Sumitomo Rubber Industries Ltd.

Kōbe-shi, Japan

Sumitomo Rubber Industries Ltd.

Kōbe-shi, Japan

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Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-10-13

A purpose of the present invention is to provide a tire assuring that clogging of snow and sticking of snow are inhibited, particularly a tire assuring that clogging of snow and sticking of snow can be inhibited and having good performance on ice and snow and abrasion resistance without depending on the tread pattern form while maintaining wet grip performance and abrasion resistance. The tire is composed of a rubber composition which comprises a rubber component comprising a modified butadiene rubber and silica and has a pure water contact angle of from 125 to 140.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-10-19

Provided are a rubber composition that shows a balanced improvement in fuel economy and abrasion resistance while having good processability, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition containing: a rubber component including a copolymer containing a structural unit derived from a conjugated diene monomer, a structural unit derived from farnesene, and a structural unit derived from a compound represented by the formula (1) below; and carbon black and/or silica, wherein R^(11 )and R^(12 )are the same as or different from each other and each represent a hydrogen atom or a C1-C30 hydrocarbon group.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-05-17

A purpose of the present invention is to provide a tire assuring that clogging of snow and sticking of snow are inhibited, particularly a tire assuring that clogging of snow and sticking of snow can be inhibited and having good performance on ice and snow and abrasion resistance without depending on the tread pattern form while maintaining wet grip performance and abrasion resistance. The tire is composed of a rubber composition which comprises a rubber component comprising a modified butadiene rubber and silica and has a pure water contact angle of from 125 to 140.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-05-17

Provided are a rubber composition that shows a balanced improvement in fuel economy and abrasion resistance while having good processability, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition containing: a rubber component including a copolymer containing a structural unit derived from a conjugated diene monomer, a structural unit derived from farnesene, and a structural unit derived from a compound represented by the formula (1) below; and carbon black and/or silica,^(11) and R^(12) are the same as or different from each other and each represent a hydrogen atom or a C1-C30 hydrocarbon group.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-02-01

The present invention provides rubber compositions that can achieve both abrasion resistance and low heat build-up properties, and pneumatic tires including such rubber compositions. The present invention relates to a rubber composition containing one or more carbon blacks, at least one of which is produced from a feedstock oil that has a BMCI value of not greater than 150 and an aliphatic hydrocarbon content of not less than 30% by mass.


Patent
Sumitomo Rubber Industries Ltd., Japan National Institute of Advanced Industrial Science and Technology | Date: 2017-05-24

An object of the present invention is to provide a novel positive electrode which is produced using a rubber being an inexpensive material and is capable of enhancing a charge and discharge capacity and cyclability of a lithium-ion secondary battery, and the lithium-ion secondary battery composed of the positive electrode. In the lithium-ion secondary battery, the positive electrode comprises a current collector and an electrode layer formed on a surface of the current collector, the electrode layer comprises an active material, an electrically-conductive additive and a thermosetting resin binder subjected to thermosetting, and the active material comprises a sulfur-based positive-electrode active material prepared by heat-treating a starting material comprising a rubber and sulfur under a non-oxidizing atmosphere.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-05-31

Provided are a rubber or elastomer medical device that is excellent in sliding properties, low protein adsorption properties, low cell adsorption properties, and the durability of these properties (the ability to reduce deterioration of sliding properties, low protein adsorption properties, and low cell adsorption properties), and a method for producing the device. The present invention relates to a rubber or elastomer medical device having a surface treatment layer on at least a part of its rubber or elastomer surface, the surface treatment layer including a functional layer formed of a silane compound containing a polyoxyalkylene group, a metal salt-containing hydrophilic group, a halogen salt-containing hydrophilic group, or a fluorine-containing hydrophobic group.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-02-13

Provided is a pneumatic tire having improved air permeability resistance by improving adhesive property between an inner liner and a tire component adjacent thereto, reduced rolling resistance, and improved low temperature durability. The inner liner is composed of a polymer layer stack including a first layer containing an SIBS and a second layer containing at least one of an SIS and an SIB. At least one of the first layer and the second layer is a polymer composition containing one of a C4 polymer obtained by polymerizing a monomer unit having 4 carbon atoms, a layered clay mineral with an organic compound intercalated therein and at least one kind of rubber component selected from the group consisting of a natural rubber, an isoprene rubber and a butyl rubber. The second layer is arranged to come into contact with a rubber layer of the carcass ply. The inner liner has a thickness Ge at a shoulder position Pe exceeding 100% and being less than or equal to 500% of a thickness Gc at a crown central position Pc.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-07-19

[Problem to be solved] To provide a pneumatic tire that allows a change in an outer diameter to be reduced and is superior in steering stability and riding comfort. A belt 12 of a pneumatic tire 2 includes an inner layer 30 and an outer layer 32. The inner layer 30 and the outer layer 32 are each formed of a large number of parallel-aligned steel cords and a topping rubber. An inclination direction of the steel cords of the inner layer 30 and an inclination direction of the steel cords of the outer layer 32 are opposite to each other with respect to an equatorial plane. An inclination angle (s) of the steel cords of the inner layer 30 at an edge portion of the inner layer is larger than an inclination angle (c) of the steel cords of the inner layer 30 at the equatorial plane. An inclination angle (s) of the steel cords of the outer layer 32 at an edge portion of the outer layer is larger than an inclination angle (c) of the steel cords of the outer layer 32 at the equatorial plane. A difference between the inclination angle (s) and the inclination angle (c) of the inner layer 30 is larger than a difference between the inclination angle (s) and the inclination angle (c) of the outer layer 32.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-07-05

Provided is a rubber composition that can improve hysteresis loss to allow for simultaneous improvement in initial grip performance and stable grip performance during mid and late running while ensuring good abrasion resistance. The present invention relates to a rubber composition containing: a rubber component; sulfur; and a specific compound, the rubber composition containing 60% to 100% by mass of a diene rubber based on 100% by mass of the rubber component, the rubber composition containing 0.1 to 30 parts by mass of the specific compound per 100 parts by mass of the rubber component.

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