Fluoroelastomer containing intermediate transfer members
View Patent ↗An intermediate transfer member that includes a core shell component wherein the core is, for example, comprised of a metal oxide, and the shell is comprised of a silica, which shell contains or includes a hydrophobic agent, and where the core shell is dispersed in or mixed with a fluoroelastomer.
1. An intermediate transfer member consisting of and in sequence, a supporting substrate, an adhesive layer, and thereover a layer consisting of a conductive component a core shell component dispersed in a fluoroelastomer, and wherein the core consists of titanium oxide and the shell consists of silica chemically modified with a trialkyl-N-(trialkylsilyl)-silanamine, wherein said core shell component is present in an amount of from about 1 to about 60 percent by weight based on the weight of total solids, and said fluoroelastomer is present in an amount of from about 99 to about 40 percent by weight, and wherein said member accepts a xerographic developed image from a photoconductor, and wherein said developed image is subsequently transferred to a substrate.
2. An intermediate transfer member in accordance with claim 1 wherein said trialkyl-N-(trialkylsilyl)-silanamine is 1,1,1-trimethyl-N-(trimethylsilyl)-silanamine.
3. An intermediate transfer member in accordance with claim 1 wherein said trialky-N-(trialkylsilyl)-silanamine is selected from the group consisting of hexamethyldisilazane, 2,2,4,4,6,6-hexamethylcyclotrisilazane, 1,3-diethyl-1,1,3,3-tetramethyldisilazane, 1,1,3,3-tetramethyl-1,3-diphenyldisilazane, 1,3-dimethyl-1,1,3,3-tetraphenyl disilazane, and mixtures thereof.
4. An intermediate transfer member in accordance with claim 1 wherein said core shell component possesses a B.E.T. surface area of from about 10 to about 200 m 2 /g.
5. An intermediate transfer member in accordance with claim 1 wherein said core shell component possesses a B.E.T. surface area of from about 30 to about 100 m2/g.
6. An intermediate transfer member in accordance with claim 1 wherein said core shell component is present in an amount of from about 20 to about 40 percent by weight based on the weight of total solids, and said fluoroelastomer is present in an amount of from about 80 to about 60 percent by weight.
7. An intermediate transfer member in accordance with claim 1 wherein said fluoroelastomer is a copolymer of vinylidene fluoride and hexafluoropropylene, a terpolymer of vinylidene fluoride, hexafluoropropylene, and tetrafluoroethylene, or a tetrapolymer of vinylidene fluoride, hexafluoropropylene, tetrafluoroethylene and a cure site monomer.
8. An intermediate transfer member in accordance with claim 7 wherein said cure site monomer is selected from the group consisting of 4-bromoperfluorobutene-1, 1,1-dihydro-4-bromoperfluorobutene-1, 3-bromoperfluoro propene-1, 1,1-dihydro-3-bromoperfluoropropene-1, and mixtures thereof.
9. An intermediate transfer member in accordance with claim 1 wherein said fluoroelastomer consists of a tetrapotymer of vinylidene fluoride, hexafluoropropylene, tetrafluoroethylene, and a cure site monomer of 4-bromoperfluorobutene-1, 1,1-dihydro-4-bromoperfluorobutene-1, 3-bromoperfluoro propene-1, or 1,1-dihydro-3-bromoperfluoropropene-1, and wherein said vinylidene fluoride is present in an amount of from about 25 to about 45 mole percent; said hexafluoropropylene is present in an amount of from about 24 to about 44 mole percent; said tetrafluoroethylene is present in an amount of from about 19 to about 39 mole percent, and said cure site monomer is present in an amount of from about 0.5 to about 5 mole percent, and the total thereof of said components is about 100 percent.
10. An intermediate transfer member in accordance with claim 1 said core shell is of a diameter of from about 5 to about 1,000 nanometers.
11. An intermediate transfer member in accordance with claim 1 wherein said conductive component is at least one of a polyaniline, a carbon black, a metal oxide, and mixtures thereof, each present in an amount of from about 1 to about 60 percent by weight based on the weight of total solids.
12. An intermediate transfer member in accordance with claim 1 wherein said member has a surface resistivity of from about 10 8 to about 10 13 ohm/sq.
13. An intermediate transfer member in accordance with claim 12 wherein said surface resistivity is from about 10 10 to about 10 12 ohm/sq.
14. An intermediate transfer member in accordance with claim 1 wherein said member has a circumference of from about 250 to about 2,500 millimeters.
15. An intermediate transfer member in accordance with claim 1 wherein said core is present in an amount of from about 50 to about 99 weight percent, and said shell is present in an amount of from about 1 to about 50 weight percent of said core shell component.
16. An intermediate transfer member in accordance with claim 1 wherein said core is present in an amount of from about 70 to about 90 weight percent, and said shell is present in an amount of from about 10 to about 30 weight percent of said core shell component, and wherein said trialkyl-N-(trialkylsilyl)-silanamine is 1,1,1-trimethyl-N-(trimethylsilyl)-silanamine.
17. An intermediate transfer member in accordance with claim 16 wherein said 1,1,1-trimethyl-N-(trimethylsilyl)-silanamine is present in an amount of from about 1 to about 20 weight percent.
18. A hydrophobic intermediate transfer member connected to a photoconductor wherein said member consists of, in sequence, a supporting substrate, an adhesive layer, and thereover a layer which consists of a core shell component of a titanium oxide core with a silica shell thereover wherein said core shell is contained in a fluoroelastomer, and wherein said shell consists of said silica and a trialkyl-N-(trialkylsilyl)-silanamine selected from the group consisting of 1,1,1-trimethyl-N-(trimethylsilyl)-silanamine, hexamethyldisilazane, 2,2,4,4,6,6-hexamethylcyclotrisilazane, 1,3-diethyl-1,1,3, 3-tetramethyldisilazane, 1,1,3,3-tetramethyl-1,3-diphenyldisilazane, and 1,3-dimethyl-1,1,3,3-tetraphenyl disilazane and wherein said member accepts a xerographic developed image from said photoconductor, and wherein said developed image is subsequently transferred to a document.
19. An intermediate transfer member in accordance with claim 18 wherein said trialkyl-N-(trialkylsilyl)-silanamine is 1,1-trimethyl-N-(trimethylsilyl)-silanamine, and said fluoroelastomer is a copolymer of vinylidene fluoride and hexafluoropropylene, a terpolymer of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene, or a tetrapolymer of vinylidene fluoride, hexafluoropropylene, tetrafluoroethylene, and a cure site monomer of 4-bromoperfluorobutene-1, 1,1-dihydro-4-bromoperfluorobutene-1, 3-bromoperfluoro propene-1, or 1,1-dihydro-3-bromoperfluoropropene-1.
20. An intermediate transfer belt consisting essentially of a supporting substrate having deposited thereon a mixture of a fluoroelastomer, and a core shell component of a titanium oxide core with a silica shell thereover and wherein said shell includes 1,1,1-trimethyl-N-(trimethylsilyl)-silanamine, and wherein said fluoroelastomer is a copolymer of vinylidene fluoride and hexafluoropropylene, a terpolymer of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene, or a tetrapolymer of vinylidene fluoride, hexafluoropropylene, tetrafluoroethylene, and a cure site monomer of 4-bromoperfluorobutene-1, 1,1-dihydro-4-bromoperfluorobutene-1, 3-bromoperfluoropropene-1, or 1,1-dihydro-3-bromoperfluoropropene-1 and an adhesive layer situated between said supporting substrate and said core shell, said core shell being of a particle size diameter of from about 10 to about 200 nanometers, and wherein said member accepts a xerographic developed image from a photoconductor, and wherein said developed image is subsequently transferred to a substrate.