摘要:
In a dynamoelectric machine having a stator assembly of coil windings and a core, a heat-dissipating, electro-insulative housing encapsulates the coil windings and the core. The housing is made of a cured molded article or material formed of a resin-filler composition which comprises a liquid unsaturated polyester resin, a finely divided calcium carbonate powder, an inorganic mineral particulate having a particle size larger than that of the calcium carbonate powder, and a chopped glass fiber, wherein the ratio by weight of the calcium carbonate to the mineral particulate is 0.3 to 4, the ratio of the weight of glass fiber to the total weight of the composition is 0.05 to 0.25, the ratio of the weight of the polyester resin to the total weight of the composition is 0.1 to 0.4 and the weight ratio of the calcium carbonate powder, the mineral particulate and the glass fiber to the total weight of the composition is 0.6 to 0.9.The disclosure is also concerned with a dynamoelectric machine having a housing made of a cured article of a composition containing a certain amount of clay powder as a separation inhibitor.
摘要:
An unsaturated polyester resin composition for use in pressure molding, which comprises an unsaturated polyester resin and fillers consisting essentially of (a) calcium carbonate powder which passes a 325 mesh sieve, (b) an inorganic mineral particulate which passes a 12 mesh sieve and is retained on a 200 mesh sieve and (c) glass fibers having a length larger than 0.2 mm, wherein the ratio by weight of (a) to (b) is within a range of from 0.3 to 10, the ratio of (a)+(b) to the unsaturated polyester resin is within a range of from 1.5 to 7, and the ratio of (c) to the total weight of the resin, calcium carbonate, silica sand and glass fiber is within a range of from 0.01 to 0.25.
摘要:
In a dynamoelectric machine having a stator assembly of coil windings and a core, a heat-dissipating, uninflammable, electro-insulative housing encapsulates the coil windings and the core. The housing is made of a cured molded article or material formed of a resin-filler composition which comprises a liquid unsaturated polyester resin, a finely divided calcium carbonate powder, an inorganic mineral particulate having a particle size larger than that of the calcium carbonate powder, a chopped glass fiber and an aluminum hydroxide powder, wherein the ratio by weight of the calcium carbonate to the mineral particulate is 0.3 to 4, the ratio of the weight of glass fiber to the total weight of the composition is 0.05 to 0.25, the ratio of the weight of the polyester resin to the total weight of the composition is 0.1 to 0.4, the weight ratio of the calcium carbonate powder, the mineral particulate and the glass fiber to the total weight of the composition is 0.15 to 0.80, and the weight ratio of the aluminum hydroxide powder to the total weight of the composition is 0.1 to 0.6.
摘要:
A polymerizable, curable resin composition suitable for molding materials, prepreg, powdery paint materials or the like, which comprises a polyepoxide, a uretdione and a tetraphenyl borate-amine complex. This composition has long pot life and good curability by virtue of latent catalytic characteristics of the complex.
摘要:
An epoxy resin composition having a remarkably improved storage stability and an excellent hardening characteristic when heated, which comprises an epoxy resin and an aromatic amino carboxylic acid or a derivative thereof as a hardener for the epoxy resin. This composition can be molded by injection molding, heretofore being deemed inapplicable to epoxy resin compositions, whereby the molded articled of epoxy resin can be produced with a high molding efficiency.
摘要:
A novel thermosetting resin composition consisting essentially of (a) an isocyanate group-terminated condensate obtained by reacting a polycarboxylic acid compound having at least one acid anhydride ring with a stoichiometrical excess of a polyfunctional isocyanate compound or said condensate containing the unreacted isocyanate compound, (b) a polyfunctional epoxy compound and (c) a catalyst which forms mainly isocyanurate rings and oxazolidone rings. A cured product having excellent thermal resistance and excellent high temperature strength can be obtained by heating said composition.
摘要:
A thick and thin film hybrid multilayer wiring substrate includes an adjustment layer provided between a thick film circuit and a thin film circuit in order to adjust positions of the thick film circuit and the thin film circuit with high integration and large area of the thick and thin film hybrid substrate. The adjustment layer is formed using a direct printing process in accordance with dispersion of the shape of the thick film circuit substrate to absorb the dispersion of the substrate. Further, in order to absorb dispersion of contraction of the thick film substrate due to sintering, a position of a mark provided on the substrate is detected by an electron beam and thereafter a connection pattern is formed to be connected to a regular pattern.
摘要:
A cooling device for cooling semiconductor elements by removing heat generated from the semiconductor elements such as, for example, semiconductor integrated chips in a large-sized electronic computer. The cooling device is fashioned of a composite AlN-BN sintered material having a Vickers hardness not higher than one-fifth of that of an AlN material, and an anisotropic property of thermal conductivity in a two dimensional direction is higher than that of AlN which is isotropic in thermal conductivity. The cooling device may be mass-produced while nevertheless having a high transfer performance matching the quantity of heat generated for each semiconductor element even if the composite sintered material is uniform in shape and size. The composite sintered material is formed by a mixture of a hexagonal BN powder having an average particle diameter of not less than 1 .mu.m and an AlN powder having an average particle diameter of about 2 .mu.m, with a sintering aid being added and the powdery mixture being subjected to a hot press sintering whereby the sintered material is low in thermal conductivity in a direction parallel to an axis of a shaft of the hot press.
摘要:
An optical switch having a small number of optical connections includes a substrate in which are provided a first light path for conducting optical signals and a second light path consisting of a photosensitive element and light emitting element in pairs. An optical fiber cable is interrupted by the substrate, and optical signals in the fiber cable are transmitted through the first light path or intervened by an electrical system through the second light path in response to the switching movement of the substrate.
摘要:
Disclosed are photosensitive resin composition useful for formation of fine patterns on semiconductor devices, magnetic bubble devices, etc. which is highly sensitive and is excellent in developability and which has no problem such as precipitation of azide compounds and remaining azide particles after development and a method for forming fine patterns with said composition.Said photosensitive resin composition comprises (a) at least one polymer compound selected from the group consisting of a novolak resin and a polyhydroxystyrene resin and (b) an azide compound represented by the general formula (1): ##STR1## [wherein X is --N.sub.3 or --SO.sub.2 N.sub.3, Y is ##STR2## R.sup.1 is a lower alkylene such as --CH.sub.2 CH.sub.2 --, --CH.sub.2 CH.sub.2 CH.sub.2 --, or --CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 CH.sub.2 --, a hydroxyalkylene or an aminoalkylene such as ##STR3## (wherein R.sup.4 and R.sup.5 are lower alkyl or hydrogen, R.sup.6 -R.sup.8 are lower alkyl groups, R.sup.3 is hydrogen, a lower alkyl group or --CH.sub.2 CH.sub.2 O).sub.n R.sup.9 wherein n is an integer of 3 or less and R.sup.9 is hydrogen or a lower alkyl group)].