| abstract |
Polyorganosiloxazane is provided which is capable ofnbeing converted into a ceramic material having lowndielectric constant. The polymer according to the presentninvention is characterized by comprising the mainnrepeating units of -(RSiN 3 )-, -(RSiN 2 O)-, -(RSiNO 2 )- andn-(RSiO 3 )-, wherein, R represents an alkyl, alkenyl,ncycloalkyl, aryl, alkylamino or alkylsilyl group, and bynhaving a number-average molecular weight ranging from 300nto 100,000. The polyorganosiloxazane of the presentninvention has superior thermal resistance, and a ceramicnmaterial obtainable by firing the same at a predeterminedntemperature shows very low specific dielectric constant ofn2.7 or less, making it useful particularly as a materialnin electronics. |