摘要:
A novel coating composition can be obtained by compounding 100 parts by weight of (A) acetylene-conjugated random copolymer having an acetylene unit content of 5-60 mol% and a block character P of 0.8-1.2 and 5-1,000 parts by weight of (B) carbon-carbon double bond-containing compound. The resulting coating composition shows a rapid curing velocity, which has never been seen, and provides an excellent coating film.When the above described composition is added with (C) a curing promoter or a radical initiator, the curing velocity is more increased and when the above described composition is added with (D) a filler or a pigment, excellent coating films suitable for various applications can be formed.
摘要:
An epoxidized acetylene-conjugated diene random copolymer, of which epoxy equivalent is within the range of from 50 to 1,000, is obtained by epoxidizing an acetylene-conjugated diene random copolymer, in which acetylene and conjugated diene are bonded linearly and randomly, the block character P is within the range of from 0.8 to 1.2 and the acetylene content is less than 60 mol%, with an organic peracid. The epoxidized acetylene-conjugated diene random copolymer is more reactive than the crude random copolymer and yields an excellent film, a coating material or a shaped article. Further by adding some of curing agents to the epoxidized acetylene-conjugated diene random copolymer, the cure rate of the epoxidized copolymer is fairly enhanced.
摘要:
A method for manufacturing a high molecular weight, elastic and random type butadiene-propylene copolymer whose propylene content is in the range of 3 to 45 mol%, which comprises copolymerizing butadiene and propylene in the molar ratio ranging from 1/10 to 10/1 at a temperature in the range of 0.degree. to 80.degree.C in the presence of a catalyst system consisting of (1) at least one compound selected from the group consisting of titanium tetrachloride, titanium tetrabromide and vanadyl trichloride, (2) an organoaluminum compound having the general formula, ALR.sup.1 R.sup.2 R.sup.3 wherein R.sup.1, R.sup.2 and R.sup.3 represent a hydrocarbon radical and (3) phosgene, in which said components (2) and (3) are mixed at room temperature prior to the addition of other catalyst components and of monomers. The resulting random butadiene-propylene copolymer is highly elastic and superior to cis-1,4-polybutadiene in resistance to thermal aging.
摘要:
This disclosure provides a horizontal radiation antenna including a grounded conductor plate on the back surface of a multilayer substrate, a radiation element to which a microstrip line is connected on a front surface of the multilayer substrate, and a passive element on an end portion side of the multilayer substrate compared with the radiation element. An intermediate grounded conductor plate is provided within the multilayer substrate between insulation layers and faces the microstrip line. The intermediate grounded conductor plate defines a notch portion whose end portion side is open. The intermediate grounded conductor surrounds the radiation element and the passive element in the notch portion. The intermediate grounded conductor is electrically connected to the grounded conductor plate.
摘要:
A production method of a base plate for a disk drive made by aluminum die casting which can reduce scattering of particles and minimizes particle contamination is provided. The production method of a base plate for a disk drive includes a forming step for forming a base member by aluminum die casting, a coating step for coating the base member with a resin film, a machining step for removing a part of the resin film and a surface layer of the base member in order to expose the aluminum surface, a pretreatment step for immersing the base member with the exposed aluminum surface in a pretreatment solution containing no fluoride, and a metal film forming step for coating the exposed aluminum surface with a metal film.
摘要:
A portable electronic device includes a circuit board and an antenna coil installed on the circuit board. The antenna coil includes a magnetic core and a coil wound at either side of an unwound portion. The winding direction of the coil is changed at either side of the unwound portion. When the length of the magnetic core is defined as X and the distance between two intersecting points at which a virtual line formed by projecting the central line of the magnetic core onto the circuit board intersects the outer periphery of the circuit board is defined as Y, the antenna coil satisfies Y≧X≧0.8Y.
摘要:
A technique for evaluation of the strength of a spot welded portion of a panel is provided. A stress value at the welded portion of the panel is calculated by a stress analysis according to a FEM using the elements, and then the strength of the welded portion is evaluated based on the stress value at the welded portion. A portion in the proximity of the spot welded portion is divided, with a central portion of the spot welded portion registered with a nodal point of the elements, into a central element and plural concentric ring-like elements from the center side provided by the central portion of the spot welded portion. Thereafter, the plural concentric ring-like elements are individually divided in a circumferential direction each into a plurality of portions to form the elements. Then, the strength is evaluated based on the stress value of the second ring-like element.
摘要:
At startup, a main CPU renders and copies various types of unique parameters stored in an SRAM card corresponding to an ID unique to endoscopes to DPRAM and SDRAM and enables the endoscopes to be used with these parameters. Also in the event of desiring to change the set parameters, the user requests a change via an HM, whereby the changed parameters are copied to the SDRAM via the DPRAM, and electrically-operated curving actions of the endoscope can be performed with the changed parameters.
摘要:
A radiation-sensitive resin composition comprising an acid-labile group-containing resin obtained by living radical polymerization having a specific structure which is insoluble or scarcely soluble in alkali, but becomes alkali soluble by the action of an acid, and a photoacid generator, wherein the ratio of weight average molecular weight to number average molecular weight (weight average molecular weight/number average molecular weight) of the acid-labile group-containing resin is smaller than 1.5.
摘要:
A CPU includes: an original image recording function for recording a still image or a recorded image as an original image; a contrast correction function for performing contrast correction on a still image or a recorded image; a coordinate calculation function for calculating pixel coordinates on an original image which correspond to pixel coordinates designated on a contrast corrected image; a stereo measurement function for performing stereo measurement using pixel coordinates of an original image calculated by the coordinate calculation function; a measurement result reflection function for reflecting on a contrast corrected image a measurement result of stereo measurement performed by the stereo measurement function; and a dynamic range expansion function for enhancing brightness of an image area which is darker than a predetermined threshold. These functions enable stereo measurement to be performed precisely using an image on which image processing has been performed.