Abstract: A heat conducting composition containing a curable silicone resin (A) and 70 to 98% of a thermally conductive powder (B) containing 30 to 75% of aluminum nitride particles (B-1) having a 50% particle size of 50 to 150 ?m, 10 to 30% by mass of aluminum nitride particles (B-2) having a 50% particle size of 15 to less than 50 ?m, 5 to 15% of a metal oxide (B-3) other than zinc oxide having a 50% particle size of 1 to less than 20 ?m, and 10 to 40% of zinc oxide (B-4) having a 50% particle size of 0.1 to less than 1 ?m and a BET specific surface area of less than 9.0 m2/g. The metal oxide (B-3) and the zinc oxide (B-4) are both surface treated with a surface treatment agent selected from a silane coupling agent having an C10-C22 alkyl group and ?-butyl-?-(2-trimethoxysilylethyl)polydimethylsiloxane.

Abstract: Provided is a method for producing a surface-treated thermally conductive filler, the method including treating the surface of the thermally conductive filler with an alkoxysilane having a specific structure by the chemical vapor deposition method.

Abstract: A thermally conductive resin composition includes an epoxy resin and a thermally conductive powder. The thermally conductive powder includes aluminum nitride having a silicon-containing oxide coating on a surface thereof and another thermally conductive powder. The content of the epoxy resin is 1% by mass or more and 20% by mass or less based on the total amount of the thermally conductive resin composition. The content of the thermally conductive powder is 80% by mass or more and 99% by mass or less based on the total amount of the thermally conductive resin composition. The content of the aluminum nitride having a silicon-containing oxide coating on a surface thereof is 10% by mass or more and 70% by mass or less based on the total amount of the thermally conductive resin composition. The content of the other thermally conductive powder is 10% by mass or more and 89% by mass or less based on the total amount of the thermally conductive resin composition.

Abstract: A thermally conductive urethane resin composition comprising a castor oil-based polyol, a polyisocyanate compound, and a filler, wherein an equivalent ratio [NCO/OH] of isocyanato groups of the polyisocyanate compound to hydroxyl groups of the castor oil-based polyol is from 0.8 to 1.6, the filler comprises a filler (A) having an average particle diameter of 0.03 to 10 ?m, and the filler (A) has been surface-treated with a specific surface treatment agent.

Abstract: A thermally conductive composition comprising: a filler; and a polymer component, wherein the filler comprises at least one surface-treated filler selected from the group consisting of the following filler (A) and filler (B): Filler (A): A filler surface-treated by a chemical vapor deposition method using a siloxane having one SiH group Filler (B): A filler surface-treated by a chemical vapor deposition method using a siloxane having two or more SiH groups, wherein at least one group selected from the group consisting of an unsubstituted alkyl group having 6 to 20 carbon atoms, an alkyl group having 2 to 20 carbon atoms having a substituent, and a group having a specific structure is further bonded to a silicon atom on a surface of the filler and introduced.

Abstract: A heat conducting composition including: a polymer component (A); a surface-treated filler (B) obtained by surface-treating a filler with ?-butyl-?-(2-trimethoxysilylethyl)polydimethylsiloxane having a weight average molecular weight of 500 to 5,000, with the ?-butyl-?-(2-trimethoxysilylethyl)polydimethylsiloxane having an adhesion percentage to the filler of from 20.0 to 50.0% by mass; and a silicon-containing oxide-coated nitride (C) having a nitride and a silicon-containing oxide coating that coats the nitride.

Abstract: A surface-treated filler obtained by surface-treating a surface of a filler with ?-butyl-?-(2-trimethoxysilylethyl)polydimethylsiloxane having a weight average molecular weight of 500 to 5,000, wherein an adhesion percentage of the ?-butyl-?-(2-trimethoxysilylethyl)polydimethylsiloxane to the filler is from 20.0 to 50.0% by mass.

Abstract: A thermally conductive composition contains a resin composition and a thermally conductive filler, wherein the resin composition contains a vinyl group-containing silicone resin having a viscosity ranging from 40,000 mPa·s to 200,000,000 mPa·s at 25° C. and a polysiloxane compound having at least one hydroxy group at an end, having no vinyl group, and having a weight-average molecular weight (Mw) of 10,000 or more and 20,000 or less, the mass ratio of the vinyl group-containing silicone resin to the polysiloxane compound [the vinyl group-containing silicone resin/the polysiloxane compound] is 50/50 or more and less than 90/10, the content of the thermally conductive filler ranges from 300 parts by mass to 5,000 parts by mass with respect to 100 parts by mass of the resin composition, and a cured product of the thermally conductive composition has a thermal conductivity of 1.0 W/mk or more.

Abstract: A thermally conductive composition contains a resin composition and a thermally conductive filler, wherein the resin composition contains a liquid silicone resin having a viscosity ranging from 20 mPa·s to 200,000,000 mPa·s at 25° C. as measured according to JIS Z8803:2011 and a polysiloxane compound having at least one hydroxy group not directly bound to a silicon atom at an end, and having no vinyl group; the mass ratio of the liquid silicone resin to the polysiloxane compound [the liquid silicone resin/the polysiloxane compound] is 50/50 or more and less than 90/10, the content of the thermally conductive filler ranges from 300 parts by mass to 5,000 parts by mass with respect to 100 parts by mass of the resin composition, and a cured product of the thermally conductive composition has a thermal conductivity of 1.0 W/mk or more as measured according to ISO22007-2.

Abstract: A thermally conductive composition containing a filler and a polymer component, wherein the filler includes a filler (A) surface-treated with a silylated castor oil derivative obtained by reacting isocyanate silane with a castor oil-based polyol.

Abstract: Provided is a thermally conductive composition containing a liquid resin, a thermally conductive powder, and a dispersant, in which the liquid resin has a viscosity of 10 mPa·s or more and 2,000 mPa·s or less at 25° C., the dispersant is an acrylic silicone, and at least one of the liquid resin and the thermally conductive powder contains an alkyl group having 4 or more carbon atoms.

Abstract: An inorganic particle dispersion resin composition, containing: a resin; and inorganic particles, in which the inorganic particles include silica-covered aluminum nitride particles and alumina particles, and the silica-covered aluminum nitride particles include aluminum nitride particles and a silica film covering surfaces of the aluminum nitride particles. A total content of the inorganic particles is preferably in a range of greater than or equal to 60.0 volume % and less than or equal to 85.0 volume %.