CNT/fluoropolymer coating composition
First Claim
1. A coated article comprising:
- a substrate, anda coated layer disposed over the substrate and formed from a coating composition applied on the substrate, the coated layer having a thickness ranging from about 5 microns to about 20 microns, wherein the coating composition comprises;
a polyfluoroalkoxypolytetrafluorethylene fluoropolymer;
a plurality of nanotubes dispersed in a media; and
a stabilizer mixed with the fluoropolymer and the plurality of nanotubes in the media, the stabilizer being a partially neutralized polyallylamine polymer comprising i) an amino substituent and ii) an ammonium ion substituent or salt thereof at a pH value ranging from 5 to 9, the stabilizer allowing a stable dispersion of the plurality of nanotubes in the media and in the fluoropolymer, the stabilizer having a molecular weight ranging from 300 to about 100,000,wherein the coated article is one of a fuser roll, a fixing roll, a pressure roller, and a release agent donor roll for an electrostatographic device.
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Abstract
Exemplary embodiments provide nanotube-containing coating compositions and methods for making and using the coating compositions. In an exemplary embodiment, the coating composition can include a plurality of nanotubes (e.g., carbon nanotubes (CNTs)) dispersed stably and uniformly in a polymer matrix containing fluoropolymers. The coating composition can further include stabilizers to allow a stable and/or uniform dispersion of the plurality of nanotubes in the fluoropolymers. The nanotube coating composition can be coated on an article surface to improve mechanical robustness, and electrical and thermal conductivity of the coated article. The coated article can be used as, for example, a fuser member, a fixing member, a pressure roller, or a release agent donor member in an electrostatographic printing machine or process.
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Citations
23 Claims
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1. A coated article comprising:
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a substrate, and a coated layer disposed over the substrate and formed from a coating composition applied on the substrate, the coated layer having a thickness ranging from about 5 microns to about 20 microns, wherein the coating composition comprises; a polyfluoroalkoxypolytetrafluorethylene fluoropolymer; a plurality of nanotubes dispersed in a media; and a stabilizer mixed with the fluoropolymer and the plurality of nanotubes in the media, the stabilizer being a partially neutralized polyallylamine polymer comprising i) an amino substituent and ii) an ammonium ion substituent or salt thereof at a pH value ranging from 5 to 9, the stabilizer allowing a stable dispersion of the plurality of nanotubes in the media and in the fluoropolymer, the stabilizer having a molecular weight ranging from 300 to about 100,000, wherein the coated article is one of a fuser roll, a fixing roll, a pressure roller, and a release agent donor roll for an electrostatographic device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A coated article comprising:
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a substrate, and a coated layer disposed over the substrate and formed from a coating composition applied on the substrate, wherein the coating composition comprises a polyfluoroalkoxypolytetrafluorethylene fluoropolymer, a plurality of nanotubes dispersed in a media, and a stabilizer mixed with the fluoropolymer and the plurality of nanotubes in the media, the stabilizer being a partially neutralized polyallylamine polymer comprising i) an amino substituent and ii) an ammonium ion substituent or salt thereof at a pH value of 5 to 9, the stabilizer allowing a stable dispersion of the plurality of nanotubes in the media and in the fluoropolymer, wherein the fluoropolymer comprises a mixture of a plurality of small fluoropolymer particles, having an average small particle size ranging from about 50 nanometers to about 500 nanometers, and a plurality of large fluoropolymer particles, having an average large particle size ranging from about 1 micrometer to about 50 micrometers, wherein the coated layer has a thickness ranging from about 5 microns to about 20 microns, and wherein the coated article is one of a fuser roll, a fixing roll, a pressure roller, and a release agent donor roll for an electrostatographic device. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A coated article comprising:
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a substrate, and a coated layer disposed over the substrate and formed from a coating composition applied on the substrate, the coated layer having a thickness ranging from about 5 microns to about 20 microns, wherein the coating composition comprises; a polyfluoroalkoxypolytetrafluorethylene fluoropolymer; a plurality of nanotubes dispersed in a media; and a stabilizer mixed with the fluoropolymer and the plurality of nanotubes in the media, the stabilizer being a partially neutralized polyallylamine comprising i) an amino substituent and ii) an ammonium ion substituent or salt thereof at a pH value ranging from 5 to 9, the stabilizer allowing a stable dispersion of the plurality of nanotubes in the media and in the fluoropolymer, wherein the coated article is one of a fuser roll, a fixing roll, a pressure roller, and a release agent donor roll for an electrostatographic device. - View Dependent Claims (21, 22, 23)
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Specification