Patents for August
Patent News as compiled by the editors of Rubber World Magazine for August 2023.
Butyl rubber reactive bonding layer for pre-paving reactive-bonding waterproofing coiled material,
preparation method thereof and pre-paving reactive-bonding waterproofing coiled material
U.S. patent: 11,655,401
Issued: May 23, 2023
Inventors: Yuqin Xiong, Ning Yang, Ning Tan and Yang Liu
Assigned: Beijing Oriental Yuhong Waterproof Technology
Key statement: A butyl rubber reactive bonding layer for a pre-applied reactive- bonding waterproofing
coiled material, a preparation method thereof and a pre-applied reactive-bonding waterproofing coiled
material, relating to the technical field of high molecular pre-applied materials, are disclosed. The butyl
rubber reactive bonding layer is prepared mainly from the following raw materials: 100 parts of a raw
rubber, 9.5-15.5 parts of a linear tackifier containing a terminal hydroxyl structure and 12.5-19.5 parts of
an active filler. The active filler includes active silicon dioxide and aluminium oxide.
Cable for a tire
U.S. patent: 11,655,586
Issued: May 23, 2023
Inventors: Fanny Layec, Rèmi Pinaut, Marie Chassagne and Laurent Bucher
Assigned: Michelin
Key statement: A cable as may be used in a tire, including a pneumatic tire. The cable is constructed in a
manner that can provide a desired stiffness to a tire, as well as a certain amount of structural elongation.
The cable can be provided in a manner that does not necessarily result in an increase in the overall
weight of the tire as would occur by, e.g., increasing the diameter of a conventional cable construction.
High performance rubber damping material and method for preparing the same
U.S. patent: 11,661,467
Issued: May 30, 2023
Inventors: Hongchao Liu, Heping Yu, Qifang Wang, Yongzhen Li and Zheng Peng
Assigned: Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural
Sciences
Key statement: The present disclosure discloses a high performance rubber damping material and a
method for preparing the same, relating to the technical field of damping materials. The method for
preparing the high performance rubber damping material includes: grafting hydroxyethyl methacrylate
and lignin to a rubber molecular chain of natural rubber latex through graft copolymerization reaction, so
as to obtain a high performance rubber damping material. This method adopts natural rubber latex as a
base material; the hydroxyethyl methacrylate and lignin are grafted to the rubber molecular chain of
natural rubber latex through graft copolymerization reaction to form a semi-interpenetrating network
structure.
Silica reinforced rubber composition containing a multi-functional group functionalized elastomer and
tire with tread
U.S. patent: 11,661,500
Issued: May 30, 2023
Inventors: George Jim Papakonstantopoulos, Aaron Patrick Murray, Bruce Raymond Hahn and Teresa
Diane Martter
Assigned: Goodyear Tire & Rubber
Key statement: This invention relates to a rubber composition containing filler reinforcement comprised
of precipitated silica with silica coupling agent therefore and conjugated diene based elastomer which
contains end chain functionalization with multi-functional groups. The groups functionalizing the
elastomer are multi-functional in the sense of containing one group reactive with at least one of said
precipitated silica and silica coupling agent and another different group reactive with diene based
elastomers through sulfur cure of the rubber composition. A sulfur cured rubber composition containing
said end chain functionalization is provided. A tire is provided having a component comprised of said
rubber composition. Representative of said tire component is a tire tread.
Process for preparing compounds for tires and tires comprising them
U.S. patent: 11,661,498
Issued: May 30, 2023
Inventors: Antonio Susanna, Raffaella Donetti, Luca Giannini, Thomas Hanel, Roberto Scotti and Barbara
Di Credico
Assigned: Pirelli Tyre S.p.A.
Key statement: The present invention relates to a process for preparing a vulcanizable elastomeric
compound for tires, characterized by the use of a particular vulcanization-activating filler and by the
methods of adding additives, in particular the compatibilizing agent (silane), which occurs only after
completion of the reaction between the activating filler comprising zinc and the fatty acid (stearic acid).
The present process, advantageous in itself due to the possible reduction of the times and of the energy
required for vulcanization, allows preparing compounds which, with the same performances compared
to the traditional ones, can have a reduced zinc content and consequently a lower release thereof from
tires during use at an environmental level.
Fluoropolymer thermoplastic elastomer
U.S. patent: 11,661,508
Issued: May 30, 2023
Inventors: Ramin Amin-Sanayei, Samuel Devisme, Florent Abgrall, Jerome Chauveau, Anthony Bonnet and
Gregory O’Brien
Assigned: Arkema
Key statement: The invention relates to an object or object part made from a composition comprising at
least one fluoropolymer F, wherein: the at least one fluoropolymer F comprises vinylidene fluoride units
and at least 30 wt.% of units derived from at least one monomer of formula (I): (I) CX1X2═CX3Y, wherein
each of X1, X2 and X3 is independently selected from H, Cl, F, Br, I and alkyl groups comprising from 1 to
3 carbon atoms which are optionally partly or fully halogenated and Y is an alkyl group comprising from 1
to 3 carbon atoms which is optionally partly or fully halogenated; the proportion of the at least one
fluoropolymer F in the composition is at least 80 wt.%; and the viscosity of the composition is at least
1,000 Pa·s at a temperature of 230°C and at a shear rate of 100 s-1.
Resin modified vegetable oils in rubber compositions and tires
U.S. patent: 11,667,775
Issued: June 6, 2023
Inventors: Kelsey Elizabeth Cantwell, Stephan Rodewald, Joseph John Kulig and Paul Harry Sandstrom
Assigned: Goodyear Tire & Rubber
Key statement: The present invention is directed to the use of modified vegetable oils in rubber
compositions and in tires.