Organosilicon polymers
AssigneeHercules Incorporated
InventorRaymond T. Leibfried
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Abstract
Novel thermoset and thermoplastic organosilicon polymers, comprised substantially of alternating polycyclic hydrocarbon residues and cyclic polysiloxane or tetrahedral siloxysilane residues linked through carbon-silicon bonds, are disclosed.
Claims17
An organosilicon polymer comprised substantially of alternating polycyclic hydrocarbon residues and cyclic polysiloxane or siloxysilane residues linked through carbon-silicon bonds, said polymer being hydrosilation reaction product of (a) a cyclic polysiloxane or a tetrahedral siloxysilane containing at least two .tbd.SiH groups and (b) a polycyclic polyene having at least two non-aromatic carbon-carbon double bonds in its rings, wherein the ratio of carbon-carbon double bonds in the rings of (b) to .tbd.SiH groups in (a) is in the range of from about 0.5:1 up to about 1.8:1 and at least one of (a) and (b) has more than two reactive sites.
A crosslinked, thermoset organosilicon polymer comprised substantially of alternating polycyclic hydrocarbon residues and cyclic polysiloxane or siloxysilane structure, said polymer being the hydrosilation reaction product of (a) a cyclic polysiloxane or a tetrahedral siloxysilane containing at least two .tbd.SiH groups and (b) a polycyclic polyene having at least two non-aromatic carbon-carbon double bonds in its rings, wherein the ratio of carbon-carbon double bonds in the rings of (b) to .tbd.SiH groups in (a) is in the range of from about 0.7:1 up to about 1.3:1 and at least one of (a) and (b) has more than two reactive sites.
Dependencies are inferred from the claim text.