摘要:
A magnetic recording medium comprising a non-magnetic base layer and an magnetic layer provided thereon which comprises a magnetic powder and a binder cured with a curing agent, wherein said binder has the hydroxyl group and said curing agent is a mixed polyvalent isocyanate compound comprising oligomers made of a diisocyanate monomer, wherein 50% by weight or more of said mixed compound comprises said oligomers which have polymerization degrees of 7 or less. The curing agent improves curing properties of the binder, and the magnetic recording medium produced therewith is excellent in sliding durability.
摘要:
The present invention provides a magnetic recording medium having a magnetic layer comprising a ferromagnetic powder dispersed in a binder so as to exhibit an excellent electromagnetic property.The magnetic recording medium has a magnetic layer formed on a non-magnetic body, from a magnetic paint mainly consisting of a ferromagnetic powder and a binding agent. This magnetic layer also contains a metal chelate compound of a diketone shown in Chemical Formula given below: ##STR1## wherein R.sup.1 to R.sup.3 are selected from a group consisting of hydrogen, halogen, hydroxyl group, nitro group, carboxyl group, carbonyl group, amino group, amide group, and sulfonic acid group as well as alkyl group, aryl group, hetero-aromatic group replaced therewith and wherein the metal of the chelate compound is Ti, Zr, Ni, Sn, Co, or Cr.
摘要:
A light yet highly workable magnetic substance is disclosed which consists mainly of a wholly novel material, fine crystal spherical carbon represented by C.sub.n X.sub.m where n is an integer selected from the group consisting of 60, 70, 76, 84, etc., m represents a positive number not more than n and not zero, and X represents at least one of hydrogen, fluorine, chlorine, bromine and iodine.
摘要:
A developer for electrostatic electrophotography which comprises a composition of colorant particles, an electric charge supplying agent and a resin binder dispersed in a dispersion medium. The resin binder is a copolymer which has a polyoxyethylene units at side chains thereof, so that the interaction with the electric charge supplying agent is improved. The resultant developer ensures good resolution, gradation and fixing property and is suitable for wet development to give high-quality images. When the copolymer used as the resin binder has styrene units therein, its solubility in the dispersion medium is improved. The developer is either liquid or solid depending on the type of dispersion medium.
摘要:
Disclosed herein are an ionic conductor including a proton conductor, a process for production thereof, and an electrochemical device (such as fuel cell) with said ionic conductor, said ionic conductor being superior in ionic conductivity, water resistance, and film forming properties. The ionic conductor is formed from a polymer in which carbon clusters having ion dissociating functional groups are bonded to each other through connecting groups. The polymer is less water-soluble and more chemically stable than a derivative composed solely of carbon clusters; therefore, it permits many ion dissociating functional group to be introduced thereinto. Moreover, if ion dissociating functional groups are introduced into also the connecting group, it is possible to prevent the concentration of ion dissociating functional groups from decreasing as the result of polymerization. The polymer can be easily synthesized by simple condensation, substitution, and hydrolysis. Therefore, the process is suitable for mass production in high yields.
摘要:
An ionic conductor, such as a proton conductor, a process for production thereof, and an electrochemical device, such as fuel cell, that includes the ionic conductor is provided. The ionic conductor of the present invention is formed from a polymer in which carbon clusters having ion dissociating functional groups are bonded to each other through connecting groups which can also include one or more ion dissociating functional groups. In this regard, the polymer is less water-soluble and more chemically stable than a derivative composed solely of carbon clusters, thus displaying enhanced ionic conduction properties.
摘要:
Methods and devices for producing fullerene are provided. The present invention includes a pair of electrodes spaced apart to define a region wherein an arc discharge can be conducted between the electrode pair and a gas containing carbon can be supplied to the region such that fullerene can be easily and readily produced.
摘要:
A method for preparing a carbonaceous complex struture including forming an adherent carbonaceous thin film on a smooth surface of a substrate and forming an adherent fullerine thin film on the thus formed carbonaceous thin film.
摘要:
A clathrate inclusion compound consisting essentially of a cyanine dye and organic host molecules including the cyanine dye therein is described. By the inclusion, the degradation of the cyanine dye by the attack of oxygen is avoided with respect to the absorbance, reflectance and the like characteristics. Optical recording media using the inclusion compound are also described.
摘要:
A method of manufacturing a tubular carbon molecule capable of regularly aligning a carbon nanotube with a finer spacing is provided. A catalyst is arranged on a material substrate (10) made of a semiconductor such as silicon (Si) and including iron (Fe) as a catalyst through the use of melting according to a modulated heat distribution (11). The heat distribution (11) is formed, for example, through diffracting an energy beam (12) by a diffraction grating (13). As a method of arranging the catalyst, for example, iron may be deposited in a planar shape or a projection shape in a position corresponding to the heat distribution (11), or the deposited iron may be used as a master to be transferred to another substrate. A carbon nanotube is grown through the use of the arranged catalyst. The grown carbon nanotube can be used as a recording apparatus, a field electron emission device, an FED or the like.