Abstract:
PURPOSE:To produce the title pitch which gives a carbon fiber having excellent spinnability and mechanical properties, by heating a particular carbon material, removing solid and catalyst powder and separating low-boiling fractions, followed by heat treatment. CONSTITUTION:A raw material comprising at least one component selected from pitches obtd. by conducting heat treatment of a high-boiling oil prepd. by fluid catalytic cracking of oil or a distillate or residual oil prepd. by distillation of such a high-boiling oil and having an atomic ratio C/H of 0.7-1.4 and an arom. carbon content of 0.4-0.9, is heated at 350-500 deg.C under an autogenic pressure of 2-300kg/cm for 5min
Abstract:
@ An inorganic fiber-reinforced ceramic composite material comprising a matrix of a ceramic and inorganic fibers as a reinforcing material, characterized in that(a) the inorganic fibers are specified inorganic fibers containing silicon, either titanium or zirconium, nitrogen and oxygen, and(b) the ceramic is at least one material selected from the group consisting of carbides, nitrides, oxides, glass ceramics, graphite and specified inorganic materials containing silicon, either titanium or zirconium, nitrogen and oxygen.
Abstract:
An inorganic fiber-reinforced plastic composite material comprises a plastics matrix and from 10 to 70% by volume of the composite material of inorganic fibers as a reinforcing material, said inorganic fibers containing silicon, either titanium or zirconium, carbon and oxygen and being composed of (1) an amorphous material consisting substantially of Si, M, C and O, in which M represents Ti or Zr; (2) an aggregate consisting substantially of ultrafine crystalline particles of beta-SiC, MC, a solid solution of beta-SiC and MC and MC1-x having a particle diameter of not more than 400 ANGSTROM , and amorphous SiO2 and MO2, in which M is as defined above and x is a number represented by 0
Abstract:
PURPOSE:The titled composite material, containing inorganic fibers consisting mainly of Si, Ti or Zr, C and O as a reinforcing material within a specific range and a plastic as a matrix, having improved various mechanical properties and suitable to a material for synthetic fibers, etc. CONSTITUTION:A composite material, consisting of inorganic fibers as a reinforcing material and a plastic as a matrix. The above-mentioned composite material contains 10-70vol% inorganic fibers, containing Si, Ti or Zr, C and O and consisting of (i) an amorphous material consisting substantially of Si, M, C and O or (ii) an aggregate consisting substantially of respective crystalline ultrafine particles of beta-SiC, MC and solid solution of beta-SiC and MC and crystalline ultrafine particles of MC1-x having
Abstract:
PURPOSE:A lubricant oil composition with good detergent and dispersing property and shear stability, which is composed of an imidized hydrogenated polybutadiene prepared by imidization of most part of maleic anhydride in a specific maleinized and hydrogenated polybutadiene with a polyamine.
Abstract:
PURPOSE:A lubricating oil composition having a high viscosity index and an excellent shear stability containing a polymer obtained by hydrogenation of a polybutadiene of high melting temperature with high content of 1, 2-structure.