Patents for October
Patent News and compiled by the editors of Rubber World Magazine for October 2024.
Tire anti-tarnish protective solution and preparation method thereof
U.S. patent: 11,912,893
Issued: February 27, 2024
Inventors: Guangmiao Zhu, Yanzhen Li, Jionghao He, Yue Li, Fangwei Hou
and Yanlei Li
Assigned: Qingdao University, Qingdao Chuangzhihengye New Materials
and Otsuka Material Science and Technology (Shanghai)
Key statement: A tire anti-tarnish protective solution and a preparation
method thereof are provided. The preparation method includes: mixing 15
to 25 parts of a waterborne epoxy resin, 20 to 35 parts of a toughening
waterborne resin, 0.5 to 2.5 parts of a modifier, 1 to 2 parts of a reactive
ultraviolet (UV) absorber, 1 to 3.5 parts of an active agent, 2.6 to 5.5 parts of
a film-forming additive and other additives, 0 to 6 parts of a pigment/ filler,
0.05 to 0.2 part of a bactericide and 40 to 60 parts of deionized water,
adding 0.4 to 1.6 parts of a curing additive, 0.05 to 0.5 part of a stabilizer
and 0.1 to 0.8 part of a thickener under stirring, stirring a resulting mixture
for a specified time and filtering a resulting system to obtain the protective
solution.
Rubber composition for tires and pneumatic tire
U.S. patent: 11,926,734
Issued: March 12, 2024
Inventor: Asuka Noda
Assigned: Toyo Tire
Key statement: Provided are a rubber composition for tires and a pneumatic
tire, which are excellent in braking performance on ice and failure
properties. The rubber composition for tires includes, per 100 parts by mass
of a solid rubber component, 1 to 20 parts by mass of a liquid
polybutadiene having a glass transition temperature of -80°C or less and 1
to 30 parts by mass of vegetable granules having a particle size of 0.1 to 500
μm.
Fluorine-containing liquid crystal elastomer and preparation method and use thereof
U.S. patent: 11,926,697
Issued: March 12, 2024
Inventors: Zhenping Cheng, Kai Tu, Enjie He, Jiannan Cheng, Lifen Zhang and
Xiulin Zhu
Assigned: Soochow University
Key statement: The present invention provides a fluorine-containing liquid
crystal polymer of Formula (1). The present invention also discloses a
fluorine- containing liquid crystal elastomer, which comprises a copolymer
of a fluorine-containing liquid crystal polymer of Formula (1) with a nearinfrared dye of Formula (2). The fluorine-containing liquid crystal elastomer
of the present invention shrinks due to the photothermal conversion effect
of the material under the irradiation of nearinfrared light and thus is widely
applicable to the field of actuators. The fluorine- containing liquid crystal
polymer of the present invention introduces fluorine- containing segments
into the crosslinked network of the liquid crystal polymer, to improve the
mechanical performance of the material and greatly extend the service time
of light-controlled actuators.
Aircraft pneumatic tire
U.S. patent: 11,926,182
Issued: March 12, 2024
Inventors: Eiji Ichihara and Yusuke Nakamura
Assigned: Bridgestone
Key statement: A first belt cord made of organic fibers of a spirally wound
belt layer extends at an angle of equal to or less than 5° relative to a tire
equatorial plane, a second belt cord made of organic fibers of a zigzag belt
layer extends at an inclination of an angle of 2° to 45° relative to the tire
equatorial plane, to folding back points where the second belt cord is folded
back at each width directional end edge of the zigzag belt layer and a
relation of N95 > N50 is satisfied. N50 is the number of stacked belt layers of
the spirally wound belt layers, at 50% of half the length of a maximum belt
width of belt layers from the tire equatorial plane. N95 is the number of
stacked belt layers of the spirally wound belt layers, at 95% of half the
length of the maximum belt.
Method for manufacturing foam rubber
U.S. patent: 11,926,724
Issued: March 12, 2024
Inventors: Tomoya Taniyama and Hidekazu Haneda
Assigned: Zeon
Key statement: A method for manufacturing a foam rubber by foaming a
polymer latex is provided, wherein the polymer latex used has a solids
content of 60.0 weight % or more, has a volume particle size distribution
where the volume cumulative particle size d10 is more than 140 nm and
comprises 0.001 to 1.0 part by weight of antifoaming agent relative to 100
parts by weight of polymer in the polymer latex.
Method and apparatus for forming a non-pneumatic tire carcass
U.S. patent: 11,926,114
Issued: March 12, 2024
Inventors: David C. Lung, Michael Widmyer and Eric Rivers
Assigned: Michelin
Key statement: This disclosure includes methods and apparatus for forming
a non-pneumatic tire carcass comprising an inner hub, an outer band and a
plurality of spokes. The method includes arranging the inner hub, the
plurality of spokes and the outer band to form a curing assembly arranged
in a first arrangement within a forming apparatus, where the inner hub is
arranged concentrically within a radially inner annular side of the outer
band and the plurality of spokes are arranged between the outer band and
the inner hub. The plurality of spokes are forced in opposite radial
directions from the first arrangement and to a second arrangement, where
each spoke of the plurality of spokes is forced in a curing position against
the inner hub and towards the outer band in a curing arrangement. The
plurality of spokes are then cured to each of the inner hub and outer band.
Silicone rubber molded article and method for manufacturing same
U.S. patent: 11,926,721
Issued: March 12, 2024
Inventors: Tomoki Matsumura, Keisuke Kawahama and Makoto Iwai
Assigned: Fuji Polymer Industries
Key statement: Provided is a silicone rubber molded body (1) including a
conductive ink coating layer (3) that is disposed on a portion of the surface
of the silicone rubber molded body (1). The conductive ink coating layer (3)
contains a hydrolyzable organosilicon compound. Using the silicone rubber
molded body with a saturated water absorption of 0.10 to 1.50% by mass
and/or using a conductive ink containing water improves the affinity
between the surface of the silicone rubber molded body (1) and the
conductive ink coating layer (3). A residual ink area is an average of 20% or
more and 100% or less after the conductive ink coating layer (3) is subjected
to an abrasion test. With this configuration, the silicone rubber molded body
has a high affinity between the silicone rubber and the conductive ink, good
durability under continuous stress and stability in long term use. Further
provided is a method for producing the silicone rubber molded body.
Rubber-reinforcing cord and rubber product using same
U.S. patent: 11,932,738
Issued: March 19, 2024
Inventor: Tatsuya Yamaguchi
Assigned: Nippon Sheet Glass
Key statement: A rubber-reinforcing cord of the present invention is a
rubber- reinforcing cord for reinforcing a rubber product. The rubberreinforcing cord includes at least one strand. The strand includes at least
one filament bundle and a coating provided to cover at least a portion of a
surface of the filament bundle. The coating includes a rubber component
and a crosslinking agent. The crosslinking agent includes two or more
isocyanate compounds.
Polymer-filler composites with guayule rubber
U.S. patent: 11,932,759
Issued: March 19, 2024
Inventors: Michael R. Hartzell, Robert W. White, Piotr Kozminski, Mark N.
Dedecker, Erin Sheepwash, Yingyi Huang and William S. Niaura
Assigned: Bridgestone
Key statement: A method for forming a polymer-filler composite having
advantageous bound filler content, the method comprising (a) providing a
guayule cement; (b) introducing particulate filler to the guayule cement to
form a solution masterbatch; and (c) desolventizing the solution
masterbatch to form a polymer-filler composite.
Color rubber composition for tire and tire
U.S. patent: 11,932,760
Issued: March 19, 2024
Inventor: Daiki Tomori
Assigned: Toyo Tire
Key statement: A color rubber composition for tires according to an
embodiment contains a rubber component, a pigment other than black or
white, a petroleum wax and a white filler. The petroleum wax has a normal/
iso ratio (mass ratio) of 70/30 to 90/10. The carbon number distribution for
iso components in the whole petroleum wax is 1.0% or less for 25 or less
carbon atoms, 4.0 to 8.0% for 26 to 32 carbon atoms, 5.0 to 15.0% for 33 to
44 carbon atoms and 1.0% or more for 45 or more carbon atoms. The
carbon number distribution for normal components in the whole petroleum
wax is 5.0 to 18.0% for 25 or less carbon atoms, 40.0 to 48.0% for 26 to 32
carbon atoms, 15.0 to 27.5% for 33 to 44 carbon atoms and 2.0% or more
for 45 or more carbon atoms.
Diene based rubber latex, method for preparing thereof and graft copolymer with core-shell structure comprising the same
U.S. patent: 11,932,709
Issued: March 19, 2024
Inventors: Chang Hong Bak, Young Hwan Jeong and Young Min Kim
Assigned: LG Chem
Key statement: The present invention relates to a diene based rubber latex
including a polymer aggregate and having an extra large diameter, a
method for preparing same and a graft copolymer with a core-shell
structure, including same and having excellent impact strength and surface
properties. A diene based rubber latex of which 14 weight % to 26 weight %
has a diameter of 100 nm to less than 300 nm, 62 weight % to 81 weight %
has a diameter of 300 nm to less than 800 nm and 5 weight % to 14 weight
% has a diameter of 800 nm to less than 1,000 nm, based on 100 weight %
of total rubber particles.
Tire comprising a textured tread
U.S. patent: 11,926,178
Issued: March 12, 2024
Inventors: Olivier Muhlhoff, Hélène Emorine, Arnaud Larregain and Nicolas Levy
Assigned: Michelin
Key statement: Tire (1) comprising a tread (8), the tire comprising at least
one groove (2), at least one wear indicator (3) disposed in the groove (2), the
wear indicator comprising a contact face (7) intended to come into contact
with a roadway when the tire reaches a wear limit, the groove (2) comprising
a texture (4) produced integrally with a bottom (10) of this groove (2), said
texture (4) surrounding the wear indicator (3) and contrasting with the
contact face (7) of the wear indicator.
Method for producing fiber for reinforcing rubber
U.S. patent: 11,939,437
Issued: March 26, 2024
Inventor: Yoshifumi Suzuki
Assigned: Teijin Frontier
Key statement: A method for producing a fiber for reinforcing rubber,
comprising applying an adhesion treatment liquid containing a
thermoplastic elastomer, a blocked polyisocyanate and a rubber latex to a
fiber cord to obtain a fiber for reinforcing rubber, wherein the thermoplastic
elastomer is incorporated in the form of a water dispersion into the
adhesion treatment liquid, wherein the thermoplastic elastomer particles in
the water dispersion have an average particle diameter of 0.01 to 1.0 μm.
Rubber composition, method for preparing same, fuel hose and fuel feed circuit incorporating same
U.S. patent: 11,932,755
Issued: March 19, 2024
Inventors: Elise Laborbe, Mélissande Bichat, Antoine Pichon and Laurent Delas
Assigned: Hutchinson
Key statement: The invention relates in particular to a rubber composition
able to be extruded to form an inner layer of a fuel hose for a motor vehicle,
a method for preparing this composition, this hose and a fuel feed circuit of
a motor vehicle incorporating it. This composition is based on at least one
fluoroelastomer (FKM) and includes a filler and a micronized powder of at
least one fluorinated thermoplastic polymer which are dispersed in said at
least one fluoroelastomer. According to the invention, the composition
includes said micronized powder according to a quantity greater than 20
phr (phr: parts by weight per 100 parts of elastomer[s]), and the filler
includes at least one inorganic filler having lamellas which has an aspect
ratio greater than 30 and which is based on a phyllosilicate chosen from
kaolinite and micas, or is based on a talc.
Liquid silicone rubber composition
U.S. patent: 11,939 471
Issued: March 26, 2024
Inventors: Yusheng Chen, Peng Wang, Shaohui Wang, Rui Wang, Jianjun Gao
and Chunming Zhang
Assigned: Dow Silicones
Key statement: Addition curing electrically conductive liquid silicone rubber
(LSR) compositions, their methods of preparation and cured elastomeric
products made from the compositions are provided. The compositions are
cured to form elastomeric products suitable for high voltage applications
such as cable joints, cable terminal applications, cable accessories and
connectors. In general, the composition comprises: (a) at least one
polydiorganosiloxane having at least two alkenyl groups per molecule; (b) at
least one organohydrogenpolysiloxane; (c) at least one reinforcing filler; (d)
at least one hydrosilylation catalyst; and (e) an electrically conductive filler.
Component (e) comprises: (i) extra conductive carbon black; and (ii) single
walled carbon nanotubes.