Organosilicon materials

Details Organosilicon materials Organosilicon materials

C - Chemistry, Metallurgy

08

J

117/187, 117/113

C08J 5/24 (2006.01) B32B 15/08 (2006.01) C08G 77/50 (2006.01) C08L 83/14 (2006.01) H05K 3/46 (2006.01) H05K 1/03 (2006.01)

Patent

CA 2027696

008p (FF) Bard & Burnier Case l(FF) Abstract of the Disclosure A process for preparing a prepreg that comprises reacting a polycyclic polyene comprising dicyclopentadiene with a cyclic polysiloxane having three or more hydrogen atoms bound to silicon, and the polyene and the polysiloxane are reacted with a chain extender comprising at least one polyene having at least two non-aromatic, non-conjugated carbon-carbon double bonds highly reactive in hydrosilation to produce a prepolymer comprising a polycyclic polyene residue and a cyclic polysiloxane residue linked through carbon-silicon bonds, and the reaction is continued until the prepolymer has a viscosity of 300 to 3,000 centipoise at 100°C and has 65% to about 75% of the available ?SiH groups of the cyclic polysiloxane reacted, impregnating a fiber reinforcing material with the prepolymer, and heating the impregnated material to cure the prepolymer.

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