Patents for September 2022

Patents as compiled by the editor of Rubber World Magazine for September 2022

Tire provided with an outer sidewall containing a composition comprising a crumb rubber
U.S. patent: 11,396,208
Issued: July 26, 2022
Inventors: Pierre Tregouet, Muhamed Jesbeer Kallungal and Abdul Jaleel
Assigned: Michelin
Key statement: A tire is provided with an outer sidewall, said outer sidewall comprising at least a rubber composition based on at least an elastomer, a reinforcing filler, a crosslinking system and more than 25 phr of a crumb rubber.

Rubber composition for inner liner and pneumatic tire using the same
U.S. patent: 11,401,401
Issued: August 2, 2022
Inventor: Masaki Kanaya
Assigned: Toyo Tire
Key statement: Provided are a rubber composition for an inner liner having excellent air permeability resistance and low temperature fatigue resistance and a pneumatic tire using the same. The rubber composition for an inner liner contains 0.05 to 0.9 parts by mass of 1,6-hexamethylene dithiosulfate sodium dihydrate with respect to 100 parts by mass of a rubber component, in which a whole sulfur content is less than 0.3 parts by mass.

Cable bead and tire
U.S. patent: 11,400,766
Issued: August 2, 2022
Inventors: Xiang Liu, Weigang Miao and Haidong Yao
Assigned: Jiangsu Xingda Steel Tyre Cord
Key statement: Disclosed are a cable bead and a tire. The cable bead includes a core wire located at the middle position of the bead and at least one layer of outer winding wires wound around the core wire, each layer of outer winding wires being evenly wound along the circumferential direction of the core wire, where the cross section of the outer winding wires is a flat surface having a major axis and a minor axis; the major axis is perpendicular to the radial direction of the cross section of the bead and the minor axis is parallel to the radial direction of the cross section of the bead; the outer winding wires are in surface contact with the core wire; and when there are at least two layers of outer winding wires, a line contact is formed between the layers of outer winding wires.

Tire for heavy goods vehicle
U.S. patent: 11,400,756
Issued: August 2, 2022
Inventors: Olivier Goncalves, Muhamed Jesbeer Kallungal Abdul Jaleel and Perrine Vallat
Assigned: Michelin
Key statement: The tire has a radial carcass reinforcement intended to equip vehicles carrying heavy loads and running at sustained speed. The tire comprises a crown reinforcement, itself capped radially with a tread joined to two beads via two sidewalls. The tread comprises at least two radially superposed layers of polymeric compound, a radially outer first layer that comes into contact with the ground and a radially inner second layer. The second layer has a composition based on at least a diene elastomer, a reinforcing filler comprising predominantly a filler covered at least partially by silica, an agent for coupling the filler with the elastomer and a crosslinking system. The dispersion of the filler in the elastomeric matrix has a Z value greater than or equal to 70.

High performing low viscosity tire sealant
U.S. patent: 11,407,883
Issued: August 9, 2022
Inventors: Nihar Ranjan Kundu, Ranjith Kokkot, Ryan Jones, Martin Spindler and Suboth Srinivas Deshpande
Assigned: Illinois Tool Works
Key statement: A high performing low viscosity tire sealant includes about 15% to about 75% by weight of a biobased aliphatic diol, about 5% to about 50% by weight natural rubber latex and about 2% to about 50% by weight synthetic rubber latex. The tire sealant exhibits excellent performance at temperatures of -40° Celsius and lower.

Tire rubber composition
U.S. patent: 11,413,905
Issued: August 16, 2022
Inventors: Hirokazu Kageyama, Kazushi Kimura, Genichiro Shimada and Satoshi Mihara
Assigned: Yokohama Rubber
Key statement: The present technology provides a tire rubber composition formed by blending a microparticle composite, which is formed from a solid component of a mixture containing an emulsion of an organic microparticle and a rubber latex, in a sulfur vulcanizable rubber; the emulsion of the organic microparticle being an emulsion containing a microparticle obtained by polymerizing and/or crosslinking at least one selected from the group consisting of polymerizable monomers and oligomers, prepolymers and polymers having a reactive functional group and having a molecular weight from 500 to 50,000 simultaneously or stepwise in water; and an average particle size of the microparticle being from 0.001 to 100 μm.

Silane, rubber mixture containing the silane, vehicle tire comprising the rubber mixture in at least one component and process for producing the silane
U.S. patent: 11,414,441
Issued: August 16, 2022
Inventors: Julian Strohmeier, Julia Schoffel, Andreas Jacob, Jaana Jurges, Julien Davin and David-Raphael Dauer
Assigned: Continental Reifen Deutschland GmbH
Key statement: The invention relates to a silane, to a rubber mixture comprising the silane and to a vehicle tire which comprises the rubber mixture in at least one component and to a process for producing the silane. The silane of the invention has the following formula I):
(R1)oSi–R2–S–R3–S–R3–S–X I) which, according to the invention, comprises the –R2–S–R3–S–R3– unit in the spacer group. The rubber mixture of the invention comprises at least one silane of the invention.

Method and device for managing tire data
U.S. patent: 11,423,714
Issued: August 23, 2022
Inventors: Jack Zhang and Yue Wang
Assigned: Hamaton Automoive Technology
Key statement: A method and device for managing tire data. The method includes: after receiving a tire identification reported by a data sending module, a data interaction module or a data monitoring module and tire usage data of a tire corresponding to the tire identification, correspondingly storing the tire usage data and the tire identification so that the corresponding identification information and the tire usage data can be quickly and efficiently found when a user calls these usage data. The unified management of the related data of the tire provides a data support for the big-data analysis of the tire based on these data and also enables the unified management of multiple tires and multiple vehicles.

Modified conjugated diene-based polymer, rubber composition and tire
U.S. patent: 11,414,503
Issued: August 16, 2022
Inventors: Shinichi Sekikawa and Miki Kyo
Assigned: Asahi Kasei Kabushiki Kaisha
Key statement: A modified conjugated diene-based polymer, including a coupling polymer, wherein a ratio of the coupling polymer, obtained by gel permeation chromatography (GPC), is 30% by mass or more and less than 70% by mass in the entire modified conjugated diene-based polymer and a modification ratio obtained by adsorption GPC is 30% by mass or more and less than 70% by mass in the entire modified conjugated diene-based polymer, when a peak top molecular weight, obtained by the GPC, of the coupling polymer of the modified conjugated diene-based polymer is represented by Mp1 and a peak top molecular weight of a non-coupling polymer is represented by Mp2, (Mp1/Mp2) ≥ 3.4 and a shrinking factor (g’) is less than 0.60.

Modified conjugated diene-based polymer and rubber composition including the same
U.S. patent: 11,414,510
Issued: August 16, 2022
Inventors: Jung Hwan Oh, You Seok Seo, Jae Hoon Choe, Min Soo Kim and No Ma Kim
Assigned: LG Chem
Key statement: The present invention relates to a modified conjugated diene-based polymer, and more particularly to a modified conjugated diene-based polymer prepared by continuous polymerization and having a specific polymer structure and molecular weight distribution degree and shape and thus having remarkable processability and narrow molecular weight distribution and thus having excellent physical properties and a rubber composition including the same.

Thermoplastic rubber
U.S. patent: 11,421,099
Issued: August 23, 2022
Inventor: William B. Coe
Key statement: Prism Thermoplastic Rubber (PTR) is a novel, composite rubber material technology principally compounded from EOL, ambient ground, whole tires through the management of a unique process governed by the application of advanced, quantum field physics. The value from this technology is to provide a virgin material analog that may be readily integrated at high ratio into new tire construction using conventional tire chemistry and manufacturing techniques resulting in a sustainable and significant, positive cost-benefit ratio as compared to current tire manufacturing economics.

Tire puncture sealing agent and tire puncture repair kit
U.S. patent: 11,420,402
Issued: August 23, 2022
Inventor: Kiyohito Takahashi
Assigned: Yokohama Rubber
Key statement: The present invention provides a tire puncture sealing agent having excellent storage performancen and a tire puncture repair kit. The tire puncture sealing agent of the present invention contains: a rubber latex and/or a resin emulsion; a predetermined glycol ether; and a non-ionic surfactant having an HLB value from 15 to 20.

Method of manufacturing rubber composition
U.S. patent: 11,427,700
Issued: August 30, 2022
Inventors: Jae Yun Kim, Yeong Min Jung and Soojung Park
Assigned: Korea Kumho Petrochemical
Key statement: A method of manufacturing a rubber composition is provided. The method includes: (a) allowing a mixture including a conjugated diene-based monomer to react in the presence of a first catalyst; (b) introducing a carboxylic acid-based compound into the product of the step (a) to deactivate the first catalyst; and (c) introducing a second catalyst and a conjugated diene-based monomer into the product of the step (b) and allowing the second catalyst and the conjugated diene-based monomer to react with the product of the step (b).