C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
261/6, 402/8, 26
C08G 77/60 (2006.01) C04B 35/58 (2006.01)
Patent
CA 1336100
Preceramic acetylenic polysilanes are described which contain -(CH2)wC?CR' groups attached to silicon where w is an integer from 0 to 3 and where R' is hydrogen, an alkyl radical containing 1 to 6 carbon atoms, a phenyl radical, or an -SiR'''3 radical wherein R''' is an alkyl radical containing 1 to 4 carbon atoms. The acetylenic polysilanes are prepared by reacting chlorine- or bromine-containing polysilanes with either a Grignard reagent of general formula R'C?C(CH2)wMgX' where w is an integer from 0 to 3 and X' is chlorine, bromine, or iodine or an organolithium compound of general formula R'C?C(CH2)wLi where w is an integer from 0 to 3. The acetylenic polysilanes can be converted to ceramic materials by pyrolysis at elevated temperatures under an inert atmosphere.
616742
Chandra Grish
Zank Gregg Alan
Dow Corning Corporation
Gowling Lafleur Henderson Llp
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