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    • 7. 发明授权
    • Rubber-containing styrenic resin and process for producing the same
    • 含橡胶的苯乙烯树脂及其制造方法
    • US06333381B1
    • 2001-12-25
    • US09440930
    • 1999-11-16
    • Takeshi AsadaJunichi SekiguchiTadashi TeranishiKoichi UmemotoSoko Yanagita
    • Takeshi AsadaJunichi SekiguchiTadashi TeranishiKoichi UmemotoSoko Yanagita
    • C08F27902
    • C08F279/02C08F212/06
    • The rubber-containing styrenic resin of the present invention comprises a styrenic resin matrix and a rubber component dispersed in particles. In the resin, the graft ratio of a styrenic monomer relative to the rubber component is not less than 1, the particle size of the dispersed rubber component is 0.1 to 3 &mgr;m, and the following equation (1) is satisfied: Mn=aT+b  (1) wherein Mn is the number average molecular weight of the matrix resin; T is the conversion of the styrenic monomer; a is a constant greater than 0; and b is a constant of 0 or greater. The rubber component may be a butadiene-series rubber. The particle-size distribution of the dispersed rubber component may have, for example, two peaks. Such styrenic resin can be produced by, in the presence of a rubber component, polymerizing at least a styrenic monomer at a graft ratio of not less than 1 under such conditions that the relationship between the conversion T of the styrenic monomer and the number average molecular weight Mn of the polymer can be approximated by a linear equation. According to the present invention, the morphology and the particle size of rubber particles dispersed in a styrenic resin are controllable.
    • 本发明的含橡胶的苯乙烯树脂包含分散在颗粒中的苯乙烯树脂基质和橡胶组分。 在树脂中,苯乙烯类单体相对于橡胶成分的接枝率为1以上,分散橡胶成分的粒径为0.1〜3μm,满足下式(1):其中,Mn为 基体树脂的数均分子量; T是苯乙烯单体的转化率; a是大于0的常数; b为0以上的常数。 橡胶组分可以是丁二烯系橡胶。 分散的橡胶组分的粒度分布可以具有例如两个峰。 这样的苯乙烯类树脂可以通过在橡胶成分的存在下,在接枝率不低于1的情况下聚合至少一种苯乙烯类单体,在苯乙烯类单体的转化率T与数均分子 聚合物的重量Mn可以通过线性方程近似。 根据本发明,分散在苯乙烯树脂中的橡胶颗粒的形态和粒径是可控的。
    • 10. 发明申请
    • RELAY DEVICE, WIRELESS COMMUNICATION SYSTEM AND MULTICAST RELAY METHOD
    • 继电器,无线通信系统和多媒体继电器方法
    • US20080107110A1
    • 2008-05-08
    • US11867776
    • 2007-10-05
    • Tadanao AndouTakeshi Asada
    • Tadanao AndouTakeshi Asada
    • H04L12/56
    • H04L12/189H04L12/185
    • The present invention relates to a relay device realizing multicast communications efficient and effective in mobile communications. The relay device transmitting a user data packet, containing a content, in which to set a multicast address associated with the content, to a plurality of base stations belonging to a same zone in order to wirelessly transmit the content substantially simultaneously from the plurality of base stations, comprises a storing unit storing information about a multicast group in which the mobile terminal participates together with information about the zone to which the base station performing wireless communications with the mobile terminal belongs, a generating unit generating a query packet for checking existence of the mobile terminal continuing participation in the multicast group stored therein, and a transmitting unit transmitting the user data packet containing the query packet to each of the base stations belonging to the same zone.
    • 本发明涉及实现移动通信中高效且有效的多播通信的中继装置。 所述中继装置向属于同一区域的多个基站发送包含内容的用户数据分组,所述用户数据分组将用于设置与所述内容相关联的多播地址的用户数据分组基本同时从所述多个基站 站,包括存储关于移动终端参与的多播组的信息的存储单元,与关于执行与移动终端的无线通信的基站所属的区域有关的信息;生成单元,生成用于检查所述移动终端的存在的查询分组 移动终端继续参与其中存储的多播组,以及发送单元,其将包含查询分组的用户数据分组发送到属于同一区域的每个基站。