Abstract: The present invention is to provide a polymer modifying agent composition which provides a modified polymer that exhibits excellent low heat build-up when formed into a vulcanized product. The polymer modifying agent composition is a polymer modifying agent composition modifying a polymer having a carbon-carbon unsaturated bond, and containing (A) a nitrone having at least one carboxy group and (B) a fatty acid having 6 or more carbons.

Abstract: A rubber composition for tire bead insulation contains a diene rubber, a nitrone compound having a carboxy group, a carbon black and a white filler. The diene rubber contains a natural rubber and a styrene-butadiene rubber and the mass ratio of the contents of the natural rubber and the butadiene rubber is from 50:50 to 90:10. The content of the nitrone compound is from 0.1 to 10 parts by mass (PBM) per 100 PBM of total content of the diene rubber and the nitrone compound. The content of the carbon black is not less than 70 PBM per 100 PBM of the total above. The content of the white filler is not less than 20 PBM per 100 PBM of the total above. The total content of the carbon black and the white filler is from 90 to 180 PBM per 100 PBM of the total above.

Abstract: An object of the present invention is to provide an emulsion coagulant having excellent coagulation performance and a tire puncture repair kit that uses the emulsion coagulant. The emulsion coagulant of the present invention is an emulsion coagulant containing an ?-starch and an anionic polyacrylamide; a molecular weight of the anionic polyacrylamide being from 500,000 to 2,000,000; and a mass ratio (WA:WB) of a content (WA) of the ?-starch to a content (WB) of the anionic polyacrylamide being from 5:95 to 80:20.

Abstract: An object of the present invention is to provide an emulsion coagulant having excellent coagulation performance and a tire puncture repair kit that uses the emulsion coagulant. The emulsion coagulant of the present invention is an emulsion coagulant containing an ?-starch and an anionic polyacrylamide; a molecular weight of the anionic polyacrylamide being from 500,000 to 2,000,000; and a mass ratio (WA:WB) of a content (WA) of the ?-starch to a content (WB) of the anionic polyacrylamide being from 5:95 to 80:20.

Abstract: Disclosed is a liquid coagulant which can be injected into the inside of a tire without the need of removing the tire from a rim and which can prevent the scattering of a residue of a tire puncture sealing material when the tire is removed from the rim. The liquid coagulant can coagulate an emulsion that contains natural rubber latex and/or a synthetic resin emulsion. The liquid coagulant contains a foaming agent capable of foaming the emulsion. Also disclosed is a tire puncture sealant set including the coagulant and a method of coagulating a tire puncture sealant.

Abstract: An object of the present invention is to provide an emulsion coagulant capable of quickly coagulating an emulsion in an extremely low temperature environment. The present invention is an emulsion coagulant containing an amphoteric acrylic polymer, the amphoteric acrylic polymer having an amide group and a sulfonic acid group and having a weight average molecular weight of 30,000 or lower, and the emulsion coagulant being used to coagulate an emulsion. The present invention is also a tire puncture repair kit that uses the emulsion coagulant.

Abstract: A rubber composition for a bead filler contains a diene rubber, a carbon black and a nitrone compound having a carboxy group; the diene rubber contains a natural rubber and a styrene-butadiene rubber, wherein the content of the natural rubber in a total of the diene rubber and the nitrone compound is not less than 60 mass %, and the content of the styrene-butadiene rubber in a total of the diene rubber and the nitrone compound is not greater than 40 mass %; the content of the carbon black is 40 to 80 parts by mass per 100 parts by mass of a total of the diene rubber and the nitrone compound; and the content of the nitrone compound is 0.1 to 10 parts by mass per 100 parts by mass of a total of the diene rubber and the nitrone compound. Such rubber composition exhibits low heat build-up after vulcanization.

Abstract: A rubber composition for tire bead insulation contains a diene rubber, a nitrone compound having a carboxy group, a carbon black and a white filler. The diene rubber contains a natural rubber and a styrene-butadiene rubber and the mass ratio of the contents of the natural rubber and the butadiene rubber is from 50:50 to 90:10. The content of the nitrone compound is from 0.1 to 10 parts by mass (PBM) per 100 PBM of total content of the diene rubber and the nitrone compound. The content of the carbon black is not less than 70 PBM per 100 PBM of the total above. The content of the white filler is not less than 20 PBM per 100 PBM of the total above. The total content of the carbon black and the white filler is from 90 to 180 PBM per 100 PBM of the total above.

Abstract: A laminated body of rubber layers includes: a resin layer formed from a polyester resin or a polyamide resin; a rubber layer formed from a rubber composition containing a diene rubber; and an adhesive layer disposed between the resin layer and the rubber layer. The adhesive rubber composition contains a modified rubber composition (A) or a modified rubber composition (B) both having a number average molecular weight of 70,000 to 110,000. The modified rubber composition (A) is formed from a modified butyl rubber (1) formed by reacting, with a butyl rubber, a compound having in a molecule a nitroxide free radical that is stable at ambient temperature in the presence of oxygen, a radical initiator, and a co-crosslinking agent. The modified rubber composition (B) is formed by compounding the co-crosslinking agent with a modified butyl rubber (2) formed by reacting the compound and the radical initiator with the butyl rubber.

Abstract: The present invention is to provide a water-based primer composition that exhibits excellent adhesion toward an adherend such as mortar. This water-based primer composition contains a high molecular weight emulsion (A) which is an emulsion of a resin having a weight average molecular weight of 200,000 or higher, and a low molecular weight emulsion (B) which is an emulsion of a resin having a weight average molecular weight of 100,000 or lower, wherein an average particle diameter of the resin of the low molecular weight emulsion (B) is 0.6 ?m or less.

Abstract: An object of the present invention is to provide a rubber composition for a sidewall having excellent low heat build-up and durability when formed into a tire, and a pneumatic tire using the rubber composition. The rubber composition for a sidewall according to the present invention comprises a diene rubber and carbon black; the diene rubber comprising: a modified polymer obtained by reacting a nitrone compound with double bonds of a conjugated diene polymer; and a natural rubber; a content of the modified polymer in the diene rubber being from 8 to 65 mass %; a nitrogen adsorption specific surface area of the carbon black being from 20 to 60 [×103 m2/kg]; and a content of the carbon black being from 30 to 67 parts by mass per 100 parts by mass of the diene rubber.

Abstract: A rubber composition for a bead filler contains a diene rubber, a carbon black and a nitrone compound having a carboxy group; the diene rubber contains a natural rubber and a styrene-butadiene rubber, wherein the content of the natural rubber in a total of the diene rubber and the nitrone compound is not less than 60 mass %, and the content of the styrene-butadiene rubber in a total of the diene rubber and the nitrone compound is not greater than 40 mass %; the content of the carbon black is 40 to 80 parts by mass per 100 parts by mass of a total of the diene rubber and the nitrone compound; and the content of the nitrone compound is 0.1 to 10 parts by mass per 100 parts by mass of a total of the diene rubber and the nitrone compound. Such rubber composition exhibits low heat build-up after vulcanization.

Abstract: A rubber composition for coating a fiber cord includes a diene rubber, a carbon black, and a nitrone compound having a carboxy group; the diene rubber includes a natural rubber and a styrene-butadiene rubber and/or a butadiene rubber, wherein a content of the natural rubber in a total of the diene rubber and the nitrone compound is not greater than 65 mass %; a content of the carbon black is 40 to 67 parts by mass per 100 parts by mass of a total of the diene rubber and the nitrone compound; and a content of the nitrone compound is 0.1 to 10 parts by mass per 100 parts by mass of a total of the diene rubber and the nitrone compound. Such rubber composition for coating a fiber cord has excellent low heat build-up when a tire is produced and excellent adhesiveness with carcass cord.

Abstract: The present technology is a rubber composition for a tire comprising: a diene rubber; and a composite silica comprising a block copolymer and silica, the block copolymer comprising a first block obtained by polymerizing a first monomer containing at least a (meth)acrylate having a hydroxyl group and a second block obtained by polymerizing at least one type of a second monomer selected from the group consisting of styrene, derivatives thereof, and isoprene; the composite silica being produced in an organic solvent in the presence of the silica; and an amount of the composite silica being from 10 to 200 parts by mass per 100 parts by mass of the diene rubber; and a pneumatic tire using the same.

Abstract: The present invention provides a rubber composition for an undertread, the rubber composition achieving excellent low heat build-up and high elastic modulus when formed into a tire; and a pneumatic tire that includes the rubber composition. The rubber composition for an undertread contains a diene rubber and a carbon black. The diene rubber contains a natural rubber and a modified polymer that is obtained by reacting a nitrone compound with a double bond of a conjugated diene polymer. The content of the natural rubber in the diene rubber is 60 mass % or greater, the content of the modified polymer in the diene rubber is from 8 to 40 mass %, the content of the carbon black is from 30 to 67 parts by mass per 100 parts by mass of the diene rubber, and the nitrogen adsorption specific surface area of the carbon black is from 20 to 60 m2/g.

Abstract: A rubber composition for a tire rim cushion or rubber finishing contains a diene rubber and a filler containing a carbon black. The diene rubber contains a natural rubber and/or an isoprene rubber, and a modified polymer that is obtained by reacting a nitrone compound with a double bond of a conjugated diene polymer. The content of the natural rubber and/or the isoprene rubber in the diene rubber is from 30 to 60 mass %, the content of the modified polymer in the diene rubber is from 8 to 70 mass %, the content of the filler is from 60 to 90 parts by mass per 100 parts by mass of the diene rubber, and the nitrogen adsorption specific surface area of the carbon black is from 60 to 150 m2/g. Such rubber composition has excellent low heat build-up and ozone resistance when formed into a tire.

Abstract: An object of the present invention is to provide a modified polymer that can realize a rubber composition having excellent low heat build-up and that has excellent productivity, a rubber composition containing the modified polymer, and a tire produced using the rubber composition. The modified polymer of the present invention is obtained by reacting a modifier having a nitrone group and a carboxy group with a conjugated diene polymer not containing a tetrasubstituted olefin and/or a trisubstituted olefin.

Abstract: The invention provides a thermosetting resin composition that demonstrates superior peel strength while retaining excellent heat resistance and tensile shear adhesion strength. The thermosetting resin composition comprises: an epoxy resin A containing an epoxy group and a thermoplastic resin B containing a functional group f having reactivity with an epoxy group, the thermoplastic resin B being obtained by modifying a thermoplastic resin b1 containing an unsaturated bond with a nitrone b2 containing the functional group f, and the content of the nitrone b2 relative to the unsaturated bonds being not less than 0.5 mol % and less than 10 mol %, and the content of the thermoplastic resin B being from 10 to 50 parts by mass per 100 parts by mass of the epoxy resin A.

Abstract: An object of the present invention is to provide a tire puncture sealant excellent in sealing performance even in a small amount. The present invention is a tire puncture sealant which contains a synthetic resin emulsion A, and a natural rubber latex and/or a synthetic resin emulsion B, in which the surface free energy of the synthetic resin emulsion A is from 20 to 50 mJ/m2, and the solid content of the synthetic resin emulsion A is from 5 to 25 parts by mass per 100 parts by mass of the solid content of the natural rubber latex and/or the solid content of the synthetic resin emulsion B, and a tire puncture repair kit using the same.

Abstract: An object of the present invention is to provide a rubber composition capable of producing a pneumatic tire with both satisfactory heat build-up reduction and excellent wet skid performance, and a pneumatic tire comprising the rubber composition. The rubber composition of the present invention contains a diene-based rubber containing from 5 to 40 mass % of a modified butadiene rubber and a white filler. The modified butadiene rubber is a modified polymer obtained by modifying an unmodified butadiene rubber (A) with a nitrone compound (B) having a carboxy group.