Carbon black for use in anti-vibration compounds and components, anti-vibration bushings and engine mounts, together with such anti-vibration compounds and components and methods for the manufacture and use thereof.

A rubber composition that is capable of providing vulcanized rubber excellent in the abrasion resistance without the deterioration of the crack resistance and the low heat generation property is provided. The rubber composition contains: (A) a rubber component; (B) carbon black having a CTAB specific surface area of 110 to 160 m.sup.2/g, a half value width ΔD.sub.50 of a peak including a Stokes equivalent diameter D.sub.st obtained by a centrifugal sedimentation method of 60 nm or less, and ΔD.sub.50/D.sub.st of 0.95 or less; and (C) silica having a CTAB specific surface area of 200 m.sup.2/g or more, has a total amount of a content (b) of the carbon black (B) and a content (c) of the silica (C) of 30 to 80 parts by mass per 100 parts by mass of the rubber component (A), and has (b)/(c) of (60 to 85)/(40 to 15).

A carbon black wherein a nitrogen adsorption specific surface area (N.sub.2SA) is 25 to 60 m.sup.2/g, a DBP absorption number is 90 to 180 cm.sup.3/100 g, a ratio of the nitrogen adsorption specific surface area (N.sub.2SA) to an iodine adsorption number (IA) (N.sub.2SA/IA) is 1.10×10.sup.3 to 1.50×10.sup.3 m.sup.2/g, a hydrogen content by NMR is 150 to 250 /g, and ΔD is 260 to 290 cm.sup.−1.

Composite particles that super-aggregates of coated aggregates having low structure carbon black cores and metal/metalloid oxide mantles are described. Coatings containing filler-polymer compositions which have the composite particles as filler, such as curable coatings and cured coatings or films formed therefrom containing the filler-polymer compositions, with combinations of high resistivity, good optical density properties, good thermal stability, high dielectric constant, and good processability, along with their use in black matrices, black column spacers, light shielding elements in LCDs and other display devices, also are described. Inks containing the composite particle are described. Devices having these compositions, components and/or elements, and methods of preparing and making these various materials and products are described.

A positive electrode active material for a lithium ion secondary battery, the positive electrode active material having high capacity and exceptional coatability due to comprising both an oil absorption amount and powder physical properties suitable therefor. This positive electrode active material for a lithium ion secondary battery comprises a lithium transition metal composite oxide powder represented by compositional formula (1), having primary particles and secondary particles in which the primary particles are aggregated. In the positive electrode active material for a lithium ion secondary battery, the oil absorption amount, based on JIS K5101-13-1, of NMP (N-methyl-2-pyrrolidone) per 100 g of the lithium transition metal composite oxide powder is 19-30 mL/100 g, and the sphericity represented by the ratio AB of the short axis A and the long axis B of the secondary particles measured from an SEM image is 0.88≤A/B≤1.0. Compositional formula (1): Li.sub.1+aNi.sub.bCo.sub.cM.sub.dX.sub.eO.sub.2+α

To provide a carbon black for batteries capable of readily obtaining a positive electrode for batteries having excellent adhesiveness, and excellent output characteristics and the cycle characteristics. A carbon black for batteries, the carbon black having a BET specific surface area measured according to JIS K6217-2 C method of 100 m.sup.2/g or larger, and a surface fluorine concentration X (unit: atom %) and a surface oxygen concentration Y (unit: atom %) measured by X-ray Photoelectron Spectroscopy (XPS) satisfying the following conditions (A) and (B),
0.3≤X≤4.0 and  (A)
0.1≤Y≤3.0.  (B)

Silica-including microcapsule resin particles including an outer shell constituted of a crosslinked polymer and a cavity partitioned with the outer shell, in which the silica-including microcapsule resin particles contain inside the cavity a porous structure in which silica particles are mutually connected, and have a volume average particle diameter of 0.5 to 100 μm.

A magnesium oxide powder, including a specific magnesium oxide particle, can suppress an increase in viscosity when a resin is filled therewith and can realize high thermal conduction of a resin composition including the resin, and a filler composition, a resin composition, and a heat dissipation part including the magnesium oxide powder. The magnesium oxide powder includes a magnesium oxide particle, wherein an oil absorption of the magnesium oxide particle in the case of linseed oil measured according to JIS K 5101-13-1 is 2.5 mL/10 g or less.

The present disclosure provides a solid carbon black material including an oxidized carbon black having a pH of greater than 7, compositions including such solid carbon black material and a polymer component as well as articles made therefrom. The disclosure also concerns a method for manufacturing said solid carbon black material. The solid carbon black material is particularly useful for obtaining rubber compounds with low hysteresis, e.g. for the production of energy-saving tires, with enhanced curing rates compared to the use of conventional oxidized carbon blacks.

The present invention related to a hollow silica particle including: a shell layer containing silica; and a space formed inside the shell layer, in which the hollow silica particle has a particle density as measured by a dry pycnometer density measurement using helium gas of 2.00 g/cm.sup.3 or more and a particle density as measured by a dry pycnometer density measurement using oxygen gas of lower than 2.00 g/cm.sup.3.