The present invention provides a dielectric elastomer composition which has been improved to have an excellent flame-retardant property in consideration of influence on environment and a satisfactory dielectric characteristic as a material for an antenna; and a member for the antenna formed by molding the dielectric elastomer composition. The dielectric elastomer composition contains 50 to 400 parts by weight of a metal hydroxide such as aluminum hydroxide powder, magnesium hydroxide powder and 10 to 200 parts by weight of a brominated flame retardant except polybromodiphenyl ether and polybromobiphenyl for 100 parts by weight of an elastomer such as ethylene propylene rubber. At a frequency of 1 GHz anda temperature of 30°C, a dielectric constant of the dielectric elastomer composition is not less than 3, and a dielectric loss tangent thereof is not more than 0.02. The member for the antenna is formed by molding the dielectric elastomer composition.
本发明提供了一种介电弹性体组合物,该组合物经过改进,考虑到对环境的影响,具有优异的阻燃性能和令人满意的介电特性,可作为天线的材料;还提供了一种通过模塑该介电弹性体组合物而形成的天线构件。介电弹性体组合物含有 50 至 400 份(按重量计)氢氧化铝粉末、
氢氧化镁粉末等
金属氢氧化物,以及 10 至 200 份(按重量计)
溴化阻燃剂(聚
溴二苯醚和聚
溴联苯除外)和 100 份(按重量计)
乙丙橡胶等弹性体。在频率为 1 千兆赫、温度为 30 摄氏度时,介电弹性体组合物的介电常数不小于 3,介电损耗正切不大于 0.02。天线部件是通过模压介电弹性体组合物形成的。