# US 2022/0035261 A1 · Electrophotographic developer set comprising toner and powder adhesive, method for producing bonded product, and powder adhesive > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0035261 A1 - Document ID: US20220035261A1 - Status: Published application - Kind: A1 - Application number: 17/385,147 - Filed: 2021-07-26 - Published: 2022-02-03 - Earliest claimed: 2020-07-31 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Tsutomu Shimano; Koji Nishikawa; Yuhei Terui; Shohei Yamashita; Kohei Matsuda; Yuki Nishizawa - Web page: https://patentgrep.com/patent/US20220035261A1 ## CPC - G03G 9/08711: {with esters of acrylic or methacrylic acid} - G03G 9/0823: {Electric parameters} - G03G 9/08782: {Waxes} - G03G 9/131: {obtained by reactions only involving carbon-to-carbon unsaturated bonds} - G03G 9/135: characterised by stabiliser or charge-controlling agents - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract An electrophotographic developer set comprising a toner comprising a thermoplastic resin and a wax, and a powder adhesive comprising a thermoplastic resin and a wax, wherein where Ea (mmol/g) denotes an ester group concentration of the wax contained in the toner, Na (mass %) denotes a content of the wax in the toner, Eb (mmol/g) denotes an ester group concentration of the wax contained in the powder adhesive, and Nb (mass %) denotes a content of the wax in the powder adhesive, the Ea, the Na, the Eb and the Nb satisfy the following formulae: 0.00≤Ea≤2.45, 2.50≤Eb≤3.60, and 0.80≤Nb/Na. ## Claims ### Claim 1 An electrophotographic developer set comprising a toner comprising a thermoplastic resin and a wax, and a powder adhesive comprising a thermoplastic resin and a wax, wherein where Ea (mmol/g) denotes an ester group concentration of the wax contained in the toner, Na (mass %) denotes a content of the wax in the toner, Eb (mmol/g) denotes an ester group concentration of the wax contained in the powder adhesive, and Nb (mass %) denotes a content of the wax in the powder adhesive, the Ea, the Na, the Eb and the Nb satisfy the following formulae: 0.00≤Ea≤2.45, 2.50≤Eb≤3.60, and 0.80≤Nb/Na. ### Claim 2 (depends on 1) The electrophotographic developer set according to claim 1, wherein the Ea and the Eb satisfy 0.50≤Eb−Ea≤3.40. ### Claim 3 (depends on 1) The electrophotographic developer set according to claim 1, wherein the wax comprised in the powder adhesive comprises at least one selected from the group consisting of an ester wax represented by Formula (1) below and an ester wax represented by Formula (2) below: in Formula (1), 1 represents a positive integer from 2 to 12, and n and m each independently represent a positive integer from 12 to 20; and in Formula (2), p represents a positive integer from 2 to 10, and q and r each independently represent a positive integer from 11 to 21. ### Claim 4 (depends on 3) The electrophotographic developer set according to claim 3, wherein the wax comprised in the powder adhesive comprises an ester wax represented by Formula (1), and in Formula (1), 1 represents 2, and n and m each independently represents a positive integer of 14 to 20. ### Claim 5 (depends on 3) The electrophotographic developer set according to claim 3, wherein a content Nb1 of the ester wax in the powder adhesive is 8.0 to 20.0 mass %. ### Claim 6 (depends on 3) The electrophotographic developer set according to claim 3, wherein the wax comprised in the powder adhesive further comprises a chain saturated hydrocarbon having a peak carbon number from 20 to 70. ### Claim 7 (depends on 1) The electrophotographic developer set according to claim 1, wherein the content Nb of the wax in the powder adhesive is 8.0 to 20.0 mass %. ### Claim 8 (depends on 1) The electrophotographic developer set according to claim 1, wherein a content of the wax in the toner is 2.0 to 15.0 mass %. ### Claim 9 (depends on 1) The electrophotographic developer set according to claim 1, wherein the wax in the toner comprises an ester compound of a monoalcohol having 18 to 24 carbon atoms and a monocarboxylic acid having 18 to 24 carbon atoms. ### Claim 10 (depends on 1) The electrophotographic developer set according to claim 1, wherein the thermoplastic resin comprised in the toner and the powder adhesive comprises at least one selected from the group consisting of a polyester resin and a styrene-acrylic resin. ### Claim 11 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 comprising a thermoplastic resin and a wax, and a powder adhesive comprising a thermoplastic resin and a wax, where Ea (mmol/g) denotes an ester group concentration of the wax contained in the toner, Na (mass %) denotes a content of the wax in the toner, Eb (mmol/g) denotes an ester group concentration of the wax contained in the powder adhesive, and Nb (mass %) denotes a content of the wax in the powder adhesive, the Ea, the Na, the Eb and the Nb satisfy the following formulae: 0.00≤Ea≤2.45, 2.50≤Eb≤3.60, and 0.80≤Nb/Na, wherein the bonded product has a surface A on which an adhesive portion of the powder adhesive is fixed, and a toner image portion of the toner is fixed, wherein the method comprises the following steps (A) and (B): (A) forming the toner image portion and the adhesive portion on at least one surface of the surface A, and fixing the toner image portion and the adhesive portion by heating, and (B) forming the adhesive portion on one surface of the surface A and fixing the adhesive portion by heating, and forming the toner image portion on at least the other surface of the surface A and fixing the toner image portion by heating, and wherein the method 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. ### Claim 12 A powder adhesive comprising a thermoplastic resin, a compound represented by Formula (1), and in Formula (1), 1 represents 2, and n and m each independently represent a positive integer of 14 to 20, and a chain saturated hydrocarbon having a peak carbon number of 20 to 70, wherein the thermoplastic resin is a styrene-acrylic resin, a content of the thermoplastic resin in the powder adhesive is 75.0 to 92.0 mass %, a content Nb1 of the compound represented by Formula (1) in the powder adhesive is 8.0 to 20.0 mass %, a content Nb2 of the chain saturated hydrocarbon having a peak carbon number of 20 to 70 in the powder adhesive is 0.1 to 5.0 mass %, and the Nb1 and the Nb2 satisfy 2.00≤Nb1/Nb2≤25.00.