Abstract: An aspect of the present invention relates to a binder resin composition for a magnetic recording medium, which comprises a vinyl chloride resin containing a radiation-curable functional group, and a methacrylate compound denoted by formula (A): in an amount of equal to or more than 0.3 weight percent but equal to or less than 10 weight percent relative to a content of the vinyl chloride resin.

Abstract: The present invention provides a magnetic recording medium which has a back coat layer excellent in surface smoothness and durability and is excellent in electromagnetic conversion property. A magnetic recording medium, comprising at least a non-magnetic support, a lower non-magnetic layer on one surface of the non-magnetic support, an upper magnetic layer on the lower non-magnetic layer, and a back coat layer on the other surface of the non-magnetic support, wherein the lower non-magnetic layer contains at least carbon black, a non-magnetic inorganic powder other than carbon black, and a binder resin material, the upper magnetic layer contains at least a ferromagnetic powder, and a binder resin material, and the back coat layer contains at least carbon black, a non-magnetic inorganic powder other than carbon black, a carboxylic acid amine salt, a phosphate amine salt, and a binder resin material.

Abstract: A magnetic recording medium including a support having thereon a magnetic layer and a non-magnetic layer in this order, the magnetic layer being formed by applying and drying a magnetic nanoparticle dispersion liquid in which magnetic nanoparticles having a number average particle diameter of 20 nm or less are dispersed, applying the non-magnetic layer onto the magnetic layer, fixing the magnetic nanoparticles, and carrying out annealing for ferromagnetization, and the non-magnetic layer containing a gelatinous composition formed by gelating at least one selected from hydrolysates of the silane compound represented by (R10)m—Si(X)4-m and partial condensates thereof, wherein R10 represents a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; X represents a hydroxy group or hydrolyzable group; and m represents an integer from 1 to 3.

Abstract: A magnetic recording medium and method for forming the magnetic recording medium are described. The magnetic recording medium includes a magnetic layer formed on a non-magnetic support, and a lubricant layer over the magnetic layer. The lubricant layer includes a compound selected from hydrocarbyl-substituted cyclopentanes, hydrocarbyl-substituted cyclopentenes, hydrocarbyl-substituted cyclopentadienes, and mixtures or derivatives thereof and, optionally, one or more additives. The lubricant layer also may be used on a magnetic head for reading and writing information on a magnetic recording medium. The magnetic recording medium and the magnetic head may be used to manufacture computer disk drives, compact disk drives, audio equipment, and video equipment.