# US 2025/0084221 A1 · Masterbatch, rubber composition for tire, tire, and manufacturing methods thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0084221 A1 - Document ID: US20250084221A1 - Status: Published application - Kind: A1 - Application number: 18/788,381 - Filed: 2024-07-30 - Published: 2025-03-13 - Earliest claimed: 2023-09-08 - Assignees: Toyo Tire Corporation - Applicants: Toyo Tire Corporation - Inventors: Keisuke Mogari - Web page: https://patentgrep.com/patent/US20250084221A1 ## CPC - C08J 3/22: using masterbatch techniques - B60C 1/0041: {Compositions of the carcass layers} - C08K 3/36: Silica - C08K 7/02: Fibres or whiskers - C08L 7/02: Latex - C08J 2307/02: Latex - C08J 2401/02: Cellulose; Modified cellulose - C08K 2201/003: Additives being defined by their diameter - C08K 2201/005: Additives being defined by their particle size in general - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES - 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) ## Abstract A masterbatch manufacturing method includes an operation in which at least a cellulose nanofiber dispersion, colloidal silica, and diene-based rubber latex are mixed to prepare a liquid mixture; and an operation in which the liquid mixture is coagulated. ## Claims ### Claim 1 A masterbatch manufacturing method comprising: an operation in which at least a cellulose nanofiber dispersion, colloidal silica, and diene-based rubber latex are mixed to prepare a liquid mixture; and an operation in which the liquid mixture is coagulated. ### Claim 2 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein the colloidal silica has a particle size of 2 nm to 40 nm. ### Claim 3 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein silica particles in the colloidal silica are 1 part by mass or more and 30 parts by mass or less per 100 parts by mass of a dry rubber component in the diene-based rubber latex in the operation in which the liquid mixture is prepared. ### Claim 4 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein a fiber diameter of cellulose nanofibers in the cellulose nanofiber dispersion is 100 nm or less. ### Claim 5 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein cellulose nanofibers in the cellulose nanofiber dispersion are 1 part by mass or more and 50 parts by mass or less per 100 parts by mass of a dry rubber component in the diene-based rubber latex in the operation in which the liquid mixture is prepared. ### Claim 6 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein the diene-based rubber latex is natural rubber latex. ### Claim 7 (depends on 1) The masterbatch manufacturing method according to claim 1, further comprising an operation in which a coagulum obtained in the operation in which the liquid mixture is coagulated is dewatered. ### Claim 8 (depends on 1) The masterbatch manufacturing method according to claim 1, further comprising an operation in which a coagulum obtained in the operation in which the liquid mixture is coagulated is dewatered using an extruder. ### Claim 9 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein the colloidal silica has a particle size of 30 nm or less. ### Claim 10 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein the colloidal silica has a particle size of 20 nm or less. ### Claim 11 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein silica particles in the colloidal silica are 3 parts by mass or more and 20 parts by mass or less per 100 parts by mass of a dry rubber component in the diene-based rubber latex in the operation in which the liquid mixture is prepared. ### Claim 12 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein silica particles in the colloidal silica are 5 parts by mass or more and 15 parts by mass or less per 100 parts by mass of a dry rubber component in the diene-based rubber latex in the operation in which the liquid mixture is prepared. ### Claim 13 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein cellulose nanofibers in the cellulose nanofiber dispersion are 3 parts by mass or more and 30 parts by mass or less per 100 parts by mass of a dry rubber component in the diene-based rubber latex in the operation in which the liquid mixture is prepared. ### Claim 14 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein cellulose nanofibers in the cellulose nanofiber dispersion are 5 parts by mass or more and 30 parts by mass or less per 100 parts by mass of a dry rubber component in the diene-based rubber latex in the operation in which the liquid mixture is prepared. ### Claim 15 (depends on 1) The masterbatch manufacturing method according to claim 1, wherein cellulose nanofibers in the cellulose nanofiber dispersion are 5 parts by mass or more and 20 parts by mass or less per 100 parts by mass of a dry rubber component in the diene-based rubber latex in the operation in which the liquid mixture is prepared. ### Claim 16 (depends on 1) A method for manufacturing a rubber composition for tire, the method comprising: an operation in which a masterbatch is prepared by the masterbatch manufacturing method according to claim 1; and an operation in which the masterbatch is used to prepare a rubber composition. ### Claim 17 (depends on 16) The method for manufacturing a rubber composition for tire according to claim 16, wherein the operation in which the rubber composition is prepared includes kneading at least the masterbatch and a compounding ingredient to prepare a rubber mixture and kneading at least the rubber mixture and sulfur to obtain a rubber composition. ### Claim 18 (depends on 1) A tire manufacturing method comprising: an operation in which a masterbatch is prepared by the masterbatch manufacturing method according to claim 1; an operation in which the masterbatch is used to prepare a rubber composition; and an operation in which the rubber composition is used to prepare an unvulcanized tire. ### Claim 19 (depends on 18) The tire manufacturing method according to claim 18, wherein the operation in which the unvulcanized tire is prepared includes preparing a tire member containing the rubber composition and preparing the unvulcanized tire containing the tire member. ### Claim 20 (depends on 18) The tire manufacturing method according to claim 18, further comprising an operation in which the unvulcanized tire is vulcanized and molded.