Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1990-10-05
1992-06-02
Hoke, Veronica P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524100, 524102, 524255, 524257, 524258, 524291, 524343, 524349, 524350, 524588, C08K 53435, C08K 518
Patent
active
051187353
ABSTRACT:
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.
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Hercules Incorporated
Hoke Veronica P.
Kuller Mark D.
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