August Patents
Patent News as compiled by the editors of Rubber World for August 2024.
Low-dielectric rubber resin material and low-dielectric metal substrate
U.S. patent: 11,859,083
Issued: January 2, 2024
Inventors: Te-Chao Liao, Hung-Yi Chang, Chia-Lin Liu and Chien-Kai Wei
Assigned: Nan Ya Plastics
Key statement: A low-dielectric rubber resin material and a low-dielectric
metal substrate are provided. The rubber resin material includes a
low dielectric rubber resin composition and inorganic fillers. The low dielectric rubber resin composition includes: 5 weight % to 40 weight % of a
liquid rubber, 20 weight % to 70 weight % of a polyphenylene ether resin, 5
weight % to 30 weight % of a bismaleimide resin and 20 weight % to 45
weight % of a crosslinker. A molecular weight of the liquid rubber ranges
from 800 g/ mol to 6,000 g/mol. An iodine value of the liquid rubber ranges
from 30 g/100 g to 60 g/100 g.
Tire
U.S. patent: 11,858,296
Issued: January 2, 2024
Inventor: Koichi Nakajima
Assigned: Sumitomo Rubber Industries
Key statement: A tire that can achieve both desired visibility and design
properties of a mark provided on a sidewall portion is provided. A tire has a
mark provided on a surface of a sidewall portion so as to be raised from the
surface. The mark includes a curved surface portion curved so as to project
in a direction substantially perpendicular to the surface of the sidewall
portion and a flat surface portion provided on at least one side in a tire
circumferential direction of the curved surface portion and a raised height h
of the flat surface portion from the surface gradually decreases with
increasing distance in the tire circumferential direction from the curved
surface portion.
Tire high temperature forecasting system
U.S. patent: 11,865,875
Issued: January 9, 2024
Inventors: Adam William Birdsall and Wesley Conyers Clark
Assigned: Goodyear Tire & Rubber
Key statement: A tire high temperature forecasting system includes at least
one tire that supports a vehicle, and at least one sensor mounted on the tire
for measuring a temperature of the tire. An electronic memory capacity is in
a unit mounted on the tire for storing tire identification information. A
processor is in electronic communication with the sensor and the electronic
memory capacity, in which the processor receives and correlates the
measured temperature, a time of the temperature measurement and the
tire identification information. Transmission means transmit the measured
temperature, a time of the temperature measurement, and the tire
identification information to a remote processor. The remote processor
executes a forecasting model and the forecasting model generates a
forecast estimate. If the forecast estimate includes a predicted high
temperature that is greater than a predetermined high temperature
threshold for the tire, an alert is generated by the forecasting model.
Rubber composition for tires and tire
U.S. patent: 11,866,586
Issued: January 9, 2024
Inventor: Ryoji Matsui
Assigned: Sumitomo Rubber
Key statemement: The present disclosure aims to provide a tire rubber
composition and a tire which have good wet grip performance and an
excellent ability to reduce deterioration of wet grip performance and
abrasion resistance over time. The present disclosure relates to a tire
rubber composition which contains one or more rubber components having
a combined content of styrene butadiene rubber and polybutadiene of 90%
by mass or more, one or more fillers and one or more vulcanizing agents,
the rubber composition as a whole having a vinyl content of 20 mol % or
higher and a trans content of 50 mol % or higher, each based on 100 mol %
of the combined amount of the butadiene based structural units in the
butadiene portion of the styrene butadiene rubber and the polybutadiene.
Acrylic rubber and crosslinkable composition thereof
U.S. patent: 11,866,532
Issued: January 9, 2024
Inventor: Daichi Toge
Assigned: Unimatec
Key statement: An acrylic rubber that is a copolymer in which 1 to 3 weight
% of a fumaric acid monoalkyl ester monomer containing an alkyl group
having 1 to 8 carbon atoms is copolymerized as a crosslinkable comonomer,
wherein 45 to 65 weight % of n-butyl acrylate, 12 to 32 weight % of 2-
methoxyethyl acrylate and 11 to 30 weight % of ethoxyethoxyethyl acrylate
are copolymerized in 100 weight % of comonomers other than the
crosslinkable comonomer. This acrylic rubber can suppress the reduction of
oil resistance while improving cold resistance represented by a TR-10 value.
Artificial turf infill with natural fiber and rubber granulate
U.S. patent: 11,859,352
Issued: January 2, 2024
Inventor: Jorg Siekmann
Assigned: Melos GmbH
Key statement: An artificial turf includes an artificial turf infill. The artificial
turf infill includes natural fiber mixed with rubber granulate. The artificial
turf infill includes between 10% and 40% of the natural fiber by weight. The
natural fiber includes any one of hemp fiber, cotton fiber, burlap fiber, sisal
fiber, elephant grass fiber, or combinations thereof.
Curable fluoropolyether based rubber composition and optical component
U.S. patent: 11,866,579
Issued: January 9, 2024
Inventor: Hidenori Koshikawa
Assigned: Shin-Etsu Chemical
Key statement: Provided are: a curable fluoropolyether based rubber
composition from which a cured product having good light transmissivity
and excellent rubber strength is produced; and an optical component
having a cured product layer of said composition. The curable
fluoropolyether based rubber composition contains: (A) a linear polyfluoro
compound having at least two alkenyl groups in one molecule and a
perfluoropolyether structure in a main chain; (B) a fluorine-containing
organohydrogen siloxane which has at least two hydrogen atoms directly
bonded to a silicon atom (SiH group) and has a monovalent perfluoroalkyl
group or a monovalent perfluorooxyalkyl group or a divalent
perfluoroalkylene group or a divalent perfluorooxyalkylene group in one
molecule; (C) sodium fluoride; and (D) a platinum group metal based
catalyst in an amount of 0.1-2,000 ppm in terms of the mass of a platinum
group metal atom with respect to component (A).
Tread for an aircraft tire
U.S. patent: 11,865,866
Issued: January 9, 2024
Inventors: Jean-Luc Cabioch and Michael Arnoux
Assigned: Michelin
Key statement: An aircraft tire comprises a tread (2), having an axial width L,
which comprises a middle portion (3) having an axial width LC at least equal
to 50% and at most equal to 80% of the axial width L of the tread and
consisting of a middle rubber composition and two lateral portions (41, 42),
positioned axially on either side of the middle portion (3), each having an
axial width (LS1, LS2) at least equal to 10% and at most equal to 25% of the
axial width L of the tread and each consisting of a lateral rubber
composition. The middle rubber composition comprises in particular from
25 to 85 phr of a tin-functionalized butadiene and styrene copolymer and
from 15 to 75 phr of isoprene elastomer and at least one lateral rubber
composition is different from the middle rubber composition.
ddition-curable liquid silicone rubber composition and molded silicone rubber object
U.S. patent: 11,866,583
Issued: January 9, 2024
Inventors: Nobu Kato
Assigned: Shin-Etsu Chemical
Key statement: An addition-curable liquid silicone rubber composition and a
molded silicone-rubber object are provided. The addition-curable liquid
silicone rubber composition comprises (A) an alkenylated linear
organopolysiloxane which has one silicon-atombonded alkenyl group only
at each of both molecular-chain terminals and which has an average degree
of polymerization of 1,500 or lower and is liquid at 25°C, (B) an alkenylated
linear organopolysiloxane which has two or three silicon-atom-bonded
alkenyl groups at each of both molecularchain terminals and which has an
average degree of polymerization of 1,500 or lower and is liquid at 25°C, (C)
organohydrogenpolysiloxanes comprising (C-1) an
organohydrogenpolysiloxane having at least three silicon atom- bonded
hydrogen atoms and (C-2) a linear organohydrogenpolysiloxane blocked
with a diorganohydrogensiloxy group at each of both molecular- chain
terminals, (D) reinforcing silica obtained by hydrophobizing fumed silica
having a BET specific surface area of 130 m2/g or larger and (E) an addition reaction catalyst.
Tire comprising a crumb rubber
U.S. patent: 11,865,865
Issued: January 9, 2024
Inventors: Nathalie Coste, Severin Dronet, Vincent Lafaquiere and Claire
Rannoux
Assigned: Michelin
Key statement: A tire comprises a rubber layer comprising from 50% to
100% by mass of a rubber crumb having a ratio of the chloroform extract to
the acetone extract of less than 2, the chloroform and acetone extracts
being expressed as percentages by mass.
Rubber composition based on epoxy resin, an amine hardener and an imidazole
U.S. patent: 11,866,578
Issued: January 9, 2024
Inventors: Emmanuel Landreau and Etienne Fleury
Assigned: Michelin
Key statement: A rubber composition is based on at least a diene elastomer,
a reinforcing filler, a crosslinking system, an epoxy resin, an amine hardener
comprising at least two primary amine functions, located on at least one six membered aromatic ring, and an imidazole.
Method for producing conjugated diene rubber
U.S. patent: 11,873,364
Issued: January 16, 2024
Inventors: Takuro Sakurai, Takashi Iizuka, Mana Fujii and Hisakatsu Hama
Assigned: Zeon, Sumitomo Chemical and ZS Elastomers
Key statement: A method for producing conjugated diene rubber is
provided, including: a first step of obtaining a conjugated diene polymer
chain having an active end by polymerizing a monomer comprising a
conjugated diene compound and a vinyl compound having a functional
group interactive with silica using a polymerization initiator in an inert
solvent; a second step of reacting a siloxane compound with the active end
of the conjugated diene polymer chain having the active end; and a third
step of reacting a hydrocarbyloxysilane compound with the conjugated
diene polymer chain with which the siloxane compound has been reacted
that is obtained in the second step.
Protective tire device
U.S. patent: 11,884,142
Issued: January 30, 2024
Inventor: Dwight LoRay
Key statement: A system for a protective tire device including a cover
assembly, strap assembly and a tire assembly is disclosed. The cover
assembly includes a dome cover. The dome cover includes through holes
reinforced with o-rings located equidistantly about a circumference of the
dome cover. Each through hole receives one of a plurality of elastomeric
straps having a hook at a distal end thereof. The dome cover is mounted
over a tire sitting atop a tire stack. The elastomeric straps extend
downwardly along the tire stack. The hooks of the elastomeric straps are
extended towards a center of the tire stack such that the elastomeric straps
are sandwiched between two tires of the tire stack. The hooks engage an
inner liner of the tire from underneath, creating tension on the elastomeric
straps and securing the dome cover to the tire to prevent access to the
interior of the tire stack.