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A silicone composition curable to a heat stabilized silicone elastomer comprising at least one polyorganosiloxane having the formula: [Figure] where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and D may be any of methyl, hydroxy or

A silicone composition curable to a heat stabilized silicone elastomer comprising at least one polyorganosiloxane having the formula: [Figure] where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and D may be any of methyl, hydroxy or vinyl groups, 0350, a complex comprising a transition metal salt of at least one polydentate chelating ligand having the formula: [Figure] where each R1 may be an alkyl biradical having 1 to 6 carbon atoms or an aryl biradical having less than 19 carbon, atoms R′1, is an X′substituted R1, each of Z and E may be any of carboxy thiocarboxy, dithiocarboxy, or －N(R2)2, －As(R2)2, －S(R2) where each R2 may be any of hydrogen or an alkyl radical having 1 to 6 carbon atoms or any aryl radical having less than 19 carbon atoms, X′may be any of hydrogen, carboxy, thiocarboxy, dithiocarboxy, －N(R2)2, －As(R2)2, or －S(R2), X is －N(R2)－, －As(R2)－, or －S－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.

대표청구항 ▼

A fuser member for use in an electrostatographic reproducing machine comprising a rigid base and a thin deformable layer of a composition coated thereon comprising the crosslinked product of a mixture of about; (a) 100 parts by weight of at least one polyorganosiloxane having the Formula “a”: [Figur

A fuser member for use in an electrostatographic reproducing machine comprising a rigid base and a thin deformable layer of a composition coated thereon comprising the crosslinked product of a mixture of about; (a) 100 parts by weight of at least one polyorganosiloxane having the Formula “a”: [Figure] where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and D may be any of methyl, hydroxyl or vinyl groups, 01 and m+n>350, (b) a complex comprising a transition metal sulfate, nitrate, phosphate, halide, acetate, carboxylate, nitrite or perfluoroborate and at least one polydentate chelating ligand of the formula [Figure] where each R1 may be an alkyl biradical having 1 to 6 carbon atoms or an aryl biradical having less than 19 carbon atoms, R′1 is an X′substituted R1, each of Z and E may be any of carboxy, thiocarboxy, dithiocarboxy, －N(R2)2, －As(R2)2, or －S(R2) where each R2 may be any of hydrogen or an alkyl radical having 1 to 6 carbon atoms or an aryl radical having less than 19 carbon atoms, X′may be any of hydrogen, carboxy, thiocarboxy, dithiocarboxy, －N(R2)2, －As(R2)2, or －S(R2), X is －N(R2)－, p is 0 to 4, said complex being present in an amount sufficient to inhibit oxidative degradation of said polyorganosiloxane said complex being predispersed in a polyorganosiloxane oil or blend of polyorganosiloxane oils of the formula: [Figure] where R′is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A′and D′may be any of methyl, hydroxy or vinyl groups, R′, A′and D′being selected to minimize reaction with R, A or D in the formula in “a”to minimize the formation of a crosslinked product therebetween, 01 and 82000, said oil or blend of oils having a viscosity within the range from about 50 centistokes to 100,000 centistokes and being present in an amount of from about 5 to 100 parts per 100 parts of “a”, (c) from about 5 to about 500 parts by weight of finely divided fillers, and (d) a further crosslinking agent and a crosslinking catalyst, said crosslinking agent and catalyst being present in an amount sufficient to promote crosslinking of said at least one polyorganosiloxane.