MAGNETIC RECORDING MEDIUM

摘要

PURPOSE:To decrease coefft. of friction and to improve largely durability by coating a magnetic layer which consists essentially of tristearyl phosphate and in which a higher fatty acid and fatty acid ester lubricating agent are incorporated on a base. CONSTITUTION:This magnetic recording medium is formed by coating the magnetic layer which consists essentially of the tristearyl phosphate and into which the higher fatty and fatty acid ester lubricating agent are incorporated on the base. The tristearyl phosphate when incorporated into the magnetic layer contributes to a decrease in the coefft. of friction of said layer and improves wear resistance thereof. The higher fatty acid is adsorbed to the magnetic powder when dispersed into the magnetic paint. The higher fatty acid adsorbed thereon acts as a dispersant or lubricating agent for the magnetic powder and improves the adhesiveness between the base and the magnetic layer. The fatty acid ester has good affinity to the higher fatty acid, tristearyl phosphate and binder and therefore the relief of the tristearyl phosphate to the surface of the magnetic layer is suppressed and the wear resistance of the magnetic layer is improved as the sustaining effect of the lubricating agent acts synergistically.