发明名称 |
Magnetic recording medium comprising ferromagnetic powder and a specified polyurethane resin |
摘要 |
In a binder for a magnetic recording medium for forming a magnetic layer with ferromagnetic powder dispersed therein being arranged on a non-magnetic support member, whereby said binder consists of a polyurethane resin, which is a reaction product of diol and organic diisocyanate as principal materials, said polyurethane resin contains a short-chain diol having cyclic structure by 17 to 40 weight %, and said polyurethane resin contains a long-chain diol comprising 1.0 to 5.0 mmol/g of ether group to total urethane resin by 10 to 50 weight %. According to a binder for a magnetic recording medium and a magnetic recording medium using said binder of the present invention, good dispersion property, high running durability and preservation property can be obtained.
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申请公布号 |
US5702821(A) |
申请公布日期 |
1997.12.30 |
申请号 |
US19950555447 |
申请日期 |
1995.11.09 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
MURAYAMA, YUICHIRO;SATAKE, MASAKI;HASHIMOTO, HIROSHI;OKITA, TSUTOMU |
分类号 |
C09D5/23;C09D175/00;C09D175/04;G11B5/702;(IPC1-7):G11B5/702 |
主分类号 |
C09D5/23 |
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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