C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
400/108, 400/410
C08K 5/00 (2006.01) C08L 83/04 (2006.01) G03G 5/00 (2006.01) G03G 15/20 (2006.01)
Patent
CA 1276328
ABSTRACT OF THE DISCLOSURE A silicone composition curable to a heat stabilized silicone elastomer comprising at least one polyorganosiloxane having the formula: Image where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and B may be any of methyl, hydroxy or vinyl groups, 0 < ? ? 1 and m + n > 350, a complex comprising a transition metal salt of at least one polydentate transition metal chelating ligand having the formula: Image where each R1 may be any of alkyl having 1 to 6 carbon atoms, or an aryl moiety having less than 19 carbon atoms, R'1 is an X' substituted R1, as defined, each of Z, Y and X' may be any of carboxy or substituted or unsubstituted nitrogen or sulfur or arsenic, X is substituted or unsubstituted nitrogen or sulfur or arsenic and p is 0 to 4, present in the composition in an amount sufficient to inhibit oxidative degradation of the polyorganosiloxane and a finely divided filler and effective amounts of crosslinking agent and catalyst. The complex may be predispersed in a polyorganosiloxane oil having a viscosity within a range of to 50 to 100,000 centistokes. In a preferred embodiment for use in an electrostatographic reproducing machine a fuser member is made with an addition curable polyorganosiloxane and the complex is bis (ethylene diamine) copper (II) sulfate initially predispersed in a low viscosity silicone oil and subsequently dispersed in a higher viscosity silicone oil.
510416
Heeks George J.
Henry Arnold W.
Schlueter Edward L. Jr.
Sim & Mcburney
Xerox Corporation
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