公开(公告)号：US06841629B1

公开(公告)日：2005-01-11

申请号：US09869660

申请日：2000-04-21

申请人： Mutsumi Maeda ,  Hiroaki Adachi

发明人： Mutsumi Maeda ,  Hiroaki Adachi

IPC分类号： C08G65/48 ,  C08L67/00 ,  C08L69/00 ,  C08L71/12 ,  C08L77/00 ,  C08L79/08

CPC分类号： C08G65/485 ,  C08L67/00 ,  C08L69/00 ,  C08L71/126 ,  C08L77/00 ,  C08L79/08 ,  C08L2666/14

摘要： Provided is a modified polyphenylene ether resin which is a reaction product of 100 parts by weight of (A) a polyphenylene ether having a main chain structure of the following formula (1): (wherein R1 and R4 each independently represents hydrogen, a primary or secondary lower alkyl, a phenyl, an aminoalkyl or a hydrocarbonoxy, and R2 and R3 each independently represent, hydrogen, a primary or secondary lower alkyl or a phenyl), and 0.01 to 10.0 parts by weight of (B) a modifier selected from conjugated non-aromatic diene compounds, dienophilic compounds having one dienophile group and precursors of the diene or dienophilic compounds, wherein the number of rearrangement structures each represented by the following formula (2): (wherein R1, R2, R3, and R1 have the same meanings as defined above in the formula (1)) is less than 0.01 per 100 phenylene ether units of the formula (1). The resin has sufficient functionality and is well balanced between color tone/appearance and heat resistance/mechanical physical properties.

摘要翻译： 提供一种改性聚苯醚树脂，其为100重量份的（A）具有下式（1）的主链结构的聚苯醚的反应产物:(其中R 1和R 4各自独立地表示氢，伯或 仲和低级烷基，苯基，氨基烷基或烃氧基，R 2和R 3各自独立地表示氢，伯或仲低级烷基或苯基），和0.01至10.0重量份的（B）选自共轭 非芳族二烯化合物，具有一个亲双烯体基团的二亲性化合物和二烯或二亲烯化合物的前体，其中各自由下式（2）表示的重排结构的数目:(其中R1，R2，R3和R1具有相同的 式（1）中定义的含义）每100个式（1）的亚苯基醚单元小于0.01。 该树脂具有足够的功能，并且在色调/外观和耐热性/机械物理性能之间具有良好的平衡性。

公开(公告)号：US4599648A

公开(公告)日：1986-07-08

申请号：US612835

申请日：1984-05-22

申请人： Akira Fujii ,  Tadatsugu Tokunaga ,  Hiroaki Adachi

发明人： Akira Fujii ,  Tadatsugu Tokunaga ,  Hiroaki Adachi

IPC分类号： H04N7/167 ,  H04N7/171

CPC分类号： H04N7/171 ,  H04N7/1675 ,  H04N7/1713

摘要： A video signal transmission system wherein a television video signal is subjected to a waveform conversion in a video processing unit on a transmission side, then sent to a receiving side and restored in a restoring processing unit on the receiving side. The video processing unit comprises partly polarity inverts a composite video signal containing a horizontal synchronizing signal in accordance with a pseudo-random code utilizing a horizontal scanning frequency as a clock pulse such that the while level of an inverted video signal portion will not be smaller than a peak level of a non-inverted horizontal synchronizing signal portion. The restoring processing unit on the receiving side inverts again the polarity of the polarity inverted composite video signal portion in accordance with the pseudo-random code to obtain a restored composite video signal portion having the same polarity as the original composite video signal. A difference between the peak level of the horizontal synchronizing signal of the inverted and restored composite video signal portion and the peak level of the horizontal synchronizing signal of the non-inverted composite video signal portion is detected and feedback to the input of the restoring processing unit so as to control these peak levels to the same level.

摘要翻译： 一种视频信号传输系统，其中电视视频信号在发送侧的视频处理单元中进行波形转换，然后发送到接收侧并在接收侧的恢复处理单元中恢复。 视频处理单元包括部分地将包含水平同步信号的复合视频信号根据伪随机码反转，利用水平扫描频率作为时钟脉冲，使得反相视频信号部分的同时电平不会小于 非反相水平同步信号部分的峰值电平。 接收侧的恢复处理单元根据伪随机码再次反转极性反转的复合视频信号部分的极性，以获得具有与原始复合视频信号相同极性的恢复的复合视频信号部分。 检测反相复原视频信号部分的水平同步信号的峰值电平与非反相复合视频信号部分的水平同步信号的峰值电平之差，并将其反馈到恢复处理单元的输入端 以便将这些峰值水平控制在同一水平。