Patents for November
Patent as compiled for November
Shaped elastomeric container with integrated leak resistant seal and pressure shield
U.S. patent: 11,124,330
Issued: September 21, 2021
Inventors: Paul Maguire, Katousha Ghaemi Nouri, Angelo Carpinelli and Bryan Kin Fo Au
Assigned: Stasher
Key statement: A container made of an elastomer such as silicone with an integrated leak resistant seal and pressure shield. Seal incorporates press-fit elements with sizes and shapes sufficient to provide a strong seal that resists leakage of liquids from inside the container; seal is integrated into the container and requires no external clips or clasps. The pressure shield increases leak resistance by at least 300% and is formed by adding material to the inside of the container and not to the engaging portions of the seal, and works by deflecting pressure away from the two leak resistant seal portions. Additional features are provided to facilitate opening such as extended flaps for pulling the sides open and asymmetric cavities for press-fit elements to reduce the initial opening force. The container may include a hole and be of asymmetrical shape, such as trapezoidal, to provide a wide opening along with a strong seal.
Method of producing a modified diene-containing rubber, the rubber and a composition based thereon
U.S. patent: 11,124,590
Issued: September 21, 2021
Inventors: Alexei Mikhailovich Averkov and Svetlana Viktorovna Turenko
Assigned: Sibur Holding
Key statement: The present invention relates to a method of producing a rubber, comprising copolymerizing at least one diene monomer and optionally at least one vinylaromatic monomer and a vinyl-silicone compound, in the presence of a functionalizing lithium initiator and modifying the obtained copolymer by a poly functional silicon-containing agent. The functionalizing lithium initiator is obtained by reacting an organolithium compound, a secondary amine and a diene-containing compound. In addition, the instant inventon relates to rubbers obtained by said method, rubber compositions and vulcanizates based thereon, semi-finished products and tires, comprising such a rubber. The present invention provides obtaining of rubber compositions and vulcanizates based thereon characterized by the improved complex of hysteresis properties.
Rubber compositions
U.S. patent: 11,124,631
Issued: September 21, 2021
Inventors: Hiromi Maeda, Daisuke Koda, Hiroshi Kanbara and Satomi Ohta Assigned: Kuraray
Key statement: Disclosed herein is a rubber composition containing 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound represented by the formula (1) and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying (i) to (iii): (i) a weight average molecular weight (Mw) is not less than 1,000 and less than 15,000; (ii) a vinyl content is not more than 70 mol %; and (iii) an average number of functional groups per molecule of the modified liquid diene rubber (B) is 1 to 20.
Rubber composition for tires and pneumatic tires
U.S. patent: 11,124,632
Issued: September 21, 2021
Inventor: Tsuyoshi Tsuchida
Assigned: Sumitomo Rubber Industries
Key statement: The present invention provides a rubber composition for tires which provides significantly improved abrasion resistance while maintaining fuel economy and a pneumatic tire including the rubber composition. The present invention relates to a rubber composition for tires including: a silane coupling agent containing an alkoxysilyl group and a sulfur atom, the alkoxysilyl group being linked to the sulfur atom by six or more carbon atoms; and sulfur, the rubber composition including, per 100 parts by mass of the rubber component therein, 1.5 parts by mass or less of the sulfur.
Rubber composition comprising a modified diene elastomer
U.S. patent: 11,124,634
Issued: September 21, 2021
Inventors: Marie-Laure Francois and Benoit De-Gaudemaris
Assigned: Michelin
Key statement: A rubber composition based on at least a reinforcing filler, a crosslinking system, a plasticizing system and an elastomer matrix is provided. The elastomer matrix includes at least one modified diene elastomer comprising within its structure at least one alkoxysilane group, which is optionally partially or totally hydrolyzed to silanol, bonded to the elastomer by the silicon atom. The alkoxysilane group optionally bears another function bonded to the silicon atom directly or by means of a spacer group. The modified diene elastomer is such that, before modification, the diene elastomer has a polydispersity index of at least 1.1 and at most 1.6, and has a Mooney viscosity ranging from 50 to 80 and a glass transition temperature (Tg) of strictly less than -50°C, preferably less than or equal to -60°C and greater than or equal to -110°C.
Biofiller for rubber reinforcement
U.S. patent: 11,124,653
Issued: September 21, 2021
Inventors: Vinod Malshe, Sangeeta Srivastava and Manisha Jadhav
Assigned: Godavari Biorefineries
Assigned: Godavari Biorefineries
Key statement: A biofiller for rubber reinforcement; said biofiller is surface treated up to 10% by weight of microcrystalline lignocellulose with aldehyde and/or ketone. The said biofiller has economic significance as well as reduces pollution as it replaces 2% carbon black from the rubber composition which is a substantial amount after reviewing overall use of carbon black in rubber industries such as the tire industry, worldwide. A rubber composition comprising the said biofiller and its various applications such as tires, shoes, bags, belts, etc.
Test method for wear resistance performance, method of manufacturing tread rubber, method of manufacturing tire, and tire
U.S. patent: 11,125,652
Issued: September 21, 2021
Inventors: Shinya Nakano and Toshio Tada
Assigned: Sumitomo Rubber Industries
Key statement: A test method of accurately evaluating wear resistance performance of a rubber material when used as a tread rubber of a tire, comprises the steps of: preparing a test piece of the rubber material having a ground contact surface extending in a circumferential direction; abrading the ground contact surface by rolling the test piece on a running surface of a wear testing machine at a slip ratio of not more than 3.5%; and evaluating the wear resistance performance of the test piece by comparing the amount of wear of the test piece with a predetermined threshold value.
Process for bacterially devulcanizing sulfur vulcanized rubber particles
U.S. patent: 11,124,759
Issued: September 21, 2021
Inventors: Davide Staedler, Thibaud Spinetti and Christian Lowe
Assigned: Tyre Recycling Solutions
Key statement: A new acidithiobacillus ferrooxidans strain as well as a process for bacterially devulcanizing sulfur vulcanized rubber particles and devulcanized rubber particles obtainable by the process.
Method for retreading a tire using a dual heating effect
U.S. patent: 11,130,303
Issued: September 28, 2021
Inventor: Gregory Marcet
Assigned: Michelin
Key statement: The method includes the step of passing an electric current through at least one wire that is situated between a carcass of a tire casing and a tread. The method also includes the step of calculating a value of a temperature of the wire as a function of a relative value of the current. The method proceeds with the step of controlling the current as a function of the temperature value calculated.
Modified conjugated diene-based polymer and rubber composition including the same
U.S. patent: 11,130,832
Issued: September 28, 2021
Inventors: Jin Young Kim, Won Hee Kim, He Seung Lee, Ki Seok Son and No Ma Kim
Assigned: LG Chem
Key statement: A modified conjugated diene-based polymer and more particularly, a modified conjugated diene-based polymer prepared by continuous polymerization and having remarkable processability, narrow molecular weight distribution and excellent physical properties and a rubber composition including the same.
Rubber composition
U.S. patent: 11,136,416
Issued: October 5, 2021
Inventors: Yutaka Yoshida, Takuma Tsuboi, Shotaro Shibata, Yoshiaki Kumamoto and Motoi Konishi
Assigned: Kao
Key statement: A rubber composition containing a rubber and modified cellulose fibers, wherein one or more substituents selected from substituents represented by the following general formulas (1) and (2): –CH2–CH(OH)–R1 (1), –CH2–CH(OH)–CH2–(OA)n–O –R1 (2), wherein each R1 in the general formulas (1) and (2) is independently a linear or branched alkyl group having three or more carbon atoms and 30 or fewer carbon atoms; n in the general formula (2) is a number of 0 or more and 50 or less; and A is a linear or branched, divalent saturated hydrocarbon group having one or more carbon atoms and six or fewer carbon atoms are bonded to cellulose fibers via an ether bond, wherein the modified cellulose fibers have a cellulose I crystal structure. The rubber composition of the present invention can be suitably used for machine tool parts, household electric appliance parts, automobile parts and the like.