公开(公告)号：WO1982000914A1

公开(公告)日：1982-03-18

申请号：PCT/JP1981000204

申请日：1981-08-28

Applicant: TOYO INK MFG CO LTD ,  TDK ELECTRONICS CO LTD ,  OHTSUKI A ,  TANAKA K ,  KONNO R ,  SHINOURA O ,  SUGAI M ,  KUBOTA Y ,  NISHIMATSU M

Inventor： TOYO INK MFG CO LTD ,  TDK ELECTRONICS CO LTD

IPC: G11B05/70

CPC classification number: G11B5/7013 ,  Y10S428/90 ,  Y10T428/31609 ,  Y10T428/31935

Abstract: A magnetic recording medium with excellent electromagnetic characteristics, durability and mobility. The magnetic recording medium is produced by coating magnetic paint prepared by kneading magnetic powder with crosslinking or polymerizable resin binder together with phosphoric ester having polymerizable unsaturated double bond on a base and crosslinking or polymerizing the paint. Since the phosphoric ester is added as compared with the conventional dispersant, it improves the mechanical characteristics of the magnetic paint film and also improves the durability and the mobility of the magnetic recording medium.

Abstract translation: 具有优异电磁特性，耐久性和流动性的磁记录介质。 该磁记录介质通过将含有交联或可聚合树脂粘合剂的磁性粉末与具有可聚合不饱和双键的磷酸酯捏合在基底上并使涂料交联或聚合而制备的磁性涂料来制备。 由于与常规分散剂相比添加磷酸酯，因此改善了磁性漆膜的机械特性，并且还提高了磁记录介质的耐久性和迁移率。

公开(公告)号：WO1981002646A1

公开(公告)日：1981-09-17

申请号：PCT/JP1981000041

申请日：1981-03-02

Applicant: TDK ELECTRONICS CO LTD ,  TOYO INK MFG CO LTD ,  SUGAI M ,  OHTSUKI A ,  TANAKA K ,  KUBOTA Y ,  IMAOKA Y

Inventor： TDK ELECTRONICS CO LTD ,  TOYO INK MFG CO LTD

IPC: G11B05/70

CPC classification number: G11B5/7026 ,  C08G18/6212 ,  C08G18/671 ,  C08G18/8158 ,  G11B5/7022 ,  C08G18/62

Abstract: A magnetic recording medium useful for magnetic tape, magnetic cords, magnetic discs, etc., which is prepared by using (A) a radiation-hardenable compound having a molecular weight of not less than 5000, preferably not less than 8000, and having two or more unsaturated double bonds, (B) a radiation-hardenable compound having a molecular weight of not less than 400 and less than 5000, preferably 600 to 3000, and having one or more unsaturated double bonds, and (C) a radiation-hardenable compound having a molecular weight of less than 400 and having one or more unsaturated double bonds, coating a magnetic paint on a base material, the magnetic paint primarily containing magnetic particles prepared by compounding (A) and (B), or (A), (B) and (C), and a solvent, and, after preliminary drying, irradiating it.