Organosilicon polymers and prepolymers comprising a coupling...

Details Organosilicon polymers and prepolymers comprising a coupling... Organosilicon polymers and prepolymers comprising a coupling...

C - Chemistry, Metallurgy

08

F

C08F 283/12 (2006.01) C08G 77/04 (2006.01) C08G 77/50 (2006.01) C08L 83/14 (2006.01)

Patent

CA 2058586

Leibfried and Woodside Case 1 ORGANOSILICON POLYMERS AND PREPOLYMERS COMPRISING A COUPLING MONOMER Abstract of the Invention Crosslinked or crosslinkable organosilicon polymers and prepolymers comprising either (i) alternating (a) cyclic polysiloxane or tetrahedral siloxysilane residues and (b) polycyclic hydrocarbon residues derived from polycyclic polyenes having at least two non-aromatic, non-conjugated carbon-carbon double bonds in their rings linked through carbon to silicon bonds, wherein at least one of the cyclic polysiloxanes or tetrahedral siloxysilanes (a) or the polycyclic polyenes (b) used to form the polymer or prepolymer has three or more reactive sites; or (ii) a linear poly(organohydrosiloxane) polymer having at least 30% of its ?SiH groups reacted to hydrocarbon residues derived from polycyclic polyenes having at least two non-aromatic, non-conjugated carbon-carbon double bonds in their rings; characterized in that the polymer or prepolymer further comprises a coupling monomer having at least one carbon-carbon double bond which reacts with SiH during hydrosilation.

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