Abstract: A sulfur-vulcanizable rubber composition containing 100 parts by weight of a diene-based rubber, 1 to 30 parts by weight of an ester-based plasticizer having a saturated cyclic structure of the formula (I): wherein R1 and R2 independently indicate a hydrogen atom or a C1 to C18 organic group and 40 to 120 parts by weight of a reinforcing filler and a pneumatic tire using the same.

Abstract: [Objects] To make it possible to carry out automatically and accurately a laminating operation of an optical element to a sheet-shaped body. [Means for Accomplishing the Objects] A strip-shaped polarizing film has a protective film strip conformably adhered to one surface thereof and a releasable liner conformably adhered to the other surface thereof and delivered from a film delivering station 1. After an appearance inspection, a lamination of the protective film strip and the polarizing film strip F is half-cut using a laser unit 11 to form an array of laminations each consisting of a protective film and a polarizing film F, with the releasable liner being left intact. Then, the polarizing films F are fed to a peeling mechanism 4. The peeling mechanism 4 feeds a forwardmost one the polarizing films F to a laminating mechanism 5 while peeling off the releasable liner therefrom by a knife-edged member.

Abstract: A rubber composition containing 100 parts by weight of a diene-based rubber, 20 to 120 parts by weight of silica, 3 to 15% by weight, based upon the weight of silica, of a sulfur-containing silane coupling agent and (A) 1,5-diazabicyclo[4,3,0]nonene-5 (DBN) having the formula (I): and/or a salt thereof or (B) 0.1 to 3.0 parts by weight of a compound having a piperidine skeleton having the formula (II) or a salt thereof and/or formula (III): wherein n indicates 3 or 5, R1 indicates CH or N and R2 indicates H or OH when R1 is CH, or H when R1 is N, and a melamine derivative of formula (IV): wherein R3 is a methoxymethyl group (—CH2OCH3) or methylol group (—CH2OH), the number of methoxymethyl groups is 3 to 6, and the number of methylol groups is 0 to 3, and/or polymer or copolymer resins of the same and a pneumatic tire using the same.

Abstract: Disclosed is a sulfur-containing conjugated diolefin copolymer rubber composed of a conjugated diolefin and an aromatic vinyl compound, wherein (1) the content of sulfur bound to the rubber is 0.01 mmol % or more, (2) the content of the aromatic vinyl compound polymerization unit is not less than 5 wt % and less than 45 wt % relative to the amount of the copolymer rubber, and (3) the content of a vinyl bond (a 1,2-bond) in the conjugated diolefin polymerization unit is 30 mol % or more relative to the amount of the conjugated diolefin polymerization unit. In the the copolymerization between the conjugated diolefin and the aromatic vinyl compound, a specific sulfur-containing polymerization terminator is used to terminate the reaction of the copolymerization. The sulfur-containing conjugated diolefin copolymer rubber has good processability and a good balance among wear resistance, fracture properties and low hysteresis loss.

Abstract: A rubber composition, superior in the processability and rubber properties compared with a rubber composition using a conventional mercaptosilane coupling agent, containing 100 parts by weight of a diene-based rubber, 10 to 160 parts by weight of a reinforcing filler containing silica and 0.1 to 20% by weight, based upon the weight of silica, of a mercaptosilane coupling agent blocked with a compound having a vinyl ether group and a pneumatic tire using the same.

Abstract: A pneumatic tire with superior durability having a tread part comprising a cap tread layer (layer A) and an under tread layer (layer B), wherein, in the pneumatic tire, when storage elastic moduli of the rubber compositions constituting the layer A and the layer B are designated as EA and EB, the storage elastic moduli EA (60° C.) and EB (60° C.) determined at a temperature of 60° C. satisfy the following formulae (1) and (2): EA(60° C.)/EB(60° C.)?0.66??(1) 10(MPa)?EB(60° C.

Abstract: Provided is a tire rubber composition blended with an antioxidant that is derived from a raw material other than petroleum resources, the tire rubber composition being capable of achieving an oxidation resistance equal to or higher than a conventional level and of improving forming processability and a low hysteresis loss property. The tire rubber composition includes a blend of: 100 parts by weight of a diene rubber; 5 to 130 parts by weight of an inorganic filler; and 0.01 to 10 parts by weight of a tea extract containing a catechin.

Abstract: A rubber composition containing 100 parts by weight of a diene-based rubber, 20 to 120 parts by weight of silica, 3 to 15% by weight, based upon the weight of silica, of a sulfur-containing silane coupling agent and (A) 1,5-diazabicyclo[4,3,0]nonene-5 (DBN) having the formula (I): and/or a salt thereof or (B) 0.1 to 3.0 parts by weight of a compound having a ppiperidine skeleton having the formula (II) or a salt thereof and/or formula (III): wherein n indicates 3 or 5, R1 indicates CH or N and R2 indicates H or OH when R1 is CH, or H when R1 is N, and a melamine derivative of formula (IV): wherein R3 is a methoxymethyl group (—CH2OCH3) or methylol group (—CH2OH), the number of methoxymethyl groups is 3 to 6, and the number of methylol groups is 0 to 3, and/or polymer or copolymer resins of the same and a pneumatic tire using the same.

Abstract: [Objects] To make it possible to carry out automatically and accurately a laminating operation of an optical element to a sheet-shaped body. [Means for Accomplishing the Objects] A strip-shaped polarizing film has a protective film strip conformably adhered to one surface thereof and a releasable liner conformably adhered to the other surface thereof and delivered from a film delivering station 1. After an appearance inspection, a lamination of the protective film strip and the polarizing film strip F is half-cut using a laser unit 11 to form an array of laminations each consisting of a protective film and a polarizing film F, with the releasable liner being left intact. Then, the polarizing films F are fed to a peeling mechanism 4. The peeling mechanism 4 feeds a forwardmost one the polarizing films F to a laminating mechanism 5 while peeling off the releasable liner therefrom by a knife-edged member.

Abstract: A rubber composition, superior in the processability and rubber properties compared with a rubber composition using a conventional mercaptosilane coupling agent, containing 100 parts by weight of a diene-based rubber, 10 to 160 parts by weight of a reinforcing filler containing silica and 0.1 to 20% by weight, based upon the weight of silica, of a mercaptosilane coupling agent blocked with a compound having a vinyl ether group and a pneumatic tire using the same.

Abstract: A sulfur-vulcanizable rubber composition containing 100 parts by weight of a diene-based rubber, 1 to 30 parts by weight of an ester-based plasticizer having a saturated cyclic structure of the formula (I): wherein R1 and R2 independently indicate a hydrogen atom or a C1 to C18 organic group and 40 to 120 parts by weight of a reinforcing filler and a pneumatic tire using the same.

Abstract: A pneumatic tire using as a tread part, a rubber composition containing a high silica-content rubber composition having a difference F-S between an amount of filler F and an amount of a softening agent S of 60 to 90 parts by weight and having a durometer hardness measured at 20° C. of 65 to 76.

Abstract: A rubber composition for a tire containing 100 parts by weight of a rubber, 1 to 30 parts by weight of a polyether (E1) having the formula (I): R1-{OCH2CH2CH2CH2)m(OA)n—OH}q??(I) wherein R1 is a residue of a C1 to C24 compound having 1-6 hydroxyl groups, from which at least one hydroxyl group is removed, A Ls a C2 to C24 alkylene group other than a 1,4-butylene group, q is an integer of 1 to 6, and m and n are independently integers of 1 to 600, and/or the derivative thereof (E2) and 10 to 180 parts by weight of a filler, which is excellent in processability, silica dispersability abrasion resistance and wet braking performance, etc.

Abstract: A rubber composition for a tire having greatly shortened vulcanization time, good silica dispersibility and, after vulcanization, superior braking capability, abrasion resistance and low rolling resistance, comprising (A) 100 parts by weight of a conjugated diene-based rubber, (B) 90 to 150 parts by weight of a reinforcing filler containing silica, (C) 0 to 40 parts by weight of an oil, (D) 4 to 20% by weight, based upon the weight of the silica, a silane coupling agent having the formula (I): Y3Si—CnH2nA ??(I) wherein Y indicates a C1 to C25 alkyl or alkoxyl group or a chloro group, the three Y's may be the same or different, n is an integer of 1 to 6, A is a mercapto group or SmZ group, where Z is the group: and m is an integer of 1 to 6) (E) sulfur, and (F) 0.05 to 5 parts by weight of a thiuram disulfide-based vulcanization accelerator having the formula (II): wherein R5, R6, R7 and R8 are independently hydrocarbon groups having 2 to 18 carbon atoms, is provided.

Abstract: A rubber component containing at least one a diene-based rubber in an amount of 100 parts by weight and a surface-treated silica treated, on the surface thereof, with at least one silane coupling agent X represented by formula (I): wherein Y independently indicate a methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy or acetoxy group, R indicates a C1 to C18 hydrocarbon group selected from a linear, cyclic or branched alkyl group, alkenyl group, aryl group, and aralkyl group and a rubber composition containing the same.