发明授权
US4320171A Magnetic recording media containing elastomeric polyurethane binders in
the magnetic coating
失效
在磁性涂层中含有弹性聚氨酯粘合剂的磁记录介质
- 专利标题: Magnetic recording media containing elastomeric polyurethane binders in the magnetic coating
- 专利标题(中): 在磁性涂层中含有弹性聚氨酯粘合剂的磁记录介质
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申请号: US150749申请日: 1980-05-19
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公开(公告)号: US4320171A公开(公告)日: 1982-03-16
- 发明人: Herbert Motz , August Lehner , Heinrich Hartmann , Rudolf Bachmann , Hans-Joerg Hartmann , Harald Frischmann , Roland Falk , Joachim Hack , Milan Velic , Helmut Kopke
- 申请人: Herbert Motz , August Lehner , Heinrich Hartmann , Rudolf Bachmann , Hans-Joerg Hartmann , Harald Frischmann , Roland Falk , Joachim Hack , Milan Velic , Helmut Kopke
- 申请人地址: DEX
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX
- 优先权: DEX2753694 19771202
- 主分类号: C08G18/66
- IPC分类号: C08G18/66 ; C09D5/23 ; G11B5/702 ; B32B27/40 ; B32B5/16
摘要:
Magnetic recording media comprising a non-magnetic base and, applied thereto, a firmly adhering magnetic coating based on a finely divided magnetic pigment dispersed in a binder which contains at least 50 percent by weight of a special polyurethane elastomer, namely a thermoplastic polyurethane which is soluble in tetrahydrofuran, is free from isocyanate groups and has been manufactured from (A) 1 mole of a hydroxyl-containing polyester having a molecular weight of from 700 to 2,500, (B) from 0.3 to 3 moles of a linear aliphatic diol of 2 to 10 carbon atoms, (C) from 0.05 to 0.4 mole of a triol of 3 to 10 carbon atoms, and (D) from 1.35 to 4.7 moles of a diisocyanate of 6 to 30 carbon atoms, the amount of NCO groups being approximately equivalent to the amount of OH groups of the sum of components (A) to (C).
公开/授权文献
- US5395797A Antifuse structure and method of fabrication 公开/授权日:1995-03-07
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