摘要:
It is intended to provide a cosmetic which contains spherical nonporous particles having a pore volume substantially equal to zero and has an opaquing effect. This cosmetic comprises from 0.1 to 70% by weight of the spherical nonporous particles, liquid component(s) and the balance of solid component(s) other than the spherical nonporous particles. The above-described spherical nonporous particles are made up of masses (average diameter: 1 to 100 μm) of fine inorganic oxide particles, which are composed of fine inorganic oxide particles (average particle diameter: 2 to 250 nm), and a silica-based layer coating the same.
摘要:
The present invention provides a dental composition exhibiting both an excellent light diffusion property and excellent transparency, and having high mechanical strength and surface smoothness and gloss after polishing as a cured product and good handling properties as a paste. The present invention is a dental composition including: a polymerizable monomer (A); and an amorphous powder (B). The amorphous powder (B) has an average particle size of 1 to 20 µm, and includes silica-based fine particles and coatings of an oxide that cover the surfaces of the silica-based fine particles. The oxide contains a zirconium atom, a silicon atom, and an oxygen atom. The difference in refractive index between the cured product of the polymerizable monomer (A) and the amorphous powder (B) is 0.005 to 0.03.
摘要:
The coating liquid for forming a silica-containing film with a low dielectric constant according to the present invention comprises: (i) fine particles of silica having a phenyl group thereon, and (ii') an oxidatively decomposable resin, the weight ratio of the fine particles of silica having a phenyl group to the oxidatively decomposable resin being in the range of 0.5 to 5. By virtue of the present invention, there can be formed a stable silica-containing film, which has a dielectric constant as low as 3 or less, which is excellent in microphotolithography workability, adherence to a substrate surface, chemical resistance such as alkali resistance and crack resistance, and which exhibits excellent planarizing performance.
摘要:
An exhaust gas treatment apparatus includes a device (A) which is provided in an exhaust system and which selectively reduces NO x in an exhaust gas and a device (B) which is disposed upstream of the device (A) and which decomposes urea and supplies ammonia as a NO x reducing gas, the device (B) including a urea decomposition catalyst. The catalyst is [1] a zeolite catalyst which is composed of granular molded bodies including zeolite particles or which includes a catalyst layer composed of zeolite particles disposed on a support, or [2] a honeycomb catalyst or a membranous catalyst in which metal oxide particulates adhere to a conductive honeycomb substrate or netlike support, and the metal oxide particulates are composed of at least one oxide of a metal selected from the group consisting of Na, Mg, Ca, Ba, La, Ce, Ti, Zr, V, Cr, Mo, W, Mn, Zn, Al, Si, P, Sb, Cu, Fe, Ru, Co, and Re.
摘要:
To provide, for example, a paint composition for forming a hard coat layer capable of shortening the heating time required to form a hard coat layer by curing a coating film without impairing the quality of the resulting hard coat layer. A paint composition for forming a hard coat layer including surface-coated inorganic oxide fine particles that are inorganic oxide fine particles having been subjected to surface coating treatment with a quaternary alkoxysilane; hydrolysates of an organosilicon compound having an epoxy group and/or condensates of the hydrolysates; 1,2,3,4-butanetetracarboxylic acid; and a curing agent, the hydrolysates and/or condensates of the hydrolysates having a number-average molecular weight of 80 to 500, the composition having a content amount of 1,2,3,4-butanetetracarboxylic acid of 8 to 25 parts by mass with respect to 100 parts by mass of the surface-coated inorganic oxide fine particles.
摘要:
Particles having excellent touch properties are achieved with a water-soluble material having excellent biodegradability. Particles according to the present invention contain a starch having an amylopectin content of 90% by weight or more. The average particle diameter d 1 of the particles is 0.5 to 20 µm, and the maximum particle diameter d 2 is less than 30 µm while being within 3.0 times the average particle diameter.