# US 2022/0035264 A1 · Electrophotographic developer set including toner and powder adhesive, and method for producing bonded product > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0035264 A1 - Document ID: US20220035264A1 - Status: Published application - Kind: A1 - Application number: 17/385,137 - Filed: 2021-07-26 - Published: 2022-02-03 - Earliest claimed: 2020-07-31 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Shohei Yamashita; Yuhei Terui; Koji Nishikawa; Tsutomu Shimano; Kohei Matsuda; Yuki Nishizawa - Web page: https://patentgrep.com/patent/US20220035264A1 ## CPC - G03G 9/113: having coatings applied thereto - G03G 9/08711: {with esters of acrylic or methacrylic acid} - G03G 9/08782: {Waxes} - G03G 9/08795: {characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants} - G03G 9/08797: {characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature} - G03G 15/0126: {using a solid developer} - G03G 15/0822: {Arrangements for preparing, mixing, supplying or dispensing developer} - G03G 2215/00835: Toner binding - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract Provided is an electrophotographic developer set having a toner and a powder adhesive, wherein the toner comprises a thermoplastic resin A; the powder adhesive comprises a thermoplastic resin B and a wax A; the wax A has two or more ester groups in the molecule; the thermoplastic resin B has an ester group; and in a viscoelasticity measurement, with Gt′(100) (Pa) being a storage elastic modulus at 100° C. of the toner, and Gb′(100) (Pa) being a storage elastic modulus at 100° C. of the powder adhesive, Gb′(100) is 1.00×105 Pa or less, and Gt′(100)/Gb′(100) is 1.20 or more, as well as a method for producing a bonded product using the above electrophotographic developer set. ## Claims ### Claim 1 An electrophotographic developer set comprising a toner, and a powder adhesive, wherein the toner comprises a thermoplastic resin A, the powder adhesive comprises a thermoplastic resin B and a wax A, the wax A has two or more ester groups in a molecule, the thermoplastic resin B has an ester group, and in a viscoelasticity measurement, with Gt′(100) (Pa) being a storage elastic modulus at 100° C. of the toner, and Gb′(100) (Pa) being a storage elastic modulus at 100° C. of the powder adhesive, Gb′(100) is 1.00×105 Pa or less, and Gt′(100)/Gb′(100) is 1.20 or more. ### Claim 2 (depends on 1) The electrophotographic developer set according to claim 1, wherein the Gt′(100)/Gb′(100) is 2.00 to 30.00. ### Claim 3 (depends on 1) The electrophotographic developer set according to claim 1, wherein the wax A has molecular weight of 300 to 1000. ### Claim 4 (depends on 1) The electrophotographic developer set according to claim 1, wherein the wax A comprises at least one selected from the group consisting of an ester wax represented by Formula (1) and an ester wax represented by Formula (2): where, in Formula (1), 1 represents a positive integer of 2 to 12, and n and m each independently represents a positive integer of 12 to 20, and in Formula (2), p represents a positive integer of 2 to 10, and q and r each independently represents a positive integer of 11 to 21. ### Claim 5 (depends on 4) The electrophotographic developer set according to claim 4, wherein the wax A comprises the ester wax represented by Formula (1), and in Formula (1), 1 represent 2, and n and m each independently represents a positive integer of 14 to 20. ### Claim 6 (depends on 1) The electrophotographic developer set according to claim 1, wherein a content N of the wax A in the powder adhesive is 6.0 to 18.0 mass %. ### Claim 7 (depends on 1) The electrophotographic developer set according to claim 1, wherein the powder adhesive further contains a wax B; and the wax B is a linear saturated hydrocarbon wax having a peak carbon number of 20 to 70. ### Claim 8 (depends on 1) The electrophotographic developer set according to claim 1, wherein the thermoplastic resin B is a styrene acrylic resin or a polyester resin. ### Claim 9 (depends on 1) The electrophotographic developer set according to claim 1, wherein an ester group concentration in the thermoplastic resin B is 1.00 to 7.00 mmol/g. ### Claim 10 (depends on 1) The electrophotographic developer set according to claim 1, wherein B/A is 0.50 to 2.00, where A denotes a peak molecular weight of a main peak in a molecular weight distribution of a tetrahydrofuran-soluble fraction of the toner; and B denotes a peak molecular weight of a main peak in a molecular weight distribution of a tetrahydrofuran-soluble fraction of the powder adhesive. ### Claim 11 (depends on 1) The electrophotographic developer set according to claim 1, wherein the toner further comprises a wax; and Nb/Na is 0.80 to 6.00, where Na (mass %) denotes a content of total wax in the toner, and Nb (mass %) denotes a content of total wax in the powder adhesive. ### Claim 12 (depends on 1) The electrophotographic developer set according to claim 1, wherein the Gt′(100) is 5.00×103 to 2.00×105 Pa. ### Claim 13 (depends on 1) The electrophotographic developer set according to claim 1, wherein the thermoplastic resin A is a styrene acrylic resin. ### Claim 14 A method for producing a bonded product resulting from bonding at least one sheet of paper via an adhesive portion by using an electrophotographic developer set, wherein the electrophotographic developer set comprises a toner, and a powder adhesive, the toner comprises a thermoplastic resin A, the powder adhesive comprises a thermoplastic resin B and a wax A, the wax A has two or more ester groups in a molecule, the thermoplastic resin B has an ester group, and in a viscoelasticity measurement, with Gt′(100) (Pa) being a storage elastic modulus at 100° C. of the toner, and Gb′(100) (Pa) being a storage elastic modulus at 100° C. of the powder adhesive, Gb′(100) is 1.00×105 Pa or less, and Gt′(100)/Gb′(100) is 1.20 or more, wherein the bonded product has a surface A on which an adhesive portion of the powder adhesive is fixed, and a surface B on which a toner image portion of the toner is fixed, the surface B being a surface different from the surface A, wherein the method comprises the following steps, in no particular order: forming the toner image portion on the surface B, and fixing the toner image portion on the surface B by heating; and forming the adhesive portion on the surface A, and fixing the adhesive portion on the surface A by heating, and wherein the method further comprises the following steps, after formation and fixation of the toner image portion and the adhesive portion, overlaying the paper so as to interpose the adhesive portion, and melting the adhesive portion thereby bonding the paper to obtain the bonded product.