摘要:
A lighting unit, e.g. an LED bulb or a straight LED luminaire, which illuminates a wide range and is configured with low cost. In a light-emitting diode lamp, a board assembly is disposed in a lamp main body, and light-emitting diodes are attached to the board assembly. The board assembly comprises a plurality of flexible printed circuit boards. Each flexible printed circuit board includes a base in the form of a flat plate, respective connections to a power supply portion of the light-emitting diode lamp are provided at two ends of the base, and the base is bent at a plurality of points of a middle portion to form a top surface portion and side surface portions. The flexible printed circuit boards are three-dimensionally assembled such that the top surface portions cross each other and such that one of the top surface portions lies on top of another.
摘要:
In the case of using a photosensitive insulating resin for a surface protective layer of a circuit wiring pattern, or for an insulating layer between circuit wiring conductor layers in a circuit board, Na ions adsorbed on the photosensitive insulating resin are replaced with a polyvalent metal through a treatment step containing Na ions which is executed after a heat curing step of the photosensitive insulating resin. For the polyvalent metal, a II group including Mg or Ca can be selected.
摘要:
An acrylic elastomer composition comprising (A) a halogen-containing acrylic elastomer, (B) a polyvalent carboxylic acid, (C) a quaternary onium salt and (D) a hydrotalcite can be vulcanized within a shorter vulcanization time to give a vulcanization product having distinguished normal state physical properties and compression set characteristics, even without any secondary vulcanization.
摘要:
A peroxide-vulcanizable fluorine-containing elastomer containing iodines as cross-linking sites, capable of producing vulcanization products having a distinguished heat resistance is produced by polymerization reaction of a fluorinated olefin having 2 to 8 carbon atoms in the presence of a diiodide compound represented by the following general formula:
I-R-I
where R is a divalent fluorohydrocarbon group, chlorofluorohydrocarbon group or hydrocarbon group, having 2 to 8 carbon atoms, respectively, and 2,2-difluoroiodoethylene.
摘要:
A rubber compound comprising a fluorine rubber component and an acrylic rubber component is produced by adding an acrylic monomer to an aqueous emulsion of fluorine-containing elastomer obtained by emulsion polymerization, using a fluorine-containing surfactant, followed by radical polymerization reaction. The obtained rubber compound can satify both of vulcanization moldability and heat aging resistance, and is at a lower cost than the expensive fluorine rubber.
摘要:
An analgesic-anti-inflammatory drug comprising quercetin-3-0-glucoside or a friedelan type compound (friedelin, friedelan-3-α-ol or friedelan-3-β-ol) separated from the alcohol extract of Maytenus ilicifolia as an effective component. The friedelan type compound has been already found to have an anti-ulcerative effect and therefore can be used as an analgesic-anti-inflammatory drug without any side effect such as gastrointestinal disorder (generation of ulcer), etc. as caused by a non-steroid anti-inflammatory analgesics.
摘要:
A fluorine-containing elastomer composition comprising a fluorine-containing elastomer having a cyano group as a cross-linkable group and a bisamidrazone compound represented by the following general formula as a vulcanizing agent: wherein Rf is one of the following groups: (CF 2 )n, CFX(OCF 2 CFX)mO(CF 2 )n and CFX(OCF 2 CFX)pO(CF 2 )nO(CFXCF 2 O)qCFX has considerably improved roll kneadability and processability during the vulcanization-molding, and gives vulcanization products having good heat resistance and solvent resistance.