Abstract: A novel monofunctional monomer having a cage oligosiloxane structure is represented by formula (1) wherein X is a polymerizable oxygen-containing C1-C40 group, R1 is a C1-C20 saturated hydrocarbon group, C6-C20 aromatic hydrocarbon group, C1-C20 organoxy group or halogen atom, and R is a non-polymerizable monovalent C1-C40 hydrocarbon group which is optionally halogenated. The monomer has improved compatibility with various solvents and polymerizable monomers. A method for preparing the same is also provided.

Abstract: Provided is an acrylic adhesive composition, including: (A) 100 parts by mass of an acrylic polymer containing a carboxyl group, with a glass transition temperature of 5 to 30° C., (B) 1 to 20 parts by mass of a resol-type phenol resin, (C) 1 to 20 parts by mass of an epoxy resin, and (D) 10 to 100 parts by mass of an inorganic filler, the composition optionally including 0 to 0.5 parts by mass of a curing accelerator per 100 parts by mass of the component (A). Also provided are an acrylic adhesive sheet that contains an adhesive layer including this composition and a method of bonding two substrates using this acrylic adhesive sheet. The acrylic adhesive sheet exhibits excellent adhesiveness, heat resistance, workability, handling properties and storage stability, and the acrylic adhesive composition is useful in the production of such an adhesive sheet.

Abstract: A method for preparing cold water-soluble polymer particles is described. The method includes subjecting a liquid containing a wetting agent or a powder of the wetting agent to dropping or spraying over or mixing with a starting water-soluble polymer particles while fluidizing the starting polymer particles without subsequent forced drying and grinding of the resulting particles. According to the invention, a powder or particulate product of a cold water-soluble polymer having excellent water wettability and capable of being quickly dissolved in water without formation of undissolved powder can be reasonably prepared and obtained from powdery or particulate water-soluble polymers without resorting to forced drying operations.

Abstract: Provided is an acrylic flame retardant adhesive composition, including: (A) 100 parts by mass of an acrylic polymer containing a carboxyl group, with a glass transition temperature of 5 to 30° C., (B) 1 to 20 parts by mass of a resol-type phenol resin, (C) 1 to 20 parts by mass of an epoxy resin, (D) 0.1 to 5 parts by mass of a curing accelerator, (E) a bromine-based flame retardant, in sufficient quantity to produce a bromine content within the entire composition, excluding the component (F), of 15 to 40% by mass, and (F) 10 to 100 parts by mass of an inorganic filler. Also provided are an acrylic adhesive sheet that contains an adhesive layer including this composition and a method of bonding two substrates using this acrylic adhesive sheet. The acrylic adhesive sheet exhibits excellent adhesiveness, heat resistance, workability, handling properties and flame retardancy, and the acrylic adhesive composition is useful in the production of such an adhesive sheet.

Abstract: A curable silicone resin composition is provided which is useful as a material for optical devices or parts, insulation material for electronic devices or parts, or coating material, and which produces a cured product having high hardness and strength and further having good optical transmission in the short wavelength region. The composition includes (A) an aromatic hydrocarbon compound having at least two hydrogen atoms bonded to silicon atoms with the silicon atoms being bonded to the hydrocarbon skeleton of the aromatic hydrocarbon compound, (B) a cyclic siloxane compound having at least two silicon atom-bonded alkenyl groups, and (C) a hydrosilylation reaction catalyst, or (D) an aromatic hydrocarbon compound having at least two alkenyl groups bonded to silicon atoms with the silicon atoms being bonded to the hydrocarbon skeleton of the aromatic hydrocarbon compound, (E) a cyclic siloxane compound having at least two silicon atom-bonded hydrogen atoms, and (C) a hydrosilylation reaction catalyst.

Abstract: Fine particles of complex oxide represented by formula: ABO3 wherein A is at least two elements selected from among alkaline earth metal elements and rare earth elements and B is at least one metal selected from among Ti, Mn, Nb and Zr, have a BET specific surface area of 20–70 m2/g and a DSC endothermic quantity of up to 20 mcal/g. The shrinkage behavior problem of internal electrode layers during firing is solved when the complex oxide fine particles or a mixture thereof with nickel particles is used as an electrode material for the internal electrode layers.

Abstract: By reacting two types of organosiloxane compounds in the presence of an alkaline compound and under conditions that do not substantially promote equilibration reaction, a linear organosiloxane polymer having a single peak molecular weight distribution is simply and economically produced with minimized formation of cyclics.

Abstract: A heat dissipating structure for a heat generating electronic component is characterized by comprising a heat dissipating sheet including a metal sheet and a heat conductive member having adhesion stacked thereon between the heat generating electronic component and a heat dissipating member, wherein the metal sheet is connected to the heat generating electronic component, and the heat conductive member having adhesion is connected to the heat dissipating member.

Abstract: There is disclosed a fluorine-containing polymerizable cyclic olefin compound that has one or more partial structures represented by the following general formula (1) or (2).

Abstract: A metallic silicon powder is prepared by effecting chemical reduction on silica stone, metallurgical refinement, and metallurgical and/or chemical purification to reduce the content of impurities. The powder is best suited as a negative electrode material for non-aqueous electrolyte secondary cells, affording better cycle performance.

Abstract: Provided is an agent serving as a binder and a disintegrant for dry direct compression having a high binding property and fluidity. More specifically, provided are low-substituted hydroxypropyl cellulose having coiled fibers; an agent serving both as a binder and a disintegrant for dry direct compression and a solid preparation, each comprising the low-substituted hydroxypropyl cellulose; and a process for producing the low-substituted hydroxypropyl cellulose having coiled fibers.

Abstract: When silicone rubber-impregnated and/or coated fabric pieces are mated, with their treated surfaces inside, and joined along a periphery to form a bag, a silicone rubber composition having a tris(trialkoxysilylalkyl) isocyanurate blended as an adhesion promoter is used as a sealer where the peripheral portions of the fabric pieces are joined together whereby an improved bond is established therebetween.

Abstract: A non-aqueous electrolytic solution is provided comprising a non-aqueous solvent, an electrolyte salt, and a siloxane modified with ether bond-bearing organic group. A non-aqueous electrolyte secondary battery using the same has improved characteristics both at low temperatures and at high outputs.

Abstract: A flexible metal foil/polyimide laminate is prepared by applying a polyamic acid varnish onto a very thin copper foil on a carrier, semi-drying the varnish, laminating a polyimide film to the varnish-coated copper foil using a hot roll press, and heat treating the laminate for solvent removal and imidization in an atmosphere having a controlled oxygen concentration. A polyimide adhesive layer resulting from the imidization of polyamic acid has a thickness of up to 6 ?m, the sum of the thicknesses of the polyimide film and the polyimide adhesive layer is up to 25 ?m. The polyimide adhesive layer has a Tg>400° C.

Abstract: A suspension for magnetic head, for supporting a magnetic head slider on which a magnetic head for recording/reproduction of information on a magnetic recording medium is mounted, wherein one end of the suspension is fixed to a stator portion fixed to the tip end of a load beam of the suspension, a gimbal portion and a rotor portion oscillatably supported by metallic micro-beams formed by bending are provided on the side of the other end of the suspension, and the magnetic head slider is attached to the gimbal portion, whereby the rotor portion and the magnetic head slider attached to the gimbal portion as one body with the rotor portion can be oscillated in parallel to the surface of a magnetic recording disk, independently of the driving of the slider by a coarse actuator.

Abstract: A ternary copolymer comprising units of ?-trifluoromethylacrylic carboxylate having acid labile groups substituted thereon, units of ?-trifluoromethylacrylic carboxylate having adhesive groups substituted thereon, and units of styrene having hexafluoroalcohol pendants is highly transparent to VUV radiation and resistant to plasma etching. A resist composition using the polymer as a base resin is sensitive to high-energy radiation below 200 nm, has excellent sensitivity, and is suited for lithographic microprocessing.

Abstract: A contaminated Group III metal hydrocarbon is purified by providing an adduct of Group III metal hydrocarbon with a Lewis base in a solvent having a boiling point which is up to 200° C., but at least 30° C. higher than the boiling point of the Group III metal hydrocarbon, separating the solvent from the adduct, and heating the adduct for thermal dissociation, thereby releasing the Group III metal hydrocarbon in high purity form.

Abstract: Provided is a two-part curable silicone composition including: (A) 100 parts by mass of an organopolysiloxane containing at least two alkenyl groups bonded to silicon atoms, (B) an organohydrogenpolysiloxane containing at least two SiH groups, in sufficient quantity to provide from 0.5 to 5.0 mols of SiH groups within the component (B) for every 1 mol of alkenyl groups within the entire composition, (C) an effective quantity of a hydrosilylation reaction catalyst, and (D) from 0.0001 to 1 part by mass of a nitrogen-containing compound (a triazole-based compound and/or an imidazole-based compound), which is prepared in two separate parts, in which the components (A) through (C) do not exist within one part, and the component (D) exists in a different part from that of the component (C). Also provided are a method of curing the composition and a cured product obtained by the method.

Abstract: A process for producing a vinyl chloride-based polymer by suspension polymerization is provided. The polymerization is initiated in the presence of (A) a particular hydroxypropylmethylcellulose, (B) a particular partially saponified PVA with a saponification degree of 75 to 85 mol % and an average polymerization degree of 1000 to 3000, and (C) a particular partially saponified PVA with a saponification degree of 20 to 57 mol % and an average polymerization degree of 150 to 600 in a specified ration, and said (C) is also additionally added to the polymerization system when a conversion rate is 15–50%. Polymers with a high porosity, excellent plasticizer absorption, extremely low levels of fish eyes, and a high bulk specific gravity are produced at a high level of productivity.

Abstract: The present invention generally relates to a polyhydric alcohol-modified silicone having the formula (I): R1aR2bR3cSiO(4-a-b-c)/2 wherein the variables are defined herein.