Abstract: A plasticizer composition to be used in a transparent resin for optics, wherein the plasticizer composition includes: a composite aggregated particulate material; and a liquid plasticizer having dispersed therein the composite aggregated particulate material. The composite aggregated particulate material includes an inorganic aggregate material being a granular material formed of aggregates of an inorganic particulate material formed of silica having a specific surface area particle diameter of not less than 0.8 nm and not greater than 80 nm, and an organic coating material formed of an organic matter coating a surface of the inorganic aggregate material. A mass of the organic coating material is not less than 0.8% and not greater than 80% with respect to a sum of a mass of the inorganic aggregate material and a mass of the organic coating material. Both mechanical properties and optical properties are realized by mixing the plasticizer composition.

Abstract: An interlayer film for laminated glass of the present invention is an interlayer film for laminated glass, the interlayer film having a structure of one or two or more layers, and comprising a first layer comprising a thermoplastic resin and a composite silica particle, in which the composite silica particle comprises a silica particle and an organic covering material with which a surface of the silica particle is covered, and a remaining fraction at dissolution in THF after still standing at 230° C. for 6 hours of the first layer is 15% by mass or less.

Abstract: Provided is a particle material that achieves excellent mechanical properties and optical properties when dispersed in a transparent resin material in order to solve the problem. In a case where primary particles having particle sizes in a certain range are formed into an aggregate, mechanical properties are enhanced while optical properties are maintained. The primary particles each have compositions different between the inside thereof and the surface thereof. Therefore, the optical properties to be obtained are easily controlled unlike an inorganic substance in which both of the compositions are mixed at an atomic level. The particle material of the present invention is an aggregate including primary particles in which a specific surface area. diameter is not less than 0.8 nm and not greater than 80 nm, the primary particles formed of an inorganic substance in which a composition of a surface and a composition of an inside are different.

Abstract: A plasticizer composition to be used in a transparent resin for optics, wherein the plasticizer composition includes: a composite aggregated particulate material; and a liquid plasticizer having dispersed therein the composite aggregated particulate material. The composite aggregated particulate material includes an inorganic aggregate material being a granular material formed of aggregates of an inorganic particulate material formed of silica having a specific surface area particle diameter of not less than 0.8 nm and not greater than 80 nm, and an organic coating material formed of an organic matter coating a surface of the inorganic aggregate material. A mass of the organic coating material is not less than 0.8% and not greater than 80% with respect to a sum of a mass of the inorganic aggregate material and a mass of the organic coating material. Both mechanical properties and optical properties are realized by mixing the plasticizer composition.