摘要:
A curing agent for an epoxy resin comprises a cyclodextrin clathrate compound of a compound which is reactive with an epoxy group, a curing agent for an epoxy resin comprising a mixture of a cyclodextrin clathrate compound of a compound which is reactive with an epoxy group with a trace amount of amylase, and methods for the preparation of these curing agents. The curing agents are stable at room temperature, and the curing reaction is initiated under remarkably simple conditions.
摘要:
A toilet article comprises a sheet-like material (1), a pressure sensitive adhesive layer (2) formed on the sheet-like material (1) and hydrogel formable polymer layer (3) formed on the surface of the pressure sensitive adhesive layer (2).The sheet-like material (1) may be a film obtained from flexible synthetic resin such as polyethylene, polypropylene, polyester, polyamide, polyurethane, polyvinyl alcohol, rayon, polyvinyl chloride, a sheet of an unwoven fabric or a woven fabric, or a porous film.The pressure sensitive adhesive layer (2) is sticky and may be an acrylic resin adhesive, a polyester resin adhesive, a rubber adhesive or an elastomeric adhesive.The hydrogel formable polymer is a substance which forms gel when water is applied to it and has a water retention characteristic of between ten times and one hundred times.Typically, usable hydrogel substances are crosslinked substances of alkali metal salt of carboxymethylcellulose, alkali metal salt of polyacrylic acid, crosslinked substance of polyalkylene oxide, cellulose, carboxylic alkali metal salt formed from acrylonitrile graft polymer, starch-acrylonitrile substance, any of which has a good water absorbent and water retention.The hydrogel formable polymer layer may have cosmetics in a water free condition contained therein or coated on the surface thereof.
摘要:
A color video signal recording apparatus recording a luminance signal and a chrominance signal on separate tracks in which a pair of chrominance component signals are time-compressed and serially recorded as the chrominance signals. In this case, there are provided a timebase compressor for time-compressing the pair of chrominance component signals and a clock generator for supplying a clock signal to the timebase compressor wherein the frequency of the clock signal is selected to be an integral multiple of the horizontal frequency.
摘要:
An internal combustion engine is provided which comprises an outside member including a cylinder block section and a crankcase half section which are both casted into a single body, the crankcase having an opening formed therein which has an opening edge arranged in an inclined relationship to the center axis of a cylinder and also to the center axis of a crankshaft, and a crankcase half having a corresponding opening edge thereon for covering the opening of the crankcase half section.The inclined opening of the crankcase half section facilitates working of the inside of the crankcase half section and the cylinder block section and assembling of internal parts within the outside member.
摘要:
The present invention relates to a re-sealable dispenser-container and a process for producing the container. The dispenser-container comprises a main container body made of impervious material with at least one opening, a flap having a pressure-sensitive adhesive surface and fixed to the main body at one end thereof to cover the opening, and a non-adhesive member adhered to the adhesive surface and which member is used for closing the opening in order to prevent the adhesive surface from directly contacting the contents. The process comprises punching a perforated line in a sheet used for the main body, disposing a flap on the sheet so as to cover the perforated line, fixing one end of the flap to the sheet, and sealing the sheet longitudinally and transversely.
摘要:
The pH of a chemical copper plating solution is exactly measured for a prolonged time by utilizing a copper oxide prepared by etching metallic copper in an 0.1-1 N inorganic acid then oxidizing the etched metallic copper in an aqueous 0.1-1 N alkali metal hydroxide solution as a main electrode for pH measurement or reducing agent concentration measurement in terms of pH.A combination of the pH measurement with well known procedures for measuring concentrations of cupric ions and a complexing agent exactly measures the pH and the concentrations of a reducing agent, cupric ions and a complexing agent for a continuation of longer time than the conventional procedures.
摘要:
A concentration of copper ions, a concentration of a reducing agent, a concentration of a complexing agent and a pH of a chemical copper plating solution are continuously detected all as potentials, and continuously controlled with a good accuracy.
摘要:
The hub section of a pointer is provided with first and second light reflecting curved surfaces which are arranged on opposite portions with respect to the axis of the spindle of the movement. The first light reflecting curved surface is formed on a part of walls defining a recess formed in the hub portion.
摘要:
A light guiding plate integral with a dial board proper of a transparent material is formed with a light reflecting surface which is such constructed that the light entering the light guiding plate from a top of the same is reflected by the light reflecting surface to be directed toward a portion, where the light guiding plate and the dial board proper are integrally connected, for focalization of the light in the vicinity of an opening of the dial board proper through which a spindle of a movement passes.
摘要:
For recording and reproducing analog audio signals by a pulse-code modulation scheme so as to permit effective compensation for dropout errors, an incoming audio signal is sampled, and the analog samples are converted into a sequence of coded pulse groups or words. These words are grouped into successive notional blocks, and the odd and the even words, for example, of each block are divided into sub-blocks, as by sequentially writing the words of each block in successive storage locations in a memory and by retrieving the odd, and then the even, words from the memory. The sub-blocks of the successive word blocks are recorded in different regions on a recording medium such as magnetic tape. After being reconverted into an electrical signal from the recording medium, the words of the sub-blocks of each block are rearranged into the original order, as by use of a second memory, prior to the reconstruction of the analog audio signal.