Hercules Corporation

Julia S Burnier

John K Bard

A composition comprising (A) (i) a crosslinked organosilicon polymer or crosslinkable organosilicon prepolymer comprising 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 more than two reactive sites; or (ii) a crosslinked or crosslinkable linear poly(organohydrosiloxane) polymer having at least 30% of its .tbd.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; and (B) as an antioxidant, (i) at least one compound containing a hindered phenol substituent and (ii) at least one compound containing a substituent selected from the group consisting of hindered amines and aromatic amines; and the process of making the same, are disclosed.

Organosilicon composition comprising stabilizers

A crosslinkable organosilicon prepolymer and a crosslinked organosilicon polymer comprising alternating hydrocarbon and cyclic polysiloxane radicals, which is the hydrosilation reaction product of:

Organosilicon materials

A composition comprising (A) (i) a crosslinked organosilicon polymer or crosslinkable organosilicon prepolymer comprising alternating (a) cyclic polysiloxane or tetrahedral siloxysilane residues and (b) polycyclic hydrocarbon residues derived from polycyclic polyenes having at least two 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 more than two reactive sites; or (ii) a crosslinked or crosslinkable linear poly(organohydrosiloxane) polymer having a least 30% of its .tbd.SiH groups reacted to hydrocarbon residues derived from polycyclic polyenes having at least two carbon-carbon double bonds in their rings; and (B) as an antioxidant, a compound comprised of at least one hindered phenol and at least one hindered amine; and the process of making the same, are disclosed.

Organosilicon composition comprising stabilizer

This invention is directed to a prepreg which comprises fiber reinforcement impregnated with the partial hydrosilation reaction product of:

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Wilmington, DE, United States of America

Julia S Burnier