发明名称 |
Magnetic recording medium |
摘要 |
S/N characteristic and durability of recording medium e.g. video tape or magnetic disket are improved by using as bonding resin used in the magnetic paint to make the magnetic layer a polyester-based polyurethane having a number average molecular weight of 5,000-100,000 and containing at least two hydroxyl group and at least one sulfone bond therein, through improvement of dispersibility of fine magnetic powder in the magnetic paint.
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申请公布号 |
US4910089(A) |
申请公布日期 |
1990.03.20 |
申请号 |
US19880230678 |
申请日期 |
1988.08.08 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
MITAKE, HIROSHI;WAKABAYASHI, TAKASHI;SUZUKI, HIROSHI;UESHIBA, NOZOMU |
分类号 |
C08G18/46;C09D5/23;C09D175/00;C09D175/06;G11B5/702 |
主分类号 |
C08G18/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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