Magnetic recording medium

Abstract

Abstract PURPOSE:To improve durability, magnetic characteristics, electromagnetic conversion characteristic, etc. by using a vinyl chloride copolymer having double bonds sensitive to electron rays and a ternary amine salt of a sulfonic acid or ternary amine salt of sulfate as a polar group in the molecule for a binder constituting a magnetic layer. CONSTITUTION:The vinyl copolymer having the double bonds sensitive to electron rays and further having the ternary amine salt of the sulfonic acid and the ternary amine salt of sulfate as the polar group in the molecule is used as the binder for the magnetic material, by which the high affinity to magnetic powder is exhibited and the good dispersibility is obtd. even with the ultrafinely pulverized magnetic powder or the magnetic powder having a large quantity of magnetization. The durability and surface characteristic of the resulted magnetic recording medium are improved and the electromagnetic conversion characteristic is extremely highly improved as well. Since the binder has the double bonds sensitive to electron rays in the molecule, the magnetic coated film is easily cured by the irradiation of electron rays and the process for production is extremely simplified; in addition, the pot life and solidification of the paint are improved and thus there are many advantages in the process.

Inventors

• 👤 Seiichi Ikuyama
• 👤 生山　清一
• 👤 Yoshinobu Ninomiya
• 👤 二宮　良延
• 👤 Hiroshi Yoshioka
• 👤 博 吉岡
• 👤 Ichirou Ono
• 👤 猪智郎 小野

Bibliographic Details