公开(公告)号：EP0405503A3

公开(公告)日：1991-01-16

申请号：EP90112256.4

申请日：1990-06-27

申请人： MITA INDUSTRIAL CO. LTD.

发明人： Kawata, Hideaki ,  Funato, Masatomi ,  Kawano, Nobuaki, Mita Industrial Co., Ltd. ,  Honda, Koji

IPC分类号： G03G9/113

CPC分类号： G03G9/1137 ,  Y10S430/105 ,  Y10T428/2995

摘要： A resin-coated magnetic carrier for two-component developers which comprises magnetic particles and a resin coating formed on the individual magnetic particles is described. The resin coating is made of a cured resin composition comprised of an alkylated melamine resin whose molecular weight satisfies the following inequality
M ≧ 1100C - 400
wherein M represents a weight average molecular weight of the resin and C represents the number of carbon atoms in the alkyl moiety, and an acryl-modified silicone resin. The use of the composition is effective in preventing the coated particles from melt adhesion and in forming a smooth and uniform coating layer on individual particles. The resin-coated carrier is significantly reduced in amount of spend carrier and has good durability, moisture resistance, chargeability.

公开(公告)号：EP0405503B1

公开(公告)日：1995-05-24

申请号：EP90112256.4

申请日：1990-06-27

申请人： MITA INDUSTRIAL CO. LTD.

发明人： Kawata, Hideaki ,  Funato, Masatomi ,  Kawano, Nobuaki, Mita Industrial Co., Ltd. ,  Honda, Koji

IPC分类号： G03G9/113

CPC分类号： G03G9/1137 ,  Y10S430/105 ,  Y10T428/2995

公开(公告)号：EP0405503A2

公开(公告)日：1991-01-02

申请号：EP90112256.4

申请日：1990-06-27

申请人： MITA INDUSTRIAL CO. LTD.

发明人： Kawata, Hideaki ,  Funato, Masatomi ,  Kawano, Nobuaki, Mita Industrial Co., Ltd. ,  Honda, Koji

IPC分类号： G03G9/113

CPC分类号： G03G9/1137 ,  Y10S430/105 ,  Y10T428/2995

摘要： A resin-coated magnetic carrier for two-component developers which comprises magnetic particles and a resin coating formed on the individual magnetic particles is described. The resin coating is made of a cured resin composition comprised of an alkylated melamine resin whose molecular weight satisfies the following inequality
M ≧ 1100C - 400
wherein M represents a weight average molecular weight of the resin and C represents the number of carbon atoms in the alkyl moiety, and an acryl-modified silicone resin. The use of the composition is effective in preventing the coated particles from melt adhesion and in forming a smooth and uniform coating layer on individual particles. The resin-coated carrier is significantly reduced in amount of spend carrier and has good durability, moisture resistance, chargeability.

摘要翻译： 描述了用于双组分显影剂的树脂涂覆的磁性载体，其包含磁性颗粒和形成在各个磁性颗粒上的树脂涂层。 树脂涂层由固化的树脂组合物制成，所述固化的树脂组合物由分子量满足以下不等式M≥1100℃-400的烷基化三聚氰胺树脂组成，其中M表示树脂的重均分子量，C表示烷基中的碳原子数 部分和丙烯酰基改性的有机硅树脂。 该组合物的使用有效地防止了涂布的颗粒熔融粘附并且在各个颗粒上形成光滑和均匀的涂层。 树脂包覆载体的载体量显着减少，并具有良好的耐久性，耐湿性，带电性。