摘要:
[Problem]To provide a method for producing a polyol-crosslinking, crosslinked fluororubber product which exhibits low tack properties and significantly increased rubber hardness.[Means for Solving the problem] The method comprises pressurizing, heating, and vulcanizing a fluororubber composition to mold a vulcanized product; the fluororubber composition comprising a polyol-crosslinkable fluororubber, a crosslinking accelerator including a quarternary phosphonium salt or a quarternary ammonium salt, and a polyol crosslinking agent, the weight ratio X of the crosslinking accelerator to the polyol crosslinking agent (crosslinking accelerator/polyol crosslinking agent) being from 0.90 to 3.00 for a quarternary phosphonium salt, and being from 0.4 to 0.6 for a quarternary ammonium salt; applying a treatment solution containing the polyol crosslinking agent and the crosslinking accelerator dissohttp://reedman/Manuals/Text_Manual/Section_03.htm - 3.1lved in a solvent to a surface of the vulcanized product; and heat-treating the resulting vulcanized product at a temperature ranging from 200 to 300° C. for 1 to 20 hours.
摘要:
A simulation apparatus is provided with means for obtaining shape data expressing a simulation object, means for storing a constraint condition for a simulation in association with each type of object, means for storing, for each of one or more evaluation items for evaluating an object having an arbitrary shape satisfying the constraint condition, a procedure of a coupled analysis using one or more simulation means related to the evaluation item, means for accepting a type and an evaluation item for an object, means for reading out a procedure of a coupled analysis corresponding to the evaluation item based on the accepted evaluation item for the object, and means for reading out a constraint condition for an object corresponding to the accepted type and giving the constraint condition to the shape data to execute the coupled analysis in accordance with the procedure of the coupled analysis.
摘要:
An optical characteristic measurement device includes a photodetector and a processor. The photodetector has a detection surface greater than a light incident surface receiving light from a spectrometer. The processor is configured to obtain a measurement spectrum detected in a first detection area corresponding to the light incident surface and a signal intensity detected in a second detection area different from the light incident surface, correct a pattern prepared in advance and exhibiting a noise characteristic of the photodetector based on the signal intensity to calculate a first correction spectrum, subtract a correction value calculated based on the signal intensity from each component value of the measurement spectrum to calculate a second correction spectrum, and subtract each component value of the first correction spectrum from a corresponding component value of the second correction spectrum to calculate an output spectrum.
摘要:
A processing unit obtains a first spectrum detected in a first detection area and a first signal intensity detected in a second detection area after the light entering the housing is cut off, and then calculates a first correction spectrum by subtracting a first correction value calculated based on the first signal intensity from each component value of the first spectrum. The processing unit obtains a second spectrum detected in the first detection area and a second signal intensity detected in the second detection area while a cut-off portion is opened, and then calculates a second correction spectrum by subtracting a second correction value calculated based on the second signal intensity from each component value of the second spectrum. The processing unit calculates an output spectrum representing a measurement result by subtracting a corresponding component value of the first correction spectrum from each component value of the second correction spectrum.
摘要:
It is an object of the present invention to provide a rubber composition having: excellent sealing properties, heat resistance and acid resistance; a low reaction force, low hardness and low compression set; and excellent low-temperature recovery properties that contribute to sealing properties particularly in low-temperature environment. It is another object of the invention to provide uses of the rubber composition and main bodies on which the rubber composition has been mounted. The rubber composition of the present invention comprises a specific ethylene/α-olefin/non-conjugated polyene copolymer [A], a SiH group-containing compound [B] having two SiH groups in one molecule, and a SiH group-containing compound [C] having three SiH groups in one molecule.
摘要:
The present invention is a method for identifying agents that modulate the GTPase activity of AS160. In the instant assay, AS160 or the GAP domain thereof is contacted with a test agent, in the presence of GTP-bound Rab (2A, 8A, 8B, 10, or 14), and the AS160 GAP domain-mediated hydrolysis of GTP to GDP is monitored.
摘要:
[Problem] To provide a fluororubber composition that does not suffer from deposition, during extrusion, of a talc component contained in a heat- and low-temperature-resistant colorable fluororubber, that is capable of providing products having performance equal to that of conventional mass-produced materials, and that is capable of substantially reducing the rejection rate in the preparation of green stock; and a process for producing a crosslinked fluororubber product.[Means for Solving the Problem] A fluororubber composition comprising a fluororubber containing a fluoropolymer that is crosslinkable with a peroxide; a peroxide crosslinking agent; and a heat-resistant filler containing a calcined talc having a hydrophilic surface; a content of the calcined talc being from 2 to 20 parts by weight based on 100 parts by weight of the fluoropolymer. Preferably, the fluoropolymer that is crosslinkable with a peroxide is a low-temperature-type terfluoropolymer having a TR10 value of from −40 to −25° C.; and more preferably, the low-temperature-type terfluoropolymer is a vinylidene fluoride/perfluoro(methyl vinyl ether)/tetrafluoroethylene terfluoropolymer.
摘要:
A polyol-crosslinkable fluororubber composition comprises 100 parts by weight of polyol-crosslinkable fluororubber; 0.5 to 10 parts by weight of a perfluoroalkane represented by the general formula F(CF2)2nF (n: 5˜30), a 1H-perfluoroalkane represented by the general formula F(CF2)mH (m: 10˜30), or a mixture thereof; 0.5 to 2 parts by weight of basic magnesium aluminum hydroxycarbonate hydrate; and 1 to 5 parts by weight of an acid acceptor compound excluding Ca compounds. The fluororubber composition can simultaneously attain improvement in preservation stability of compounds, prevention of compounds from adhesion at the time of kneading, short-time vulcanization, improvement of mold releasability at the time of vulcanization molding, prevention of contamination with metal ions and reduction in adhesiveness of crosslinking products due to increase of crosslinking density without substantially impairing the normal state physical properties or compression set characteristics and further advantage-ous properties inherent in the fluororubber, and contains no calcium compounds causing contamination of HDD.
摘要:
A motion picture moving on a display screen 21 of a display device 2 to be evaluated is captured a plurality of times by means of a galvano camera 3a. The captured data include locations of the moving picture in the moving direction on the display device 2 to be evaluated and data on luminance of the display device at the respective time points of the locations. Based on these data, a motion picture eye-tracking simulation is performed, where an integration along the eye tracking direction over an integral multiple of 1 frame time is performed to obtain a motion picture response curve of the display device 2 to be evaluated. Evaluations of motion picture characteristics and motion picture blur can be made based on the motion picture response curve.
摘要:
A fluororubber composition includes a polyol-crosslinkable fluororubber, a crosslinking accelerator, a polyol crosslinking agent and calcium hydroxide, with the crosslinking accelerator having a specific weight ratio relative to the polyol crosslinking agent, and is heat treated under specific conditions to give a low-friction fluororubber crosslinked product that is well balanced and excellent in properties such as low frictional properties, low tackiness and low resilience properties and that is favorably employed as rubber vibration insulators and impact-absorbing stoppers represented by HDD stoppers.