Abstract: A surface-treated nanocellulose master batch includes a rubber component, a nanocellulose, a resole or novolac resorcin-formaldehyde initial condensation product, and formaldehyde. The the surface-treated nanocellulose master batch includes from 0.3 to 15 parts by mass of the nanocellulose per 100 parts by mass of the rubber component. The the surface-treated nanocellulose master batch includes from 0.03 to 1.2 parts by mass of the resole or novolac resorcin-formaldehyde initial condensation product per 1 part by mass of the nanocellulose and 0.02 to 0.8 parts by mass of the formaldehyde per 1 part by mass of the nanocellulose.

Abstract: Provide is a rubber composition for a tire that improves mechanical properties beyond conventional levels. The rubber composition for a tire according to an embodiment of the present invention contains from 1 to 50 parts by mass of oxidized cellulose nanofibers blended in 100 parts by mass of diene rubber containing 5% by mass or greater of modified diene rubber having 0.1% by mol or greater of a polar group.

Abstract: An object of the present invention is to provide a thermosetting resin composition having superior toughness. The thermosetting resin composition of the present invention includes a thermosetting resin, and an adsorbing filler in which a thermoplastic resin C is adsorbed on a filler, wherein an adsorption coefficient that is greater than 0 and less than or equal to 0.8, defined by Formula 1 is satisfied. Formula 1: Adsorption coefficient={Amount (parts by mass) of the thermoplastic resin C adsorbed on 100 parts by mass of the filler/specific gravity of the thermoplastic resin C}/DBP oil absorption (mL/100 g) of the filler.

Abstract: The present invention provides an epoxy resin composition for a fiber reinforced composite material comprising an epoxy resin (A) comprising an epoxy resin (a1) having a weight average molecular weight of up to 1,000 and an epoxy resin (a2) having a weight average molecular weight of 10,000 to 100,000 which contains at least 20% by weight of the basic skeleton of the epoxy resin (a1), a thermoplastic resin (B), and a curing agent (C). The cured composition has a co-continuous phase of the epoxy resin (A) and the thermoplastic resin (B) and/or a continuous phase of the thermoplastic resin (B). A cured product having a high toughness can be obtained from this epoxy resin composition.

Abstract: An object of the present invention is to provide a thermosetting resin composition having superior toughness. The thermosetting resin composition of the present invention includes a thermosetting resin, and an adsorbing filler in which a thermoplastic resin C is adsorbed on a filler, wherein an adsorption coefficient that is greater than 0 and less than or equal to 0.8, defined by Formula 1 below, is satisfied. Adsorption coefficient=Amount(parts by mass)of the thermoplastic resin C adsorbed on 100 parts by mass of the filler/specific gravity of the thermoplastic resin C/DBP oil absorption(mL/100 g)of the filler.

Abstract: The present invention provides an epoxy resin composition for a fiber reinforced composite material comprising an epoxy resin (A) comprising an epoxy resin (a1) having a weight average molecular weight of up to 1,000 and an epoxy resin (a2) having a weight average molecular weight of 10,000 to 100,000 which contains at least 20% by weight of the basic skeleton of the epoxy resin (a1), a thermoplastic resin (B), and a curing agent (C). The cured composition has a co-continuous phase of the epoxy resin (A) and the thermoplastic resin (B) and/or a continuous phase of the thermoplastic resin (B). A cured product having a high toughness can be obtained from this epoxy resin composition.

Abstract: A process for production of a modified carbon black, at a cheaper cost, for rubber reinforcement having the superior tan ? temperature dependency of silica and an excellent abrasion resistance and further having no problems arising due to a low electrical conductivity is provided. In the process for production of a modified carbon black for rubber reinforcement wherein, in the step of granulating the carbon black, a water-dispersed silica is added to the carbon black, the granulating is performed by a granulator and a process of production of a rubber composition containing a surface-treated carbon black for rubber reinforcement comprising coagulating, with a coagulating agent, a mixture of (a) 100 parts by weight, as a solid content, of a diene rubber component and (b) 10 to 250 parts by weight, as a solid content, of a slurry containing a carbon black for rubber reinforcement or (b?) 10 to 250 parts by weight of a modified carbon black produced by the above method.

Abstract: A process for production of a modified carbon black, at a cheaper cost, for rubber reinforcement having the superior tan ? temperature dependence of silica and an excellent abrasion resistance and further having no problems arising due to a low electrical conductivity is provided granulating the carbon black, after or while adding a water-dispersed silica to the carbon black in a granulator.

Abstract: A rubber composition comprising (i) an incompatible polymer blend of at least two diene rubbers selected from rubbers containing a conjugated diene and, optionally, an aromatic vinyl monomer and forming two polymer phases (A) and (B), and (ii) 0.1 to 20 parts by weight, based upon 100 parts by weight of the total polymer component including the block copolymer, of a block copolymer having at least two mutually incompatible blocks (a) and (b), wherein the block (a) is compatible with the polymer phase (A) and incompatible with the polymer phase (B) and the block (b) is compatible with the polymer phase (B) and incompatible with the polymer phase (A), and composed of a conjugated diene and, optionally, an aromatic vinyl monomer, and wherein the molecular weights of the polymers forming the polymer phases (A) and (B) satisfy the specified equations (I) and (II) mentioned in the specification.

Abstract: A process for production of a modified carbon black, at a cheaper cost, for rubber reinforcement having the superior tan &dgr; temperature dependency of silica and an excellent abrasion resistance and further having no problems arising due to a low electrical conductivity is provided.

Abstract: A rubber composition comprising (i) an incompatible polymer blend of at least two diene rubbers selected from rubbers containing a conjugated diene and, optionally, an aromatic vinyl monomer and forming two polymer phases (A) and (B), and (ii) 0.1 to 20 parts by weight, based upon 100 parts by weight of the total polymer component including the block copolymer, of a block copolymer having at least two mutually incompatible blocks (a) and (b), wherein the block (a) is compatible with the polymer phase (A) and incompatible with the polymer phase (B) and the block (b) is compatible with the polymer phase (B) and incompatible with the polymer phase (A), and composed of a conjugated diene and, optionally, an aromatic vinyl monomer, and wherein the molecular weights of the polymers forming the polymer phases (A) and (B) satisfy the specified equations (I) and (II) mentioned in the specification.

Abstract: A rubber composition comprising (i) an incompatible polymer blend of at least two diene rubbers selected from rubbers containing a conjugated diene and, optionally, an aromatic vinyl monomer and forming two polymer phases (A) and (B), and (ii) 0.1 to 20 parts by weight, based upon 100 parts by weight of the total polymer component including the block copolymer, of a block copolymer having at least two mutually incompatible blocks (a) and (b), wherein the block (a) is compatible with the polymer phase (A) and incompatible with the polymer phase (B) and the block (b) is compatible with the polymer phase (B) and incompatible with the polymer phase (A), and composed of a conjugated diene and, optionally, an aromatic vinyl monomer, and wherein the molecular weights of the polymers forming the polymer phases (A) and (B) satisfy the specified equations (I) and (II) mentioned in the specification.

Abstract: A block copolymer (1) containing a polymer block A of a conjugated diene and a random copolymer block B of a conjugated diene and aromatic vinyl compound, (2) having a weight ratio (A:B) of the polymer block A and the copolymer block B of 5:95 to 95:5, (3) having a bound aromatic vinyl compound content in the copolymer block B of 1 to 50% by weight, (4) having a weight average molecular weight (Mw) of 100,000 to 5,000,000, and (5) having at least two transition points measured by differential scanning calorimetry in the range of −150° C. to +150° C., a method of production of the same, and a rubber composition and pneumatic tire containing the same.

Abstract: A process for production of a modified carbon black, at a cheaper cost, for rubber reinforcement having the superior tan &dgr; temperature dependency of silica and an excellent abrasion resistance and further having no problems arising due to a low electrical conductivity is provided.

Abstract: A block copolymer (1) containing a polymer block A of a conjugated diene and a random copolymer block B of a conjugated diene and aromatic vinyl compound, (2) having a weight ratio (A:B) of the polymer block A and the copolymer block B of 5:95 to 95:5, (3) having a bound aromatic vinyl compound content in the copolymer block B of 1 to 50% by weight, (4) having a weight average molecular weight (Mw) of 100,000 to 5,000,000, and (5) having at least two transition points measured by differential scanning calorimetry in the range of −150° C. to +150° C., a method of production of the same, and a rubber composition and pneumatic tire containing the same.

Abstract: A process for producing surface-treated carbon black for rubber reinforcement comprising: a surface treatment reaction step of dispersing carbon black for rubber reinforcement in water, followed by reacting a metal silicate and an acid in the dispersion to thereby deposit amorphous silica on the surface of the carbon black; and a subsequent aging step of bringing the pH of the dispersion to not more than 7.

Abstract: A rubber composition containing at least one rubber component containing a diene rubber and a rubber reinforcing carbon black having silica deposited on the surface thereof.

Abstract: A rubber composition for a tire, comprising at least one compound selected from the group consisting of ascorbic acid and derivatives thereof, tocopherols, and citric acid and derivatives thereof.

Abstract: A rubber composition suitable for use, for example, a tire and a belt containing a natural and/or polyisoprene rubber, and/or styrene-butadiene copolymer rubber, polybutadiene rubber, and/or an A-B type block copolymer of styrene and butadiene and optionally, a softening agent, a foaming agent, a foaming assistant.

Abstract: A rubber composition containing a cross-linkable rubber component and a carbon black having silica adhered to the surface thereof and a silica surface-treated carbon black suitable for use in tire tread where the surface-treated carbon black has a nitrogen specific surface area (N.sub.2 SA) of 20 to 300 m.sup.2 /g, a ratio IA.sub.o /IA.sub.f of the adsorption amount of iodine (IA.sub.o) and the adsorption amount of iodine after treatment by hydrogen fluoride (IA.sub.f) of at least 0.30 but less than 1.0, and a ratio IA.sub.e /IA.sub.ef of the adsorption amount of iodine after extraction from a rubber compound (IA.sub.e) and the value of the same after treatment by hydrogen fluoride (IA.sub.ef) of at least 0.30 but less than 1.0.