发明授权
US4797344A Encapsulated toner having shell with first vinyl polymer with Mn of
2000-225000 and second vinyl polymer with Mn of 1000-15000
失效
具有第一乙烯基聚合物的壳的包封的调色剂具有2000-225000的Mn和具有1000-15000的Mn的第二乙烯基聚合物
- 专利标题： Encapsulated toner having shell with first vinyl polymer with Mn of 2000-225000 and second vinyl polymer with Mn of 1000-15000
- 专利标题（中）： 具有第一乙烯基聚合物的壳的包封的调色剂具有2000-225000的Mn和具有1000-15000的Mn的第二乙烯基聚合物
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申请号： US911099申请日： 1986-09-24
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公开(公告)号： US4797344A公开(公告)日： 1989-01-10
- 发明人: Toshiaki Nakahara , Ichiro Ohsaki , Hisayuki Ushiyama , Masashi Kiuchi , Masuo Yamazaki , Yasuhide Goseki , Hisayuki Ochi
- 申请人： Toshiaki Nakahara , Ichiro Ohsaki , Hisayuki Ushiyama , Masashi Kiuchi , Masuo Yamazaki , Yasuhide Goseki , Hisayuki Ochi
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX60-214988 19850930
- 主分类号： G03G9/08
- IPC分类号： G03G9/08 ; G03G9/087 ; G03G9/093 ; G03G9/16
摘要：
An encapsulated toner is provided by coating core particles with an outer shell. The outer shell comprises, as predominant components thereof, vinyl polymers A and B of different molecular weights. More specifically, the ratio of the number-average molecular weight of the vinyl polymer A (Mn.sub.A) to that of the vinyl polymer B (Mn.sub.B) is in the range of 2 to 15. The vinyl polymers A and B respectively have a ratio of weight-average molecular weight to number-average molecular weight of 5 or less. Because of these specific molecular weight characteristics of the shell-constituting polymers, the durability and triboelectric charging characteristics of the encapsulated toner are improved. These effects are enhanced particularly when inorganic fine particles are attached to embedded in the surface or surface layer of the core particles.
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