摘要:
A novel room temperature-curable organopolysiloxane-based composition is proposed which is capable of giving a surface coating highly insusceptible to surface stain even by exposure over years. The composition comprises: (A) a block copolymer composed of dimethylsiloxane units and trifunctional siloxane units of which the organic group is a phenyl group or a fluorine containing aliphatic group, in a specified molar proportion; (B) an organosilane compound having hydrolyzable groups; and (C) a polyoxyalkylene-modified organosiloxane compound of the formula (Me.sub.3 SiO--).sub.2 SiR.sup.4 --C.sub.3 H.sub.6 --(--O--R.sup.5 --).sub.b --O--SiR.sup.6.sub.a X.sub.3-a, in which Me is a methyl group, R.sup.4 is a methyl group or trimethylsiloxy group, R.sup.5 is an ethylene group or propylene group, R.sup.6 is a monovalent hydrocarbon group, X is a hydrolyzable group, the subscript a is zero or 1 and the subscript b is a positive integer not exceeding 50, with optional addition of a condensation catalyst.
摘要:
Disclosed herein are a carbon fiber-reinforced carbon composite material composed of carbon as a matrix and carbon fiber as a reinforcement, and also a process for producing the same. The composite material is produced by coating nonwoven fabrics of carbon fiber or a blend of carbon fiber and organic fiber with a filler-containing liquid, laminating the nonwoven fabrics one over another, and subjecting the laminated nonwoven fabrics to needle punching repeatedly with a plurality of needles, thereby yielding a prepreg of three-dimensional structure, and carbonizing and calcining the thus obtained prepreg.
摘要:
The silicone rubber composition of the invention essentially comprises (a) a silanolic hydroxy-terminated diorganopolysiloxane, (b) a hydrolyzable vinyl silane compound such as a vinyl trialkoxysilane and (c) an organopolysiloxane having at least two mercapto groups in the form of, for example, 3-mercaptopropyl groups, in a molecule. The composition can be cured by two different mechanisms of crosslink formation one by the condensation reaction between the silanol groups in (a) and the hydrolyzable groups in (b) in the presence of atmospheric moisture and the other between the vinyl groups in (b) and mercapto groups in (c) under irradiation with ultraviolet light. The two-way cruability of the composition greatly expands the application fields of the silicone rubber composition.
摘要:
The invention provides a novel diorganopolysiloxane compound composed of dimethysiloxane units, methyl (2-perfluoroalkylethyl)siloxane units and methyl acyloxyalkylsiloxane units. The novel diorganopolysiloxane compounds of the invention have excellent lubricating properties so that they are useful as an additive ingredient in various materials such as coating compositions, magnetic layer of recording tapes and the like where lubricity or mold releasability is essential.
摘要:
The invention relates to an apparatus for incising on a film to be processed the precise contour of a required photographic image so as to obtain a process block for prints in which such photographic image is to be inserted. The apparatus comprises a data input unit capable of detecting the precise contour by causing a light pen to trace the general contour of a required image on a photocopy; an output unit capable of incising the contour on a film to be processed by receiving signals of the positions of the precise contour detected by the input unit; and a control unit capable of performing a control operation, such as relay, comparison, etc. of the signals between the input unit and the output unit.
摘要:
Printing ink compositions which are suitable for use in the method of dry-planographic printing on a high-speed web offset press are provided wherein an ink vehicle comprises from 1 to 70% by weight of a silicone-modified phenolic resin prepared by reacting an oil-soluble solid phenolic resin with an amino group-containing organopolysiloxane. Said ink compositions are capable of producing copy sheets without the occurrence of scumming and the piling of ink throughout a long continuous operation by the said printing method.
摘要:
Novel organosilicon compounds having in a molecule at least one maleimido group bonded to a silicon atom through a Si-C linkage, synthesized by reaction of a derivative of maleic anhydride with an organosilicon compound having an amino-substituted hydrocarbon group bonded to the silicon atom. The reaction proceeds in two steps, the first step being addition of the amino group to the maleic anhydride derivative to form an amide structure and the second step being dehydration of the amide structure to form a maleimido ring. The organosilicon compounds having remarkable photosensitivity can be polymerized and cured on exposure to ultraviolet light, and the cured films are insoluble in organic solvents.
摘要:
A fracture caused by fatigue of a connecting portion positioned at a corner of a reinforcing frame directly secured to a frame is avoided regardless of a relative displacement that occurs in the frame upon disposing the reinforcing frame made of steel, which has an elevational shape surrounding the frame along an inner circumferential surface of the frame and a cross-sectional shape with a flange on a side of the frame, in a structure plane of the frame of a column and a beam of reinforced concrete structure, and joining the reinforcing frame to the inner circumferential surface of the frame. A reinforcing frame is constituted of a column portion along a column of a frame, a beam portion along a beam, and a connecting portion that is joined to the column portion and the beam portion, and connects the column portion to the beam portion. The connecting portion has a flange with a part close to the column portion and the beam portion formed to be shaped along an inner circumferential surface of the frame, and a part of the flange facing a corner of the frame formed into a shape in which a void is formed between the part and the corner of the frame.
摘要:
A material for an organic electroluminescence element, characterized in that it comprises a platinum complex formed from a platinum ion and a ligand having at least one aryl group being not capable of free rotation or at least one aromatic heterocyclic group being not capable of free rotation; a display device, characterized in that it comprises said material for an organic electroluminescence element and exhibits high luminous efficiency and long luminous life; and an illumination device, characterized in that it comprises said material for an organic electroluminescence element and exhibits high luminous efficiency and long luminous life.
摘要:
A semiconductor device 2 has a plurality of elements. It also has an F-V table storing unit for low voltage threshold cells 31 for storing an F-V table TB11 of an oscillation frequency f1 relying on the plurality of elements and a power supply voltage EV to be supplied to the plurality of elements. It has a process sensor block 12 having at least one of the plurality of elements, for monitoring the oscillation frequency f1 relying on at least one element. It further has a selector 33 for setting the power supply voltage EV associated with the oscillation frequency f1, as the supply voltage to be supplied to the semiconductor device 2 by selecting according to the F-V table TB11. The F-V table TB11 is obtained by mutually relating the combinations of random number models ξn between an F-ξ table TB20 and an ξ-V table TB30.