# US 8,465,838 B2 · Polyimide-alkylphosphate fuser member > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,838 B2 - Document ID: US8465838B2 - Status: Granted - Kind: B2 - Application number: 13/020,453 - Filed: 2011-02-03 - Published: 2012-08-09 - Granted: 2013-06-18 - Earliest claimed: 2011-02-03 - Assignees: Xerox Corporation - Applicants: Jin Wu - Inventors: Jin Wu - Web page: https://patentgrep.com/patent/US8465838B2 ## CPC - G03G 15/2057: {relating to the chemical composition of the heat element and layers thereof} - B32B 25/08: of synthetic resin - C08K 5/0091: {Complexes with metal-heteroatom-bonds} - C08K 5/5398: Phosphorus bound to sulfur - C08L 79/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors - C08L 83/10: Block- or graft-copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00) - C08L 83/12: containing polyether sequences - Y10T 428/3154: Of fluorinated addition polymer from unsaturated monomers - Y10T 428/31663: As siloxane, silicone or silane - Y10T 428/31721: Of polyimide - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - 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 an alkylthiophosphate. ## Claims ### Claim 1 A fuser member comprising: a substrate layer comprising a polyimide polymer and an alkylthiophosphate a cushioning layer disposed on the substrate layer; and a release layer disposed on the cushioning layer. ### Claim 2 (depends on 1) The fuser member of claim 1 wherein the alkylthiophosphate comprises a metal dialkyldithiophosphate and the metal is selected from the group consisting of zinc, molybdenum, lead, manganese, antimony and mixtures thereof. ### Claim 3 (depends on 1) The fuser member of claim 1 wherein the alkylthiophosphate is selected from the group consisting of; wherein R1, R2, R3, R4, R5 and R6 each independently represents a hydrogen atom; alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl and at least one of R1, R2, R3, R4, R5 and R6 represents an alkyl containing group. ### Claim 4 (depends on 3) A fuser member of claim 3 wherein R1, R2, R3, R4, R5 and R6 each independently represents alkyl containing from 1 carbon atom to about 20 carbon atoms; cycloalkyl containing from 6 carbon atoms to about 26 carbon atoms; aryl, alkylaryl or arylalkyl each containing from about 6 carbon atoms to about 50 carbon atoms; or optionally a hydrocarbyl group. ### Claim 5 (depends on 1) A fuser member of claim 1 wherein the alkylthiophosphate comprises a zinc dialkyldithiophosphate, and wherein said alkyl is a straight chain or branched alkyl with from about 2 carbon atoms to about 18 carbon atoms. ### Claim 6 (depends on 1) The fuser member of claim 1 wherein the substrate layer further comprises a polysiloxane polymer. ### Claim 7 (depends on 6) The fuser member of claim 6 wherein the polysiloxane polymer is 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 8 (depends on 1) The fuser member of claim 1 wherein the polyimide and the alkylthiophosphate are present in a weight ratio of about 99.9/0.1 to about 95/5. ### Claim 9 (depends on 6) The fuser member of claim 6 wherein the polyimide, the alkylthiophosphate and the polysiloxane polymer are present in a weight ratio of about 99.89/0.09/0.01 to about 95/4/1. ### Claim 10 (depends on 1) The fuser member of claim 1 wherein the substrate layer further comprises fillers. ### Claim 11 (depends on 10) The fuser member of claim 10 wherein the fillers are selected from the group consisting of aluminum nitride, boron nitride, aluminum oxide, graphite, graphene, copper flake, nano diamond, carbon black, carbon nanotubes, metal oxides, doped metal oxide, metal flake, and mixtures thereof. ### Claim 12 (depends on 1) The fuser member of claim 1 wherein the cushioning layer comprises silicone. ### Claim 13 (depends on 1) The fuser member of claim 1 wherein the release layer comprises a fluoropolymer. ### Claim 14 A fuser member comprising: a substrate layer comprising a polyimide polymer and an alkylthiophosphate; 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 15 (depends on 14) The fuser member of claim 14 wherein the release layer further comprises fillers selected from the group consisting of aluminum nitride, boron nitride, aluminum oxide, graphite, graphene, copper flake, nano diamond, carbon black, carbon nanotube, metal oxides, doped metal oxide, metal flake, and mixtures thereof; and wherein the fluoropolymer comprises a fluoroelastomer or a fluoroplastic. ### Claim 16 (depends on 14) The fuser member of claim 14 further comprising: an adhesive layer disposed on the intermediate layer or the substrate layer.