| 摘要 |
PCT No. PCT/JP97/04900 Sec. 371 Date Aug. 26, 1998 Sec. 102(e) Date Aug. 26, 1998 PCT Filed Dec. 26, 1997 PCT Pub. No. WO98/29475 PCT Pub. Date Jul. 9, 1998Polyorganosiloxazane is provided which is capable of being converted into a ceramic material having low dielectric constant. The polymer according to the present invention is characterized by comprising the main repeating units of -(RSiN3)-, -(RSiN2O)-, -(RSiNO2)- and -(RSiO3)-, wherein, R represents an alkyl, alkenyl, cycloalkyl, aryl, alkylamino or alkylsilyl group, and by having a number-average molecular weight ranging from 300 to 100,000. The polyorganosiloxazane of the present invention has superior thermal resistance, and a ceramic material obtainable by firing the same at a predetermined temperature shows very low specific dielectric constant of 2.7 or less, making it useful particularly as a material in electronics.
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