Abstract: The aminosilane-modified colloidal silica dispersion contains colloidal silica particles having surfaces to which there are bound a first silyl group represented by the following formula (1): R1aSi(OR2)3-aO— and a second silyl group represented by the following formula (2): R3bSi(OR4)3-bO— and, as a dispersion medium, a mixed solvent formed of a polar solvent S1 having a dielectric constant at 20° C. of 15 or higher and lower than 60 and a non-polar solvent S2 having a dielectric constant at 20° C. of 1 or higher and lower than 15, at a mass ratio (S1/S2) of 0.3 to 6.

Abstract: The aminosilane-modified colloidal silica dispersion contains colloidal silica particles having surfaces to which there are bound a first silyl group represented by the following formula (1): R1aSi(OR2)3-aO— and a second silyl group represented by the following formula (2): R3bSi(OR4)3-bO— and, as a dispersion medium, a mixed solvent formed of a polar solvent S1 having a dielectric constant at 20° C. of 15 or higher and lower than 60 and a non-polar solvent S2 having a dielectric constant at 20° C. of 1 or higher and lower than 15, at a mass ratio (S1/S2) of 0.3 to 6.

Abstract: Providing a modified-graphene-like carbon material into which hydroxyl groups are introduced. By reacting a graphene-like carbon material with hydrogen peroxide, a hydroxyl group is introduced into the graphene-like carbon material.

Abstract: Provided are a functional-group-modified carbon material modified with an isocyanate group or amino group, and a method for producing the material. The material is an isocyanate-group-modified carbon material in which an isocyanate group of a diisocyanate compound is bonded to a graphene-like carbon material, or an amino-group-modified carbon material in which a fragment obtained by radical-decomposing an amino-group-containing azo-type radical initiator is added to the graphene-like carbon material by radical-trapping. The method is a method for producing a functional-group-modified carbon material, including heating and stirring, in a solvent, a graphene-like carbon material, and a diisocyanate compound or an amino-group-containing azo-type radical initiator.

Abstract: Silica particles having 4-30% of an organopolysiloxane grafted to surfaces thereof are provided. A silicone composition loaded with such silica particles has high transparency, minimized permeability to corrosive gases, and improved encapsulation ability.

Abstract: Providing a modified-graphene-like carbon material into which hydroxyl groups are introduced. By reacting a graphene-like carbon material with hydrogen peroxide, a hydroxyl group is introduced into the graphene-like carbon material.

Abstract: Provided are a functional-group-modified carbon material modified with an isocyanate group or amino group, and a method for producing the material. The material is an isocyanate-group-modified carbon material in which an isocyanate group of a diisocyanate compound is bonded to a graphene-like carbon material, or an amino-group-modified carbon material in which a fragment obtained by radical-decomposing an amino-group-containing azo-type radical initiator is added to the graphene-like carbon material by radical-trapping. The method is a method for producing a functional-group-modified carbon material, including heating and stirring, in a solvent, a graphene-like carbon material, and a diisocyanate compound or an amino-group-containing azo-type radical initiator.

Abstract: Disclosed are: a novel palladium catalyst which does not undergo leakage, can be recycled, does not require the use of any phosphorus-containing ligand, and has a high catalytic activity; and a process for producing a novel bisaryl compound using the palladium catalyst. In the production of a bisaryl compound by reacting an aromatic halide with an aromatic boronic acid in the presence of a palladium catalyst and a base, the palladium catalyst comprises a dendrimer containing a silica particle as a core and a palladium compound dissolved in an ionic liquid and supported on the dendrimer.

Abstract: Disclosed are: a novel palladium catalyst which does not undergo leakage, can be recycled, does not require the use of any phosphorus-containing ligand, and has a high catalytic activity; and a process for producing a novel bisaryl compound using the palladium catalyst. In the production of a bisaryl compound by reacting an aromatic halide with an aromatic boronic acid in the presence of a palladium catalyst and a base, the palladium catalyst comprises a dendrimer containing a silica particle as a core and a palladium compound dissolved in an ionic liquid and supported on the dendrimer.

Abstract: Silica particles having 4-30% of an organopolysiloxane grafted to surfaces thereof are provided. A silicone composition loaded with such silica particles has high transparency, minimized permeability to corrosive gases, and improved encapsulation ability.

Abstract: A method for making a PTC element grafts a crystalline polymer to conductive particles to form a PTC composition. The step of grafting including solution polymerization. The PTC composition is formed into a PTC element. The PTC element is cross-linked after forming. The PTC element according to this invention exhibits superior PTC behavior when the temperature of the PTC element reaches the crystal melting point of the crystalline polymer.