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发明公开
CN101802721A 磁性调色剂 有权

磁性调色剂
摘要：
一种磁性调色剂，包括包含粘结剂树脂和磁性物质作为必要组分的磁性调色剂颗粒，其特征在于，在将磁性调色剂分散于5mol/l盐酸并溶解于其中的试验中，满足以下关系：0.5≤S3≤10、40≤S15≤80、1.2≤Sc≤10(其中，S3为分散后3分钟时测量的基于磁性物质总含量的磁性物质溶解率(质量％)；S15为分散后15分钟时测量的基于磁性物质总含量的磁性物质溶解率(质量％)；Sc为分散后3分钟至15分钟之间溶解的磁性物质的量(V3→15)与分散后15分钟至30分钟之间溶解的磁性物质的量(V15→30)的比例，即V3→15/V15→30)，并且该调色剂在25℃和在1.0×104Hz频率下的介电损耗因子(tanδ)为2.0×10-3以上至1.5×10-2以下。
摘要（英）：

A magnetic toner comprising magnetic toner particles containing a binder resin and a magnetic substance as the essential components, characterized in that in a test where magnetic toner is dispersed in 5mol/l hydrochloric acid and dissolved therein, the following relationships are satisfied: 0.5 <= S3 <= 10, 40 <= S15 <= 80, 1.2 <= Sc <= 10 (wherein S3 is dissolution ratio (% by mass) of magnetic substance based on the total content of magnetic substance as determined 3 minutes after the dispersion; S15 is dissolution ratio (% by mass) of magnetic substance based on the totalcontent of magnetic substance as determined 15 minutes after the dispersion; and Sc is ratio of the amount (V3->15) of magnetic substance dissolved between 3 and 15 minutes after the dispersion to the amount (V15->30) of magnetic substance dissolved between 15 and 30 minutes after the dispersion, namely, V3->15/V15->30) and that the dielectric loss tangent (tan delta)of the toner at 25 DEG C and a frequency of 1.0104Hz is 2.0x10-3 to 1.5x10-2.

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