Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a liquid resin having a softening point of ?20 to 20° C., wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component.

Abstract: The invention aims to provide a tire rubber composition that is excellent in the low heat build-up property (fuel economy), wet grip performance, and abrasion resistance, and can be suitably used for a tread (cap tread); and a tire rubber composition that is excellent in the low heat build-up property and breaking properties, and can be suitably used for a base tread or sidewall.

Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a compound represented by formula (1) below, wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component.

Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and processability in a balanced manner, and also provides a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a compound represented by formula (1) below, wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component.

Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a silane coupling agent, wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component; and the silane coupling agent contains a mercapto group.

Abstract: A surface acoustic wave filter device uses a Rayleigh wave as a main mode, and includes a ladder type surface acoustic wave filter unit. A thickness of a dielectric layer in a surface acoustic wave resonator configuring a series arm resonator is different from thickness of a dielectric layer in a surface acoustic wave resonator configuring a parallel arm resonator. A propagation orientation of a surface acoustic wave in the surface acoustic wave resonator configuring the series arm resonator is different from a propagation orientation of a surface acoustic wave in the surface acoustic wave resonator configuring the parallel arm resonator.

Abstract: The present invention provides a rubber composition for a tire, which improves in fuel economy, wet grip performance, and abrasion resistance; and a pneumatic tire using the same. The present invention relates to a rubber composition for a tire, including: a rubber component including a modified styrene butadiene rubber that contains a constitutional unit derived from a specific nitrogen-containing compound in a main chain; silica; and a specific silane coupling agent.

Abstract: The present invention provides a rubber composition for a tire, which results in both excellent fuel economy and high wet grip performance as well as good abrasion resistance; and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for a tire, the rubber composition containing a modified styrene butadiene rubber formed using a specific nitrogen-containing compound as a monomer, silica, and a specific amount of a diene rubber gel.

Abstract: A ladder filter including a series arm resonator and a parallel arm resonator disposed on the same common piezoelectric substrate achieves improved miniaturization. The ladder filter includes series arm resonators and parallel arm resonators, which include elastic wave resonators, and are disposed on the same common piezoelectric substrate, at least one parallel arm resonator of the series arm resonators and the parallel arm resonators includes a first resonator and a second resonator electrically connected in parallel to each other, and the first resonator and the second resonator are arranged in parallel or substantially in parallel in a direction perpendicular or substantially perpendicular to an elastic wave propagation direction, on one side outside one series arm resonator of remaining resonators in the elastic wave propagation direction thereof.

Abstract: The invention provides a rubber composition for a tire which has the great advantages of low heat build-up (high fuel economy), high wet grip performance, and high abrasion resistance, and a pneumatic tire with a tire component (especially, a tread) formed from the rubber composition.

Abstract: It is an object of the present invention to provide a tire rubber composition excellent in performances such as silica dispersibility and processability. The present invention relates to a tire rubber composition, comprising: a rubber component; silica; and a silane coupling agent, wherein the silica has a CTAB specific surface area of 180 m2/g or more and a BET specific surface area of 185 m2/g or more, and the silane coupling agent is a copolymer comprising units A represented by formula (1) and units B represented by formula (2), and the proportion of the units B is 1 to 70 mol % of the total molar amount of the units A and the units B.

Abstract: The present invention has its object to provide a rubber composition that can be used for a tread to supply a tire having both low heat build-up property and good wet grip performance. The present invention relates to a rubber composition including: silica and a rubber component that contains a modified butadiene rubber having a vinyl content of 35% by weight or less and having, in a main chain thereof, a constitutional unit derived from a specific nitrogen-containing compound, wherein an amount of the modified butadiene rubber is 5 to 45% by weight per 100% by weight of the rubber component, and wherein an amount of the silica is 10 to 150 parts by weight per 100 parts by weight of the rubber component.

Abstract: The present invention provides a rubber composition for a tire which can achieve both high levels of fuel economy and abrasion resistance, as well as excellent wet grip performance; and a pneumatic tire produced using the rubber composition. The rubber composition for a tire includes a rubber component that includes 5% by mass or more of a modified styrene butadiene rubber containing a constitutional unit derived from a specific nitrogen-containing compound in a main chain, based on 100% by mass of the rubber component; silica; and a compound represented by the following formula (I): R20—S—S-A-S—S—R21 ??(I) wherein A represents a C2 to C10 alkylene group, and R20 and R21 are the same as or different from each other, each representing a monovalent organic group that contains a nitrogen atom.

Abstract: A ladder filter including a series arm resonator and a parallel arm resonator disposed on the same common piezoelectric substrate achieves improved miniaturization. The ladder filter includes series arm resonators and parallel arm resonators, which include elastic wave resonators, and are disposed on the same common piezoelectric substrate, at least one parallel arm resonator of the series arm resonators and the parallel arm resonators includes a first resonator and a second resonator electrically connected in parallel to each other, and the first resonator and the second resonator are arranged in parallel or substantially in parallel in a direction perpendicular or substantially perpendicular to an elastic wave propagation direction, on one side outside one series arm resonator of remaining resonators in the elastic wave propagation direction thereof.

Abstract: The present invention provides a tire rubber composition which has good silica dispersibility and improves in terms of the reinforcement, the abrasion resistance, the mechanical strength, the rolling resistance, the wet grip performance, and the handling stability on a dry road surface in a balanced manner; and provides a pneumatic tire produced using the tire rubber composition. The present invention relates to a tire rubber composition, comprising: a rubber component; a first silica; and a second silica, wherein the first silica has a CTAB specific surface area of 180 m2/g or more, a BET specific surface area of 185 m2/g or more, and an aggregate size of 45 nm or more, and the second silica has a CTAB specific surface area of 95 m2/g or less, and a BET specific surface area of 100 m2/g or less.

Abstract: The present invention provides a tire rubber composition that enables improvement in fuel economy, wet grip performance, and abrasion resistance while maintaining good processability, and a pneumatic tire produced using the tire rubber composition. The tire rubber composition comprises: a rubber component including a diene polymer; silica; and a compound represented by the following formula (I), the diene polymer being a modified diene polymer obtained by reacting a compound (A) and a compound (B), the compound (A) being an active alkali metal-terminated conjugated diene polymer obtained by polymerizing a conjugated diene monomer alone or with an aromatic vinyl monomer, in the presence of a compound (C), the compound (B) being a modifying agent having a functional group, the compound (C) being a chemical species obtained by reacting an organic alkali metal compound with a compound represented by the following formula (1): the formula (I) being as follows.

Abstract: A rubber composition for a tire having improved in low fuel efficiency, wet skid performance, abrasion resistance, and steering stability with favorable balance, and tire which has tread, using the same. A rubber composition for a tire, comprising 30 to 150 parts by weight of silica having a nitrogen adsorbing-specific surface area of 20 to 200 m2/g, and a pH of 7.0 to 12.0 when the silica is dispersed in water to be 5% aqueous solution, based on 100 parts by weight of a rubber component, and a tire which has a tread, using the same.

Abstract: The invention aims to provide a tire rubber composition that is excellent in the low heat build-up property (fuel economy), wet grip performance, and abrasion resistance, and can be suitably used for a tread (cap tread); and a tire rubber composition that is excellent in the low heat build-up property and breaking properties, and can be suitably used for a base tread or sidewall.

Abstract: It is an object of the present invention to provide a tire rubber composition excellent in performances such as silica dispersibility and processability. The present invention relates to a tire rubber composition, comprising: a rubber component; silica; and a silane coupling agent, wherein the silica has a CTAB specific surface area of 180 m2/g or more and a BET specific surface area of 185 m2/g or more, and the silane coupling agent is a copolymer comprising units A represented by formula (1) and units B represented by formula (2), and the proportion of the units B is 1 to 70 mol % of the total molar amount of the units A and the units B.

Abstract: It is an object of the present invention to provide a tire rubber composition excellent in performances such as silica dispersibility and processability. The present invention relates to a tire rubber composition, comprising: a rubber component that contains an epoxidized natural rubber; silica; and a silane coupling agent, wherein the amount of the epoxidized natural rubber in 100% by mass of the rubber component is 15% by mass or more, the silica has a CTAB specific surface area of 180 m2/g or more and a BET specific surface area of 185 m2/g or more, and the silane coupling agent contains a mercapto group.