发明授权
- 专利标题： Magnetic recording medium having a binder system including a polyurethane polymer having both phosphonate and quaternary ammonium pendant groups
- 专利标题（中）： 具有包含具有膦酸酯和季铵侧基的聚氨酯聚合物的粘合剂体系的磁记录介质
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申请号： US187824申请日： 1998-11-06
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公开(公告)号： US6139982A公开(公告)日： 2000-10-31
- 发明人: William E. Bottomley , Philip I. Mayo , Ruth M. Erkkila
- 申请人： William E. Bottomley , Philip I. Mayo , Ruth M. Erkkila
- 申请人地址： MN Oakdale
- 专利权人： Imation Corp.
- 当前专利权人： Imation Corp.
- 当前专利权人地址： MN Oakdale
- 主分类号： G11B5/702
- IPC分类号： G11B5/702 ; G11B5/66
摘要：
A magnetic recording medium comprising a magnetic layer provided upon a major surface of a substrate, wherein the magnetic layer includes a magnetic pigment, and a polymeric binder system containing a polyurethane having (1) a plurality of pendant phosphonate ester groups effective for promoting wetting of the magnetic pigment by the polymeric binder system, and (2) at least one quaternary ammonium group effective for promoting wetting of the magnetic pigment by the polymeric binder system.
公开/授权文献
- US4894498A Push button switch having radial leads 公开/授权日：1990-01-16