Abstract: Disclosed is a vinyl polymer powder which is superior to dispersibility to curable resin compositions, which immediately gives a gel state for curable resin compositions by short-time heating with predetermined temperature, which is with high ion concentration, and which is useful as a pre-gel agent suitable for fields of electronic materials, to provide a curable resin composition comprising the vinyl polymer powder, and to provide a cured substance of the curable resin composition. The vinyl polymer powder of the present invention has an acetone-soluble component of 30% by mass or more, mass average molecular weight of the acetone-soluble component of 100,000 or more, a content of an alkali metal ion of 10 ppm or less, and a volume average primary particle size (Dv) of 200 nm or more.

Abstract: Disclosed is a method for producing powder of a vinyl polymer containing a silicone polymer, which comprises the step of spray-drying a latex of the vinyl polymer containing a silicone polymer obtained by polymerization of a vinyl monomer in the presence of a latex of the silicone polymer, wherein 3.0 mmol or less of a sulfate is contained in 100 g of the powder of a vinyl polymer containing a silicone polymer. According to the present invention, a powder which can provide a shaped article excellent in impact resistance and hydrolysis resistance in the case when the powder is blended in a resin such as polycarbonate resin can be obtained.

Abstract: Disclosed are a powdery processing aid for polyolefin resins, containing an alkyl methacrylate polymer which has alkyl methacrylate units having an alkyl group with 2 to 6 carbon atoms as a main component and has a mass average molecular weight of 150,000 to 20,000,000, having good handling properties as a powder, having good dispersibility in polyolefin resins, and being able to improve shaping processability of polyolefin resins; and a polyolefin resin composition having improved shaping processability, which contains a powdery processing aid for polyolefin resins and a polyolefin resin.

Abstract: There is provided a resin which, in spite of having excellent impact resistance because of containing a rubber ingredient, can be molded into a haze-free and beautiful state across the entire surface of molded products even if the molded products are large-sized injection molded products, and is suitable for molded products on which a vapor deposition layer is formed by the direct vapor deposition method, and is suitable for molded products which are joined by the hot plate welding method, particularly molded products such as housing members of automotive lamps, which require weatherability. Also provided is a graft copolymer (B) obtained by polymerizing a (meth)acrylate monomer (b1) a homopolymer of which has a glass transition temperature exceeding 0° C. in the presence of a composite rubber (A) containing a polyorganosiloxane (A1) and a poly(meth)acrylate (A2), and then polymerizing an aromatic vinyl monomer (b2) and a cyanided vinyl monomer (b3).

Abstract: Methods for producing an independent glass ceramic film including the steps of mixing a colloidal silica sol having a pH of about 4 or less, a zirconium-containing compound, a binder, and a crosslinking agent capable of crosslinking with the binder at about 50° C. or less, to produce a mixed liquid; coating the mixed liquid on a substrate; drying the coated mixed liquid to form a precursor film on the substrate; separating the precursor film from the substrate; and firing the separated precursor film. A precursor liquid that includes colloidal silica sol having a pH of about 4 or less, a zirconium-containing compound, a binder, and a crosslinking agent capable of crosslinking with the binder at about 50° C. or less is also disclosed.

Abstract: A two-pack type plastisol composition comprising two liquid compositions (LA) and (LB), characterized in that the composition obtained by mixing the compositions (LA) and (LB) has a gelation time (as measured at 30.degree. C.) of 1 hour or shorter. It is a novel material which gels at ordinary temperature in 1 hour, preferably in several minutes, to come to have practically sufficient performances. The composition (LA) preferably comprises fine acrylic polymer particles (A) and a dispersion medium (B) in which the particles (A) are substantially insoluble at ordinary temperature (provided that the particles (A) may be soluble in the medium (B) at elevated temperatures). The composition (LB) preferably comprises an organic solvent (C) in which the particles (A) have sufficiently high solubility at ordinary temperature.

Abstract: A method for producing a (meth)acrylic polymer particle comprises polymerizing a monomer (X) having a (meth)acryloyl group to produce a polymer particle, and polymerizing a monomer mixture (Y) in the presence of the polymer particle, in which the monomer (X) is 90 to 99.9% by mass and the monomer mixture (Y) is 0.01 to 10% by mass in terms of the ratio among monomer raw materials to be supplied for polymerization; and the monomer mixture (Y) comprises 1 to 80% by mol of a monomer (a) having a basic nitrogen atom or having a blocked isocyanate as a functional group, 5 to 80% by mol of a (meth)acrylate monomer (b) of at least one alcohol selected from the group consisting of an aliphatic alcohol having 2 or more carbon atoms, an aromatic alcohol, and a cyclic alkyl alcohol, and 0 to 94% by mol of a monomer (c) other than the monomer (a) and the monomer (b).

Abstract: A thermal insulating material which can be efficiently produced while the content of organic matters, such as organic fibers and/or an organic binder, is reduced to the same or lower degree as compared with the thermal insulating material used in a conventional pollution control device (e.g., catalytic converter), and which can be applied to a pollution control element (e.g., catalytic element) while avoiding, as much as possible, an unpleasant feeling to the operator. A thermal insulating material comprising a thermal insulating material body formed of a bulk material of inorganic fibers, and a coating provided on at least one surface of said thermal insulating material body.

Abstract: A process for the production of a self-supporting glass film is described. The method includes the steps of preparing a mixture containing a colloidal silica sol, at least one alkanolamine organic additive and an organic binder; coating the mixture onto a base material; drying the coated mixture to form a precursor film on the base material; releasing the precursor film from the base material; and firing the released precursor film to form a self-supporting glass film. Self-supporting glass films produced by the disclosed process are also described.

Abstract: A process is described for production of a self-supporting glass film that includes the steps of preparing a boron-containing aqueous solution containing boric acid and an alkanolamine; producing a mixture that includes the boron-containing aqueous solution, a colloidal silica sol and an organic binder; applying the mixture onto a base material to form a coating; drying the coating to form a precursor film on the base material; releasing the precursor film from the base material; and firing the released precursor film. A self-supporting glass film prepared using this process is also described.

Abstract: A glass ceramic self-supporting film that includes silica (SiO2) matrix glass and fine crystalline zirconia (ZrO2) particles dispersed in the matrix glass. A process for production of a glass ceramic self-supporting film wherein the process includes the steps of combining a colloidal silica sol having a pH of 4 or less, a zirconium-containing compound and an organic binder to produce a mixture, coating the mixture onto a base material, drying the mixture on the coated base material to form a precursor film on the base material, releasing the precursor film from the base material, and firing the released precursor film.

Abstract: In order to suppress the occurrence of damage on a press-fit joining wiring board, a peak value of stress generated on the board in the case of a press-fitting a press-fit terminal into a through-hole is reduced so that it can not exceed the design standard value of the board. In the press-fit terminal in which a body part, retaining part, introducing part and forward end part are integrally formed, a cross-sectional area of the introducing part is reduced to be smaller than that of the retaining part, so that an intensity of the elastic force of the introducing part is decreased to be lower than that of the elastic force of the retaining part. Alternatively, on the wiring board, elastic material is filled into resin for combining sheet-like base material of the board so as to relieve an intensity of stress generated on the board itself.

Abstract: A polymer particle is obtained by polymerizing a monomer in the presence of a phosphate salt represented by the following formula (1). The polymer particle contains 0.01 to 1.0 part by mass of the phosphate salt to 100 parts by mass of the polymer particle. A resin composition and a molded article using such a polymer particle are excellent in thermal stability and resistance to moist heat, and the color tone of the resin has little change before and after the blending of the polymer particle. In the formula (1), R1 represents an alkyl group having 10 to 18 carbon atoms, R2 represents an alkylene group having 2 to 3 carbon atoms, M represents an alkaline metal or an alkaline earth metal, m represents an integer of 1 to 20, and n represents 1 or 2.

Abstract: A viscosity modifier for plastisol compositions which contains at least one selected from the group consisting of: (A) a compound having at least one of a carboxy group or a salt thereof, an alkoxy group, and a glycidyl group; (B) amine compounds; and (C) metal chelate compounds. A plastisol composition containing the viscosity modifier and a polymer. A product having a coating layer obtained from the composition. A molded product obtained by using the composition. This viscosity modifier has an excellent effect of decreasing viscosity of a plastisol composition, thus enabling acquisition of a plastisol composition which allows an excellent cured product to be obtained at a low cost.

Abstract: A resin composition for molding materials according to the present invention comprising an acrylic polymer and a plasticizer, wherein the acrylic polymer consists of primary particles which have a core-shell structure comprising a core polymer and a shell polymer, and wherein the core polymer and shell polymer comprise methyl methacrylate monomer units and the core polymer has a lower content of methyl methacrylate monomer units than the shell polymer. The resin composition has high moldability during molding and gives a molded article having high hardness and high tear strength and reduced in plasticizer bleeding.

Abstract: There is provided an image forming apparatus comprising a developing device containing a toner having an average particle diameter of 2 to 5 ?m and a spherical degree of 1 to 1.2, and a transfer member which is pressed against the image carrier by a pressing force having a total load of 150 g to 1500 g and a surface load of 10 to 150 g/cm2 at the time of transfer.

Abstract: A novel technique that is able to efficiently remove, in addition to pentavalent arsenic, trivalent arsenic that has been considered to be difficult to remove. By using a manganese oxygen compound which is characterized by being a product of burning or heating which comprises an oxygen compound of bismuth and an oxygen compound of manganese and by containing manganese as a major component, an aqueous arsenic solution is treated to adsorptively remove the arsenic.

Abstract: There is provided a thermally conductive composition including: a thermally conductive filler, and a binder component. The thermally conductive filler includes: a particulate central portion comprising metal aluminum, and an electrically-insulated oxide layer having an average thickness of 500 nm or more formed on a surface of said central portion. The thermally conductive composition is capable of giving a thermally conductive sheet which has high thermal conductivity, which may not cause a problem such as a short circuit even if it is disposed in an integrated circuit (IC), or the like, and which has superior reliability.

Abstract: A two-pack type plastisol composition comprising two liquid compositions (LA) and (LB), characterized in that the composition obtained by mixing the compositions (LA) and (LB) has a gelation time (as measured at 30° C.) of 1 hour or shorter. It is a novel material which gels at ordinary temperature in 1 hour, preferably in several minutes, to come to have practically sufficient performances. The composition (LA) preferably comprises fine acrylic polymer particles (A) and a dispersion medium (B) in which the particles (A) are substantially insoluble at ordinary temperature (provided that the particles (A) may be soluble in the medium (B) at elevated temperatures). The composition (LB) preferably comprises an organic solvent (C) in which the particles (A) have sufficiently high solubility at ordinary temperature.

Abstract: This invention relates to a fine particle of polymer for a plastisol free from halogen atoms and having a specific surface area of 0.6 to 20.0 m2/g as determined by nitrogen-gas adsorption and a non-halogenated plastisol composition therefrom. This invention can provide a non-halogenated plastisol composition which does not generate toxic substances during incineration, is suitable as a coating material or sealant, and has a low viscosity, resulting in good workability and processability.