# US 8,541,108 B2 · Fuser member > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,541,108 B2 - Document ID: US8541108B2 - Status: Granted - Kind: B2 - Application number: 12/890,933 - Filed: 2010-09-27 - Published: 2012-03-29 - Granted: 2013-09-24 - Earliest claimed: 2010-09-27 - Assignees: Xerox Corporation - Applicants: Jin Wu - Inventors: Jin Wu - Web page: https://patentgrep.com/patent/US8541108B2 ## CPC - G03G 15/2053: {Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating} - Y10T 428/31721: Of polyimide - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present teachings provide a fuser member. The fuser member includes a substrate layer comprising a polyimide polymer and a hydroxyl terminated polybutadiene. A method of manufacturing a fuser member containing a polyimide polymer and a hydroxyl terminated polybutadiene is presented. ## Claims ### Claim 1 A fuser member comprising: a substrate layer comprising a polyimide polymer formed from a reaction between a polyamic acid and a hydroxyl terminated polybutadiene, wherein the polyamic acid is selected from the group consisting of pyromellitic dianhydride/4,4′-oxydianiline, pyromellitic dianhydride/phenylenediamine, biphenyl tetracarboxylic dianhydride/4,4′-oxydianiline, biphenyl tetracarboxylic dianhydride/phenylenediamine, benzophenone tetracarboxylic dianhydride/4,4′-oxydianiline and benzophenone tetracarboxylic dianhydride/4,4′-oxydianiline/phenylenediamine, wherein the polyimide polymer and the hydroxyl terminated polybutadiene are present in a weight ratio of about 99.9 /0.1 to about 99/5 and wherein the polybutadiene crosslinks with the polyimide polymer. ### Claim 2 (depends on 1) The fuser member of claim 1 wherein the substrate layer further comprises a polysiloxane polymer selected from the group consisting of a polyester modified polydimethylsiloxane, a polyether modified polydimethylsiloxane, a polyacrylate modified polydimethylsiloxane, and a polyester polyether modified polydimethylsiloxane. ### Claim 3 (depends on 1) The fuser member of claim 1 wherein the substrate layer comprises a modulus of greater than about 7000 MPa. ### Claim 4 (depends on 1) The fuser member of claim 1 wherein the substrate layer comprises an onset decomposition temperature of greater than about 550° C. ### Claim 5 (depends on 1) The fuser member of claim 1 wherein the substrate layer further comprises fillers. ### Claim 6 (depends on 5) The fuser member of claim 5 wherein the fillers are selected from the group consisting of carbon blacks, carbon nanotubes, metal oxides, doped metal oxides, polyanilines, polythiophenes, polyacetylene, poly(p-phenylene vinylene), poly(p-phenylene sulfide), pyrroles, polyindole, polypyrene, polycarbazole, polyazulene, polyazepine, poly(fluorine), polynaphthalene, salts of organic sulfonic acid, esters of phosphoric acid, esters of fatty acids, ammonium or phosphonium salts, and mixtures thereof. ### Claim 7 (depends on 1) The fuser member of claim 1 further comprising: an intermediate layer disposed on the substrate layer; and a release layer disposed on the intermediate layer. ### Claim 8 (depends on 7) The fuser member of claim 7 wherein the intermediate layer comprises silicone. ### Claim 9 (depends on 7) The fuser member of claim 7 wherein the release layer comprises a fluoropolymer. ### Claim 10 (depends on 7) The fuser member of claim 7 wherein the release layer comprises thickness of from about 10 microns to about 100 microns. ### Claim 11 A fuser member comprising: a substrate layer comprising a polyimide polymer formed from a reaction between a polyamic acid and a hydroxyl terminated polybutadiene, wherein the polyamic acid is selected from the group consisting of pyromellitic dianhydride/4,4′-oxydianiline, pyromellitic dianhydride/phenylenediamine, biphenyl tetracarboxylic dianhydride/4,4′-oxydianiline, biphenyl tetracarboxylic dianhydride/phenylenediamine, benzophenone tetracarboxylic dianhydride/4,4′-oxydianiline and benzophenone tetracarboxylic dianhydride/4,4′-oxydianiline/phenylenediamine, wherein the polyimide polymer and the hydroxyl terminated polybutadiene are present in a weight ratio of about 99.9 /0.1 to about 99/5 and wherein the polybutadiene crosslinks with the polyimide polymer; an intermediate layer comprising a material selected from the group consisting of silicone and fluoroelastomer; and a release layer disposed on the intermediate layer comprising a fluoropolymer. ### Claim 12 (depends on 11) The fuser member of claim 11 wherein the release layer further comprises fillers. ### Claim 13 (depends on 12) The fuser member of claim 12 wherein the fillers are selected from the group consisting of carbon blacks, carbon nanotubes, metal oxides, doped metal oxides, polyanilines, polythiophenes, polyacetylene, poly(p-phenylene vinylene), poly(p-phenylene sulfide), pyrroles, polyindole, polypyrene, polycarbazole, polyazulene, polyazepine, poly(fluorine), polynaphthalene, salts of organic sulfonic acid, esters of phosphoric acid, esters of fatty acids, ammonium or phosphonium salts, and mixtures thereof; and wherein the fluoropolymer comprises a fluoroelastomer or a fluoroplastic. ### Claim 14 (depends on 11) The fuser member of claim 11 further comprising: an adhesive layer disposed on the intermediate layer or the substrate layer. ### Claim 15 A method of forming a fuser belt suitable for use with an image forming system, comprising: flow coating a composition of a polyamic acid and a hydroxyl terminated polybutadiene, wherein the polyamic acid is selected from the group consisting of pyromellitic dianhydride/4,4′-oxydianiline, pyromellitic dianhydride/phenylenediamine, biphenyl tetracarboxylic dianhydride/4,4′-oxydianiline, biphenyl tetracarboxylic dianhydride/phenylenediamine, benzophenone tetracarboxylic dianhydride/4,4′-oxydianiline and benzophenone tetracarboxylic dianhydride/4,4′-oxydianiline/phenylenediamine, and a solvent onto an outer surface of a rotating substrate; reacting the polyamic acid and the hydroxyl terminated polybutadiene at a temperature of from about 125° C. to about 190° C. for a time of from about 30 to about 90 minutes to form a belt comprising a partially cured polyimide polymer crosslinked with polybutadiene wherein the polyimide polymer and the hydroxyl terminated polybutadiene are present in a weight ratio of about 99.9 /0.1 to about 99/5; removing the partially cured belt from the rotating substrate; and tensioning and rotating the partially cured belt at a temperature of from about 250° C. to about 370° C. for a time of from about 30 to about 150 minutes to fully cure the belt. ### Claim 16 (depends on 15) The method of claim 15 wherein the solvent is selected from the group consisting of tetrahydrofuran, methyl ethyl ketone, methyl isobutyl ketone, N,N′-dimethylformamide, N,N′-dimethylacetamide, N-methylpyrrolidone and methylene chloride. ### Claim 17 (depends on 15) The method of claim 15 further comprising: coating an intermediate layer on an outer layer of the cured belt, and said intermediate layer comprises silicone. ### Claim 18 (depends on 17) The method of claim 17 further comprising: coating a release layer on the intermediate layer, and said release layer comprises fillers and a fluoropolymer. ### Claim 19 (depends on 18) The method of claim 18 wherein the fillers are selected from the group consisting of carbon blacks, carbon nanotubes, metal oxides, doped metal oxides, polyanilines, polythiophenes, polyacetylene, poly(p-phenylene vinylene), poly(p-phenylene sulfide), pyrroles, polyindole, polypyrene, polycarbazole, polyazulene, polyazepine, poly(fluorine), polynaphthalene, salts of organic sulfonic acid, esters of phosphoric acid, esters of fatty acids, ammonium or phosphonium salts, and mixtures thereof; and wherein the fluoropolymer comprises a fluoroelastomer or a fluoroplastic.