Organometallic siloxane block copolymers and preparation...

Details Organometallic siloxane block copolymers and preparation... Organometallic siloxane block copolymers and preparation...

C - Chemistry, Metallurgy

08

L

402/11, 400/5317

C08L 83/10 (2006.01) C01B 31/30 (2006.01) C04B 35/571 (2006.01) C08G 77/42 (2006.01) C08G 77/58 (2006.01)

Patent

CA 1151792

Abstract of the Disclosure A process for producing an organometallic copolymer composed of a polycarbosilane portion and a polymetallo- siloxane portion crosslinked with each other, which comprises reacting (1) a polycarbosilane having a main chain skeleton composed mainly of carbosilane units of the formula ?Si-CH2?, with (2) a polymetallosiloxan having a main chain skeleton composed of metalloxane units of the formula ?M-O? wherein M represents Ti or Zr and siloxane units of the formula ?Si-O?, in an organic solvent in an inert atmosphere thereby to bond at least some of the silicon atoms of said polycarbosilane to at least some of the metal atoms M and/or silicon atoms of said polymetallosiloxane through an oxygen atom; and the organometallic copolymer obtained by the aforesaid process.

355008

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