08L2666/24C08L2666/04
    • The present invention relates to ABS thermoplastic resin and preparation thereof, and particularly to a process for preparing an ABS graft copolymer comprising the step of introducing to a) 40 to 80 weight parts of rubber latex comprising i) 10 to 50 weight parts of large diameter polybutadiene rubber latex having a particle diameter of 2500 to 3500 Å, gel contents of 60 to 80%, and a swelling index to 12 to 30, and ii) 50 to 90 weight parts of large diameter rubber latex having a particle diameter of 2500 to 3500 Å, gel contents of 81 to 97%, and a swelling index of 18 to 40, b) 20 to 60 weight parts of a monomer mixture of two or more kinds selected from a group consisting of aromatic vinyl compounds and vinyl cyanide compounds to prepare a graft copolymer, wherein 5 to 30 wt% of the monomer mixture is introduced as a batch and simultaneously 70 to 95 wt% of the monomer mixture is started to be continuously introduced in an emulsified state, and a thermoplastic resin composition using the same. According to the process of the present invention, control of polymerization heat is easy even at high solid contents, and polymerization cohesion contents can be minimized and thus ABS thermoplastic resin having superior impact resistance, gloss, and coloring property can be provided.
    • 本发明涉及ABS热塑性树脂及其制备方法,特别涉及制备ABS接枝共聚物的方法,该方法包括以下步骤:向a)40至80重量份的橡胶胶乳中引入,其包含i)10至50重量份的大直径 粒径为2500〜3500埃的聚丁二烯橡胶胶乳,凝胶含量为60〜80%,溶胀指数为12〜30,ii)50〜90重量份的粒径为2500〜 3500 ANGSTROM,凝胶含量为81〜97%,溶胀指数为18〜40,b)20〜60重量份选自芳族乙烯基化合物和乙烯基氰化合物的两种或更多种的单体混合物, 制备接枝共聚物,其中以批料引入5〜30重量%的单体混合物,同时70-90重量%的单体混合物开始以乳化状态连续引入,热塑性树脂 组合使用相同。 根据本发明的方法,即使在固体含量高的情况下聚合热的控制也容易,聚合内聚物含量可以最小化,因此可以提供具有优异抗冲击性,光泽和着色性能的ABS热塑性树脂。
    • 2. 发明申请
    • TIME RESOURCE ALLOCATION METHOD OF ULTRA WIDEBAND COMMUNICATION SYSTEM
    • 超宽带通信系统的时间资源分配方法
    • WO2006071045A1
    • 2006-07-06
    • PCT/KR2005/004564
    • 2005-12-27
    • LG ELECTRONICS INC.KIM, Ji HyeKIM, Kun SuKIM, Jong SungSEONG, Hang Dong
    • KIM, Ji HyeKIM, Kun SuKIM, Jong SungSEONG, Hang Dong
    • H04L12/28
    • H04W16/14H04B1/69H04W52/283H04W64/006H04W72/0413H04W72/0446H04W84/18H04W92/18
    • A time resource allocation method of ultra wideband (UWB) communication system is disclosed wherein transmission power is adjusted in a UWB communication system to appropriately allocate time resources of data transmission period. The present invention is such that determination is made as to whether there are time resources for allocation to a second UWB communication device if the second UWB communication device requests allocation of time resources while a plurality of first UWB communication devices are allocated with time resources of data transmission period. As a result of the determination, if time resources are lacking for allocation to the second UWB communication device, the first UWB communication device and the second UWB communication device measure a distance therebetween, and a wireless network region is divided by the measured distance and adjusted transmission power to enable to allocate time resource to the second UWB communication device.
    • 公开了一种超宽带(UWB)通信系统的时间资源分配方法,其中在UWB通信系统中调整发送功率以适当地分配数据传输周期的时间资源。 本发明使得如果第二UWB通信设备在多个第一UWB通信设备被分配有数据的时间资源的情况下请求分配时间资源,则确定是否存在用于分配给第二UWB通信设备的时间资源 传输期。 作为确定的结果,如果缺少分配给第二UWB通信设备的时间资源,则第一UWB通信设备和第二UWB通信设备测量它们之间的距离,并且将无线网络区域除以测量的距离并且被调整 发送功率以能够将时间资源分配给第二UWB通信设备。