Abstract: The present invention relates to surface-coated inorganic particles in which a portion or all of the surface of inorganic particles (A) is coated with a surface treatment agent (B), wherein the inorganic particles (A) comprise silica particles or silicate mineral particles, the surface treatment agent (B) comprises at least one selected from the group consisting of a modified silicone (b1) liquid at 25° C., and a water-soluble cationic polymer (b2), and the modified silicone (b1) comprises at least one selected from the group consisting of a polyether-modified silicone, a polyglycerin-modified silicone, a branched polyglycerol-modified silicone and an alkyl glyceryl ether-modified silicone.

Abstract: The present invention relates to a surface-coated particle in which a portion or all of the surface of a particle (A) is coated with a surface treatment agent (B), wherein a dynamic friction coefficient of the surface-coated particle is 0.50 or less, when a 5% by mass ethanol dispersion of the surface-coated particle is applied onto a polyurethane substrate in an amount of 2 mg/cm2, and dried for 24 hours under atmospheric pressure at 23° C., followed by measurement under conditions of a load of 3.53 N, a moving speed of 10 mm/sec, a moving distance of 50 mm, 30 reciprocations, and a temperature of 25±2° C., and the standard deviation of the dynamic friction coefficient is 0.020 or less.

Abstract: Disclosed are: a particle-containing composition that contains inorganic particles (A) and particles (B) other than the particles (A), wherein the inorganic particles (A) are at least one selected from the group consisting of easily disintegrable inorganic particles (A1) having an average particle diameter DA1 of 1 ?m or more and 50 ?m or less, and having a surface roughness Ra of 10 nm or more and 50 nm or less, and inorganic particles (A2) having an average particle diameter DA2 of less than 1 ?m, and having an average primary particle diameter dA2 of 3 nm or more and 50 nm or less, and the particles (B) are particles having an average particle diameter DB of 1 ?m or more and 50 ?m or less, and coated on the surfaces thereof with a polymer (C) having a hydrogen bond-accepting bond or a hydrogen bond-accepting functional group; and a method for producing the particle-containing composition, and a method for suppressing adhesion of air harmful substances using the particle-containing composition.