# US 5,364,697 A · Silicon composition, elastic revolution body and fixing device using the composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,364,697 A - Document ID: US5364697A - Status: Granted - Kind: A - Application number: 07/924,582 - Filed: 1992-08-05 - Granted: 1994-11-15 - Earliest claimed: 1988-12-23 - Assignees: Canon Kabushiki Kaisha - Inventors: Toshiyuki Miyabayashi - Web page: https://patentgrep.com/patent/US5364697A ## CPC - G03G 15/2057: {relating to the chemical composition of the heat element and layers thereof} - C08K 9/04: Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)} - C08K 9/06: with silicon-containing compounds - G03G 15/206: {Structural details or chemical composition of the pressure elements and layers thereof} - G03G 2215/2051: Silicone rubber - G03G 2215/2054: Inorganic filler, e.g. silica powder - Y10T 428/1386: Natural or synthetic rubber or rubber-like compound containing - Y10T 428/139: Open-ended, self-supporting conduit, cylinder, or tube-type article - Y10T 428/25: Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles - Y10T 428/259: Silicic material - Y10T 428/269: including synthetic resin or polymer layer or component - Y10T 428/2995: Silane, siloxane or silicone coating - Y10T 428/31663: As siloxane, silicone or silane - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A silicone composition is formed as a system including: a silicone compound, reactive group-containing modified silicic acid powder of which surface has been modified with an alkylsilane, a hexamethyldisilazane, a dimethylsilicone oil, or a mixture thereof, and an unsaturated group-containing silane compound; and inorganic fine powder carrying a surfactant. The silicone compound is preferably an addition reaction-type silicone rubber prepared from a dimethyl polysiloxane having a vinyl group, a methylhydrogenpolysiloxane and a platinum-based catalyst. The silicone composition is heat-cured to provide an elastic revolution body which is suitably used to constitute one or both of a fixing roller and a mating pressure roller in a roller fixing device for electrophotography. ## Claims ### Claim 1 An elastic revolution body comprising an elastic body comprising at least a surface layer thereof formed from a silicon rubber composition, said silicone rubber composition comprising an addition reaction-type silicone rubber composition prepared from a mixture of (A) a dimethylpolysiloxane having a vinyl group, a methylhydrogenpolysiloxane and a platinum-based catalyst, (B) reactive group-containing modified silicic acid powder of which surface has been modified with (i) a compound selected from the group consisting of (a) an alkylsilane, (b) a hexamethyldisilazane, (c) a dimethylsilicone oil and (d) a mixture thereof, and (ii) an unsaturated group-containing silane compound, followed by drying and (C) inorganic fine powder impregnated with a surfactant, said inorganic fine powder having a pore diameter of 0.01 to 30 microns, an average particle size of 5 to 70 microns and an oil absorption of 200-800 ml/100 g, wherein said inorganic fine powder is impregnated with an amount of surfactant sufficient to produce said silicone rubber composition containing surfactant in a proportion of 0.1-10 wt % and wherein said surfactant is a fluorine-containing surfactant selected from the group consisting of fluorinated alkyl esters, perfluoroalkylpolyoxyethylene ethanol, perfluoroalkylcarboxylic acid salts, perfluoroalkylammonium salts, perfluoroalkylbetaine, perfluoroalkylamine oxide, perfluoroalkylethylene oxide adducts, perfluoroalkyl phosphates, non-dissociative perfluoroalkyl compounds and perfluoro-ethylene oxide adducts or a silicone-containing surfactant selected from the group consisting of polyether-modified silicone oil, epoxypolyether-modified silicone oil, alkylaralkylpolyether-modified silicone oil and amino-modified silicone oil. ### Claim 2 (depends on 1) A revolution body according to claim 1, wherein said silicone rubber composition comprises a dimethylpolysiloxane having a vinyl group, methylhydrogenpolysiloxane, a platinum-based catalyst, reactive group-containing modified silicic acid powder and inorganic fine powder impregnated with a surfactant and is heat-cured to provide at least the surface layer of the elastic body. ### Claim 3 (depends on 2) A revolution body according to claim 2, wherein said reactive group-containing modified silicic acid powder has been obtained by treating synthetic silicic acid powder with (i) a compound selected from the group consisting of (a) an alkylsilane, (b) hexamethyldisilazane and (c) a dimethylsilicone and (ii) a vinyl group-containing silane compound, and said inorganic fine powder impregnated with a surfactant comprises inorganic fine powder impregnated with a fluorine-containing surfactant. ### Claim 4 (depends on 2) A revolution body according to claim 2, wherein said synthetic silicic acid has a particle size of 7-100 m.mu. and a BET specific surface area of 40-500 m.sup.2 /g. ### Claim 5 (depends on 2) A revolution body according to claim 2, wherein said reactive group-containing modified silicic acid powder is contained in a proportion of 0.5-20 wt. parts per 100 wt. parts of the addition reaction-type silicone rubber. ### Claim 6 (depends on 2) A revolution body according to claim 2, wherein said reactive group-containing modified silicic acid powder is contained in a proportion of 1-15 wt. parts per 100 wt. parts of the addition reaction-type silicone rubber. ### Claim 7 (depends on 2) A revolution body according to claim 2, wherein said inorganic fine powder impregnated with 100-600 parts by weight of the surfactant per 100 parts by weight of the inorganic fine powder. ### Claim 8 (depends on 2) A revolution body according to claim 2, wherein said inorganic fine powder impregnated with 400-500 parts by weight of the surfactant per 100 parts by weight of the inorganic fine powder. ### Claim 9 (depends on 3) A revolution body according to claim 3, wherein said fluorine-containing surfactant is contained in a proportion of 0.1-10 wt. % with respect to the addition reaction-type silicone rubber. ### Claim 10 (depends on 3) A revolution body according to claim 3, wherein said fluorine-containing surfactant is contained in a proportion of 0.5-5 wt. % with respect to the addition reaction-type silicone rubber. ### Claim 11 (depends on 2) A revolution body according to claim 2, wherein said dimethylpolysiloxane having a vinyl group is represented by at least one of the following two formulas ##STR12## wherein l is a positive integer, or ##STR13## wherein m and n respectively denote a positive integer and k denotes 0 or a positive integer. ### Claim 12 (depends on 11) A revolution body according to claim 11, wherein l denotes an integer of 50-2000 or m+k makes an integer of 50-2000 and n denotes an integer of 1-10. ### Claim 13 (depends on 2) A revolution body according to claim 2, wherein said methylhydrogenpolysiloxane is represented by the formula: ##STR14## wherein p and q respectively denote a positive integer and r denotes 0 or a positive integer. ### Claim 14 (depends on 13) A revolution body according to claim 13, wherein p+r makes an integer of 50-500, and q is an integer of 1-10. ### Claim 15 A fixing device comprising a pair of rollers for passing therebetween a toner-supporting material carrying an unfixed toner image to fix the toner image onto the toner image-supporting material, wherein at least one of said pair of rollers comprises an elastic surface layer formed from a silicone rubber composition wherein, the silicone rubber composition comprises an addition reaction-type silicon rubber composition prepared from a mixture of (A) a dimethylpolysiloxane having a vinyl group, a methylhydrogenpolysiloxane and a platinum-based catalyst, (B) reactive group-containing modified silicic acid powder of which surface has been modified with (i) a compound selected from the group consisting of (a) an alkylsilane, (b) a hexamethyldisilazane, (c) a dimethylsilicone oil and (d) a mixture thereof, and (ii) an unsaturated group-containing silane compound, followed by drying and (C) inorganic fine powder impregnated with a surfactant, said inorganic fine powder having a pore diameter of 0.01 to 30 microns, an average particle size of 5 to 70 microns and an oil absorption of 200-800 ml/100 g, wherein said inorganic fine powder is impregnated with an amount of surfactant sufficient to produce said silicone rubber composition containing surfactant in a proportion of 0.1-10 wt % and wherein said surfactant is a fluorine-containing surfactant selected from the group consisting of fluorinated alkyl esters, perfluoroalkylpolyoxyethylene ethanol, perfluoroalkylcarboxylic acid salts, perfluoroalkylammonium salts, perfluoroalkylbetaine, perfluoroalkylamine oxide, perfluoroalkylethylene oxide adducts, perfluoroalkyl phosphates, non-dissociative perfluoroalkyl compounds and perfluoro-ethylene oxide adducts or a silicone-containing surfactant selected from the group consisting of polyether-modified silicone oil, epoxypolyether-modified silicone oil, alkylaralkylpolyether-modified silicone oil and amino-modified silicone oil. ### Claim 16 (depends on 15) A fixing device according to claim 15, wherein said silicone rubber composition comprises a dimethylpolysiloxane having a vinyl group, methylhydrogenpolysiloxane, a platinum-based catalyst, reactive group-containing modified silicic acid powder and inorganic fine powder impregnated with a surfactant and is heat-cured to provide the elastic surface layer. ### Claim 17 (depends on 16) A fixing device according to claim 16, wherein said reactive group-containing modified silicic acid powder has been obtained by treating synthetic silicic acid powder with (i) a compound selected from the group consisting of (a) an alkylsilane, (b) hexamethyldisilazane and (c) a dimethylsilicone, and (ii) a vinyl group-containing silane compound, and said inorganic fine powder impregnated with a surfactant comprises inorganic fine powder impregnated with a fluorine-containing surfactant. ### Claim 18 (depends on 16) A fixing device according to claim 16, wherein said synthetic silicic acid has a particle size of 7-100 m.mu. and a BET specific surface area of 40-500 m.sup.2 /g. ### Claim 19 (depends on 16) A fixing device according to claim 16, wherein said reactive group-containing modified silicic acid powder is contained in a proportion of 0.5-20 wt. parts per 100 wt. parts of the addition reaction-type silicone rubber. ### Claim 20 (depends on 16) A fixing device according to claim 16, wherein said reactive group-containing modified silicic acid powder is contained in a proportion of 1-15 wt. parts per 100 wt. parts of the addition reaction-type silicone rubber. ### Claim 21 (depends on 16) A fixing device according to claim 16, wherein said inorganic fine powder impregnated with 100-600 parts by weight of the surfactant per 100 parts by weight of the inorganic fine powder. ### Claim 22 (depends on 16) A fixing device according to claim 16, wherein said inorganic fine powder impregnated with 400-500 parts by weight of the surfactant per 100 parts by weight of the inorganic fine powder. ### Claim 23 (depends on 17) A fixing device according to claim 17, wherein said fluorine-containing surfactant is contained in a proportion of 0.1-10 wt. % with respect to the addition reaction-type silicone rubber. ### Claim 24 (depends on 17) A fixing device according to claim 17, wherein said fluorine-containing surfactant is contained in a proportion of 0.5-5 wt. % with respect to the addition reaction-type silicone rubber. ### Claim 25 (depends on 16) A fixing device according to claim 16, wherein said dimethylpolysiloxane having a vinyl group is represented by at least one of the following two formulas ##STR15## wherein l is a positive integer, or ##STR16## wherein m and n respectively denote a positive integer and k denotes 0 or a positive integer. ### Claim 26 (depends on 25) A fixing device according to claim 25, wherein l denotes an integer of 50-2000 or m+k makes an integer of 50-2000 and n denotes an integer of 1-10. ### Claim 27 (depends on 16) A fixing device according to claim 16, wherein said methylhydrogenpolysiloxane is represented by the formula: ##STR17## wherein p and q respectively denote a positive integer and r denotes 0 or a positive integer. ### Claim 28 (depends on 27) A fixing device according to claim 27, wherein p+r makes an integer of 50-500, and q is an integer of 1-10. ### Claim 29 (depends on 15) A fixing device according to claim 15, wherein said pair of rollers comprises a pressing roller and a heating roller. ### Claim 30 (depends on 29) A fixing device according to claim 29, wherein said pressing roller is provided with a conducting means for grounding. ### Claim 31 (depends on 29) A fixing device according to claim 29, wherein said heating roller is equipped with a heater disposed inside thereof.