A black-color polymer composite film comprising a phthalocyanine compound dispersed in a polymer selected from the group consisting of polyimide, polyamide, polyoxadiazole, polybenzoxazole, polybenzobisoxazole, polythiazole, polybenzothiazole, polybenzobisthiazole, poly(p-phenylene vinylene), polybenzimidazole, polybenzobisimidazole, and combinations thereof, wherein the phthalocyanine compound occupies a weight fraction of 0.1% to 50% based on the total polymer composite weight. Preferably, the phthalocyanine compound is selected from copper phthalocyanine, zinc phthalocyanine, tin phthalocyanine, iron phthalocyanine, lead phthalocyanine, nickel phthalocyanine, vanadyl phthalocyanine, fluorochromium phthalocyanine, magnesium phthalocyanine, manganous phthalocyanine, dilithium phthalocyanine, aluminum phthalocyanine chloride, cadmium phthalocyanine, chlorogallium phthalocyanine, cobalt phthalocyanine, silver phthalocyanine, a metal-free phthalocyanine, or a combination thereof.

Disclosed are a novel polymer compound containing multiple hydroxyl groups, a method for producing the same, and a complex having a crosslinked structure of the polymer compound. The polymer compound includes a repeating unit represented by a following Chemical Formula 1: ##STR00001## where in the Chemical Formula 1, n denotes an integer of 10 to 10,000.

The present invention relates to a polymer which comprises at least one structural unit which contains at least one aldehyde group, and to a process for the preparation of a crosslinkable or crosslinked polymer including a polymer which contains aldehyde groups. The present invention thus also relates to a crosslinkable polymer and a crosslinked polymer which is prepared by the process according to the invention, and to the use of this crosslinked polymer in electronic devices, in particular in organic electroluminescent devices, so-called OLEDs (OLED=organic light emitting device).

Disclosed is a method for producing a prepreg, the prepreg having: a reinforcing fiber layer including reinforcing fibers and a resin composition containing component (A), component (B), and component (C), the reinforcing fibers being impregnated with the resin composition in between the fibers; and a surface fiber layer provided on the surface of the reinforcing fiber layer and including a fabric including polyamide fibers and a resin composition containing component (A), component (B), and component (C), the polyamide fibers being impregnated with the resin composition in between the fibers. The method for producing a prepreg includes a disposition step of disposing the fabric on the surface of a reinforcing fiber base material and an impregnation step of supplying a resin composition to the reinforcing fiber base material and impregnating the reinforcing fibers with the resin composition in between the fibers.

Cellulose fibers are impregnated with polyethyleneimine so that the impregnation forms a type of network, which can reduce the specific resistance of the cellulose material owing to the electrical conductivity of the network. The cellulose material can thereby be advantageously adapted to use as electrical insulation of transformers, the cellulose material in this case being soaked in transformer oil. An adaptation of the specific resistance of the cellulose material to the specific resistance of the oil lead to improved dielectric strength of the transformer insulation. A method for impregnation of the cellulose material is described.

The present invention provides a resin composition with which a laminate, a printed wiring board, and the like that not only have high thermal conductivity but have good moldability with the occurrence of cracks and voids suppressed can be implemented simply and with good reproducibility, and a prepreg, a laminate, a metal foil-clad laminate, and the like using the same. The resin composition of the present invention is a resin composition comprising at least a cyanate ester compound (A), an epoxy resin (B), a first inorganic filler (C), and a second filler (D), wherein an average particle diameter ratio of the first inorganic filler (C) to the second inorganic filler (D) is in the range of 1:0.02 to 1:0.2.

A method for effectively removing minute impurities of 1 μm or less in size that are present on a surface of an aluminum nitride single-crystal substrate without etching the surface includes scrubbing a surface of an aluminum nitride single-crystal substrate using a polymer compound material having lower hardness than an aluminum nitride single crystal, and an alkali aqueous solution having 0.01-1 mass % concentration of potassium hydroxide or sodium hydroxide, the alkali aqueous solution being absorbed in the polymer compound material.

Disclosed are a polymer electrolyte membrane showing high ion conductivity even under the condition of low humidity and high temperature and a method for manufacturing the same. The polymer electrolyte membrane of the present invention comprises a porous substrate, a self proton conducting material dispersed in the porous substrate, and an ion conductor impregnated in the porous substrate. The self proton conducting material comprises an inorganic particle functionalized with an azole ring.

A thermosetting resin composition and a prepreg and a laminated board prepared therefrom. The thermosetting resin composition contains the following components in parts by weight: 50-150 parts of a cyanate; 30-100 parts of an epoxy resin; 5-70 parts of styrene-maleic anhydride; 20-100 parts of a polyphenyl ether; 30-100 parts of a halogen-free flame retardant; 0.05-5 parts of a curing accelerator; and 50-200 parts of a filler. The prepreg and laminated board prepared from the thermosetting resin composition have comprehensive performances such as a low dielectric constant, a low dielectric loss, an excellent flame retardance, heat resistance and moisture resistance, etc., and are suitable for use in a halogen-free high-frequency multilayer circuit board.

The present invention is a low dielectric resin substrate, which is a composite including an annealed quartz glass cloth and an organic resin, where the annealed quartz glass cloth has a dielectric loss tangent of less than 0.0010 at 10 GHz, and tensile strength of 1.0 N/25 mm or more per cloth weight (g/m.sup.2). This provides a resin substrate that includes a quartz glass cloth which has a low dielectric loss tangent and which is also excellent in tensile strength.